CN102253981A

CN102253981A - Method for rapidly displaying and browsing massive models of three-dimensional geographic information system

Info

Publication number: CN102253981A
Application number: CN2011101724789A
Authority: CN
Inventors: 曹新平; 韦凯人; 陈明洁; 王伟; 俞强; 杨诗华; 周美娟; 黄丽; 龚琪慧
Original assignee: SHANGHAI PUBLIC SECURITY BUREAU
Current assignee: SHANGHAI PUBLIC SECURITY BUREAU
Priority date: 2011-06-24
Filing date: 2011-06-24
Publication date: 2011-11-23

Abstract

The invention relates to the field of three-dimensional geographic information systems, in particular to a method for rapidly displaying and browsing massive models of a three-dimensional geographic information system in a three-dimensional scene at high efficiency by utilizing SkylineTerraSuite series software which is mainly applied in more than 75,000 three-dimensional models in Shanghai. In the method, a browser/server B/S system architecture consists of at least three servers and a three-dimensional scene browsing client, and massive three-dimensional models are rapidly displayed and browsed in the three-dimensional scene by using technologies in three-dimensional data optimization, model management, model data network transmission and the like. By the method, related technical problems of model format optimization methods, massive model management methods, three-dimensional model network transmission methods and the like are mainly solved. The invention has the advantages that: the scene display speed is increased, the efficiency of model release, loading, query, addition, modification and the like is improved, the displaying and browsing speed of the models is increased, and the reading speed of data and the displaying speed of the models are increased.

Description

The quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model

Technical field

The present invention relates to a kind of three-dimensional geographic information system field, especially refer to a kind of three-dimensional model surplus the Shanghai City 75000 that is mainly used in, utilize the Skyline TerraSuite groupware, adopt the technology of the aspects such as optimization, model management and model data Network Transmission of three-dimensional data, in three-dimensional scenic, show the quick display navigation method of magnanimity three-dimensional model.

Background technology

The GIS of three-dimensional geographic information system, promptly based on spatial information, technology such as integrated use remote sensing, virtual reality, GPS, computer network, the true appearance that reflects a city in computing machine truly, its content mainly comprise landform in the city, buildings, road, underground utilities and relevant therewith a large amount of humanities, social property etc.At present, in the numerous areas relevant, all press for structure and have powerful three-dimensional visualization function as departments such as city planning, real estate, estate management, tourisms with urban construction.The GIS of three-dimensional geographic information system obtains in three-dimensional data, the description of D Spatial Data Modelling, three-dimensional topology relation and aspects such as expression, three-dimensional visualization and three three-dimensional spatial analysis have all obtained comparatively significant progress.Three-dimensional visualization is the basic function of the GIS of three-dimensional geographic information system.In each stage of setting up, safeguarding and using the three-dimensional geographic information GIS of system, no matter the input of three dimensional object, editor, storage, management, still they are carried out Operations Analyst or output result, all have the Geometric Modeling and the three-dimensional visible expression problem of three dimensional object.The develop rapidly of 3-D data collection technology provides mass data for accurately describing geometric object, but because the restriction of computer software and hardware level, how to realize the quick demonstration of these mass datas and browsing etc. still has to be solved.The transmission speed of data layout and data directly affects the demonstration of model and the effect that the user browses three-dimensional scenic.In data transmission, Bertolotto and Egenhofer(2001) conceptual frame at the vector data progressive transmission at first proposed.Yang Bisheng (2005) has really realized the map vector data progressive transmission, and the method that is proposed can also directly be handled curved surface except handling curve.But these methods are also not obvious for the improvement effect of the network transfer speeds of mass data.

In recent years, three-dimensional visualization and virtual reality technology security department and police unit abroad more and more come into one's own, the domestic a few thing of also having carried out in this respect, as: the 2008 Olympic security Geographic Information System of China, realized the function of map operation, Olympic venue information locating query, security and the comprehensive displaying of police service information on electronic three-dimensional map, the higher actual combat demand that satisfies system has been brought into play huge effect in the security work during Games of the 29th Olympiad, the 13th Paralympic Games; Daliang City Shahekou District public security subbureau adopts the technological frame of browser/server B/S, developed Daliang City public security bureau police service command system, system has realized that three-dimensional map is browsed, the function of Back ground Information placename-querying, the inquiry of early warning scheme, route inquiry and location, locus and video monitoring.The alert at present construction with the three-dimensional geographic information system still is in the starting stage, and numerous existing three-dimensional alert using in the Geographic Information System have only loaded several important building object models, do not realize that the smoothness of magnanimity three-dimensional building object model is browsed.

The Skyline TerraSuite groupware is to utilize aviation image, satellite data, digital elevation model and other two dimension or three-dimensional information source, comprises the three-dimensional interactive environment that Geographic Information System (GIS) data collection etc. is created.It can allow user fused data, new database more apace, and supports large database and real-time information circulation news technology effectively, and this system can also be fast and represents in real time to user's three-dimensional geographic space image.The Skyline TerraSuite groupware is by TerraBuilder, TerraExplorer, and TerraGate, SFS major products such as (Streaming Feature Server) is formed.With a large amount of images, elevation and vector data concentrate in together and set up the three-dimensional geographic information database to TerraBuilder according to accurate three-dimensional geographic information model; TerraGate is used for the server software that the three-dimensional geodata of smooth in real time transmission is carried out the Internet issue.TerraExplorer can be divided into TerraExplorer, TerraExplorer Pro and TerraDeveloper again, and wherein TerraExplorer Pro allows the user via editor, and annotation and analysis of data are created oneself three-dimensional visualization show surroundings; TerraExplorer can allow the user freely to browse the special function that TerraExplorer Pro developed and carry out the basic function that TerraExplorer provides; TerraDeveloper is the secondary development bag of TerraExplorer Pro then, and the user can utilize it to customize the application program of oneself; SFS can read vector data in the mode that flows by network efficiently as the module of TerraGate.

Utilize three-dimensional softwares such as Skyline in three-dimensional scenic, to show magnanimity three-dimensional building object model, traditional mode is all to be loaded in the three-dimensional scenic with all models are disposable, and then begin to roam three-dimensional scenic, initialization time can be longer, and a large amount of three-dimensional models also greatly influences the roam speed of three-dimensional scenic.With more than 75000 three-dimensional model in Shanghai City is example, and the user need wait for 20-30 minute just can finish the initialization of three-dimensional scenic, and tends to when browsing scene because system resources consumption is too much, occurs frequently that machine blocks very much even phenomenon such as deadlock.

For this reason, we utilize the Skyline TerraSuite groupware according to a three-dimensional model surplus the Shanghai City 75000, deeply inquire among the GIS of three-dimensional geographic information system the magnanimity three-dimensional model building gordian technique of display navigation rapidly and efficiently.

Summary of the invention

In order to overcome above-mentioned weak point, fundamental purpose of the present invention aims to provide a kind of at the display technique rapidly and efficiently that is at least 75000 magnanimity three-dimensional model, utilize the three-dimensional geographic information system software of current international mainstream---the Skyline TerraSuite groupware, improvement by model format, model management and prototype network transmission aspects such as (comprising the Web publishing and the loading of model), three-dimensional model is illustrated in the three-dimensional scenic, realizes the efficient quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model that shows in the three-dimensional scenic.

The technical issues that need to address of the present invention are: solve three-dimensional model smooth hardware environment problem that shows in scene; Solve and how to carry out model format optimization, how to manage the magnanimity model, how to carry out the three-dimensional model Network Transmission, realize magnanimity three-dimensional model relevant technologies problem such as smooth demonstration in three-dimensional scenic.

The technical solution adopted for the present invention to solve the technical problems is: the hardware environment of the quick display navigation of a kind of three-dimensional geographic information system's magnanimity model, comprise: client and server end, also comprise: deposit issue three-dimensional modeling data server for two, with a data server of depositing publishing vector figure layer shp, and be used for the client that three-dimensional scenic browses and form browser/server B/S system architecture, based on the Skyline TerraSuite groupware, finish the seamless link of terminal and data distribution server by Web server, under browser environment, provide three-dimensional data to browse to the user, inquiry service is Network Transmission between above-mentioned at least three station servers and the client.

Further, three station servers of the hardware environment of the quick display navigation of described a kind of three-dimensional geographic information system's magnanimity model are provided with Windows Server 2008 operating systems, first is provided with TerraGate and SFS module, is used to issue dimensional topography and polar plot layer data; Second and the 3rd is provided with network information service IIS assembly, is used at least 75000 three-dimensional modeling datas of Web publishing.

Further, the client of the hardware environment of the quick display navigation of described a kind of three-dimensional geographic information system's magnanimity model is browsed and is provided with TerraExplorer Viewer control module.

Further, the output data of the first via .xpl form model A of the server of the hardware environment of the quick display navigation of described a kind of three-dimensional geographic information system's magnanimity model is delivered to the input end that three-dimensional scenic is browsed, the output data of the second road server .xpl form Model B is delivered to the input end that three-dimensional scenic is browsed, and the output data of Third Road server polar plot layer shp is delivered to the input end that three-dimensional scenic is browsed.

Further, the SFS module of the hardware environment of the quick display navigation of described a kind of three-dimensional geographic information system's magnanimity model is the assembly of Skyline, the SFS module generates cache file Cache to the polar plot layer shp of record three-dimensional model information, and to the data Web publishing; For each polar plot layer file, the cache file Cache that generates is made up of three files, these three files are respectively to produce one with the SFS Block Width that sets, with than one of the big generation of SFS Block Width that is provided with to produce one again than the SFS Block Width that is provided with is little.

The quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model, the client that this method is browsed by at least three station servers and three-dimensional scenic is formed browser/server B/S system architecture, by optimizing the three-dimensional model form to reduce the model data amount and to change the display mode of model, utilize polar plot layer-management three-dimensional model then, adopt the network transmission technology issue three-dimensional model of stream mode at last and stress model in three-dimensional scenic, be implemented in quick display navigation magnanimity three-dimensional model in the three-dimensional scenic, comprise three parts:

The optimization of three-dimensional model: the three-dimensional building object model of the 3ds form that will be generated by the main flow modeling software is converted to the xpl model format that adopts stratum level to show the LOD technology, be implemented under the condition that does not influence the picture visual effect, reduce the complicacy of three-dimensional scenic by the grain details of successive reduction buildings, improve the drawing frames speed of three-dimensional scenic, improve the real-time that three-dimensional scenic shows;

With Geographic Information System GIS polar plot layer-management three-dimensional model: with three-dimensional model districts or counties

Show, and to three-dimensional model delete, editing operation, effectively improve the efficiency of management of model data;

Stream mode Network Transmission three-dimensional model: when Web publishing and stress model, adopt stream mode, realize the initialization of three-dimensional scenic building model, speed smoothness when browsing scene;

The concrete job step of display navigation three-dimensional model is in three-dimensional scenic:

Step 1:3ds form model

Will be ready by at least 75000 3ds form models that the main flow modeling software generates;

Step 2:.x form model

Utilize Deep Exploration software with at least 75000 3ds form models, be the format conversion E of .x form model via 3ds form model conversion after, then enter .x form model, in Deep Exploration, realize conversion in batches;

Step 3: the .x form model of districts or counties

A) model grouping

At least 75000 .x form models finishing conversion are divided into groups by the district;

B) deposit

Execute .x form model, after depositing via a minute file, then enter the .x form model of districts or counties, different files is put in the classification of magnanimity three-dimensional model by the district grouping;

Step 4:.x form changes the xpl form and generates txt file simultaneously

After executing the .x form model of districts or counties, for two-way enters .xpl form model and txt file respectively, the instrument MakeXpl.exe that utilizes TerraExplorer to carry converts the .x form three-dimensional data of putting into each file respectively to the three-dimensional model of supporting stratum level to show LOD technology xpl form;

A) the one tunnel execute after .x form model conversion with districts or counties becomes .xpl form model, then enter .xpl form model;

B) another road generates txt file simultaneously, and the model in the identical file folder is done once conversion, has all generated a txt file that has model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the time of each format conversion;

Step 5:txt file changes polar plot layer shp file

A) execute generate txt file after, convert txt file to polar plot layer shp, then enter polar plot layer shp;

B) with the txt file in each file, utilize the arcmap software conversion of ESRI company to export to polar plot layer shp file, comprise model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the polar plot layer shp file;

Step 6: the cache file Cache that generates polar plot layer shp

A) execute polar plot layer shp, after generating cache file, then enter polar plot layer shp cache file;

B) use SFS CacheCreator software, suitable SFS Block Width value is set, generate the cache file Cache of polar plot layer shp, and SFS Block Width value is set according to site coverage;

Step 7: publishing vector figure layer shp

A) open the TerraGate file;

B) add the cache file Cache that generates polar plot layer shp in the step 6 to SFS, publishing vector figure layer shp;

C) the web page address URL of patterned layers sent out in record;

Step 8: issue three-dimensional modeling data

A) will be placed on three-dimensional model under the different files by in network information service IIS, creating virtual directory, the issue three-dimensional model;

B) directory path of record Web publishing;

Load three-dimensional model among the step 9:TerraExplorer

A) execute .xpl form model,, after the three-dimensional data loading, then enter three-dimensional scenic and browse through network information service IIS issue model;

B) in TerraExplorer, load the polar plot layer shp of SFS issue and the three-dimensional modeling data of network information service IIS issue;

C) select " TerraGate SFS " mode under the Server Type to load;

D) the web page address URL of input publishing vector figure layer shp, choosing " Stream " among the Load Option;

E) be provided with at the attribute of figure layer that Type is set to 3D Model in the dialog box;

F) field of the Web publishing path+model name correspondence of input issue three-dimensional modeling data in File Name associates three-dimensional model and polar plot layer shp according to model name, and three-dimensional model is loaded in the three-dimensional scenic;

G) execute polar plot layer shp cache file, after publishing vector figure layer shp and three-dimensional data loading, then enter three-dimensional scenic and browse.

Further, the optimization of the three-dimensional model of the quick display navigation method of described a kind of three-dimensional geographic information system's magnanimity model shows that by stratum level the LOD technology realizes that its concrete job step is:

Step 1: conversion 3ds form model is a .x form model

The output data of 3ds form model is delivered to the input end of format conversion E, and the output data of format conversion E is delivered to the input end of .x form model, and utilizing Deep Exploration software is .x form model with three-dimensional model by the 3ds format conversion;

Step 2: divide file to deposit

Execute after 3ds form model conversion is .x form model, the output data that then enters .x form model is delivered to branch file storage module;

Step 3: convert .xpl form model to

The output data of branch file storage module is divided at least three the tunnel and converts .xpl form model to:

The .x form model A that the first via divides the output data of file storage module to be delivered to districts or counties, the .x form model A output data of districts or counties then enters .xpl form MODEL C and txt file A module respectively behind format conversion A;

The second the tunnel divides the output data of file storage module to be delivered to the .x form Model B of districts or counties, and the .x form Model B output data of districts or counties then enters .xpl form model D and txt file B module respectively behind format conversion B;

The .x form MODEL C that Third Road divides the output data of file storage module to be delivered to districts or counties, the .x form MODEL C output data of districts or counties then enters .xpl form model E and txt file C module respectively behind format conversion C.

Further, the usefulness Geographic Information System GIS polar plot layer-management three-dimensional model management of the quick display navigation method of described a kind of three-dimensional geographic information system's magnanimity model is the polar plot layer shp file management model data that adopt ESRI company, with object abstract be a little, its coordinate is kept in the polar plot layer shp file, when in TerraExplorer Pro, loading polar plot layer shp file, type with point is carried out related with title with object, data are loaded with stream mode, and its concrete job step is:

Step 1: import txt file

In the ArcMap of ESRI company software, import the txt file of each district model;

Step 2: show the XY coordinate data

The output data of txt file module is delivered to and shows XY coordinate data module, execute show the XY coordinate data after, then enter data outputting module, the display model position is:

A) in ArcMap software, click Display XY Date;

B) utilize the model coordinate information that writes down in the txt file, the position of each model is shown in display panel;

C) X Field is set, Y Field, model x sits in the corresponding txt file of Z Field difference

Scale value, model y coordinate figure, model z coordinate figure, in ArcMap with point symbol display model position;

Step 3: tractor figure layer shp file

A) output data of data outputting module is delivered to polar plot layer shp module;

B) after modal position shows, utilize Date Export that the point diagram layer is exported to polar plot layer shp file and preserve;

C) the polar plot layer shp file of preserving has write down model x coordinate figure, model y coordinate figure, model z coordinate figure and model name equally.

Further, the stream mode Network Transmission three-dimensional model of the quick display navigation method of described a kind of three-dimensional geographic information system's magnanimity model is in issue, when loading three-dimensional data, adopt Stream stream mode transmission three-dimensional model, the data block that sends according to request, the Streaming stream mechanism, be that complete data are divided into data block, the user is by the process of desired data piece when system's issue request mode obtains browsing data, for the GIS of three-dimensional geographic information system

The system loads model, come model is loaded in real time by the finding zone when stress model, which model the user just loads when wanting to browse to which model, only loads the instant mode of getting of data in the finding scope, divide two-way to enter the three-dimensional data load-on module, its concrete job step is:

Step 1: the first via generates the cache file Cache of polar plot layer shp

The output data of polar plot layer shp module is delivered to and generates the cache file module;

A) open SFS CacheCreator file;

B) in Add files, select need to generate the polar plot layer shp place catalogue of cache file Cache;

C) click read details button, enumerate out the details of polar plot layer shp, attribute field;

D) in Attributes, select to import to field among the TerraExplorer;

E) select suitable Block width value;

F) the cache file Cache output directory of this polar plot layer of appointment shp in Target directory;

G) click the Generate button and begin to generate cache file Cache;

Step 2: the cache file Cache of publishing vector figure layer shp

After executing the generation cache file, then enter publishing vector figure layer shp module;

A) open TerraGate, select the Layers option under the SFS label;

B) click Add new button, select Pre-cached, the cache file Cache of harsh one-tenth is added among the SFS;

C) clicking the Import button adds cache file Cache in the SFS catalogue to;

D) successfully issue this polar plot layer shp;

Step 3: network information service IIS issues model data

After executing publishing vector figure layer shp, then enter the three-dimensional data load-on module;

A) three-dimensional model that will be placed under the different files is created virtual directory by network information service IIS for each model file folder;

B) issue three-dimensional model;

Step 4: the output data of the second road .xpl form model module is delivered to network information service IIS issue model module;

Step 5: after executing network information service IIS issue model, then enter the three-dimensional data load-on module;

Step 6:TerraExplorer loads three-dimensional model

After executing the three-dimensional data loading, then enter three-dimensional scenic and browse module;

A) the Load Feature Layer file under the right click selection Layer in the inforamtion tree of TerraExplorer;

B) select " TerraGate SFS(WFS) " option under the Server Type;

C) the web page address URL of input SFS publishing vector figure layer shp, choosing " Stream " option among the Load Option;

D) at the attribute of the figure layer option that is provided with that Type is set in the dialog box " 3D Model ";

E) field of the Web publishing path+model name correspondence of input three-dimensional modeling data in File Name;

F) by model name polar plot layer shp and model data are associated;

G) loading and the demonstration of model in the realization three-dimensional scenic.

The invention has the beneficial effects as follows: the present invention adopts stratum level to show LOD technical optimization three-dimensional model structure, improves the scene display speed, and the display speed that is different from traditional three-dimensional model structure is slow; The present invention adopts polar plot layer shp grouping management three-dimensional model, is different from traditional three-dimensional model organizational form, has improved efficient such as model issue, loading, inquiry, interpolation and modification; The present invention is different from traditional model transmission mode by stream mode mode data, has improved the speed that models show is browsed; The present invention is left three-dimensional modeling data in the different servers in polar plot layer shp DATA DISTRIBUTION, reaches load balancing, is different from centralized stores model data and polar plot layer shp data, has improved data read and models show speed.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Accompanying drawing 1 is a hardware environment synoptic diagram of the present invention;

Accompanying drawing 2 is workflow diagrams of the present invention's display navigation three-dimensional model in three-dimensional scenic;

Accompanying drawing 3 is workflow diagrams that three-dimensional model of the present invention is optimized;

Accompanying drawing 4 is polar plot layer shp file management model schematic diagram datas of the present invention;

Accompanying drawing 5 is that prototype network issue of the present invention enters three-dimensional data loading synoptic diagram with dividing two-way;

Label declaration in the accompanying drawing:

1-3ds form model;

2-.x form model;

The .x form model of 3-districts or counties;

4-txt file;

5-.xpl form model;

6-polar plot layer shp;

7-polar plot layer shp cache file;

8-three-dimensional scenic is browsed;

10-format conversion E;

A 20-minute file is deposited;

The .x form model A of 31-districts or counties;

The .x form Model B of 32-districts or counties;

The .x form MODEL C of 33-districts or counties;

40-convert txt file to polar plot layer shp;

41-txt file A;

42-txt file B;

43-txt file C;

50-network information service IIS issues model;

51-.xpl form model A;

52-.xpl form Model B;

53-.xpl form MODEL C;

54-.xpl form model D;

55-.xpl form model E;

60-generation cache file;

70-publishing vector figure layer shp;

80-three-dimensional data loads;

301-format conversion A;

302-format conversion B;

303-format conversion C;

311-the .x form model conversion of districts or counties is become .xpl form model;

312-generation txt file;

401-demonstration XY coordinate data;

The output of 402-data;

Embodiment

See also accompanying drawing 1,2,3,4, shown in 5, the hardware environment of the quick display navigation of a kind of three-dimensional geographic information system's magnanimity model, comprise: client and server end, also comprise: deposit issue three-dimensional modeling data server for two, with a data server of depositing publishing vector figure layer shp 6, and be used for three-dimensional scenic and browse 8 client and form browser/server B/S system architecture, based on the Skyline TerraSuite groupware, finish the seamless link of terminal and data distribution server by Web server, under browser environment, provide three-dimensional data to browse to the user, inquiry service is Network Transmission between above-mentioned at least three station servers and the client.

See also shown in the accompanying drawing 1, further, the output data of the first via .xpl form model A 51 of the server of the hardware environment of the quick display navigation of described a kind of three-dimensional geographic information system's magnanimity model is delivered to three-dimensional scenic and browses 8 input end, the output data of the second road server .xpl form Model B 52 is delivered to three-dimensional scenic and browses 8 input end, and the output data of Third Road server polar plot layer shp 6 is delivered to three-dimensional scenic and browses 8 input end.

See also shown in attached 2, the quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model, this method is browsed 8 client composition browser/server B/S system architecture by at least three station servers and three-dimensional scenic, by optimizing the three-dimensional model form to reduce the model data amount and to change the display mode of model, utilize polar plot layer-management three-dimensional model then, adopt the network transmission technology issue three-dimensional model of stream mode at last and stress model in three-dimensional scenic, be implemented in quick display navigation magnanimity three-dimensional model in the three-dimensional scenic, comprise three parts:

The optimization of three-dimensional model: the three-dimensional building object model of the 3ds form that will be generated by the main flow modeling software is converted to the xpl model format that adopts stratum level to show the LOD technology, be implemented under the condition that does not influence the picture visual effect, reduce the complicacy of three-dimensional scenic by the grain details of successive reduction buildings, improve the drawing frames speed of three-dimensional scenic, improve the real-time that three-dimensional scenic shows; With Geographic Information System GIS polar plot layer-management three-dimensional model: three-dimensional model districts or counties are shown, and to three-dimensional model delete, editing operation, effectively improve the efficiency of management of model data; Stream mode Network Transmission three-dimensional model: when Web publishing and stress model, adopt stream mode, realize the initialization of three-dimensional scenic building model, speed smoothness when browsing scene;

Step 1:3ds form model 1

Will be ready by at least 75000 3ds form models 1 that the main flow modeling software generates;

Step 2:.x form model 2

Utilize Deep Exploration software with at least 75000 3ds form models 1, be the format conversion E 10 of .x form model via 3ds form model conversion after, then enter .x form model 2, in Deep Exploration, realize conversion in batches;

Step 3: the .x form model 3 of districts or counties

A) model grouping

B) deposit

Execute .x form model 2 by district grouping, deposit 20 via a minute file after, then enter the .x form model 3 of districts or counties, different files is put in the classification of magnanimity three-dimensional model;

Step 4:.x form changes the xpl form and generates txt file simultaneously

After executing the .x form model 3 of districts or counties, for two-way enters .xpl form model 5 and txt file 4 respectively, the instrument MakeXpl.exe that utilizes TerraExplorer to carry converts the .x form three-dimensional data of putting into each file respectively to the three-dimensional model of supporting stratum level to show LOD technology xpl form;

A) the one tunnel execute after .x form model conversion with districts or counties becomes .xpl form model 311, then enter .xpl form model 5;

B) another road generates txt file 312 simultaneously, and the model in the identical file folder is done once conversion, has all generated a txt file 4 that has model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the time of each format conversion;

Step 5:txt file changes polar plot layer shp file

A) execute generate txt file 4 after, convert txt file to polar plot layer shp 40, then enter polar plot layer shp 6;

B) with the txt file in each file 4, utilize the arcmap software conversion of ESRI company to export to polar plot layer shp file, comprise model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in polar plot layer shp 6 files;

Step 6: the cache file Cache that generates polar plot layer shp

A) execute polar plot layer shp 6, after generating cache file 60, then enter polar plot layer shp cache file 7;

Step 7: publishing vector figure layer shp

A) open the TerraGate file;

B) add the cache file Cache that generates polar plot layer shp in the step 6 to SFS, publishing vector figure layer shp 70;

C) the web page address URL of patterned layers sent out in record;

Step 8: issue three-dimensional modeling data

B) directory path of record Web publishing;

Load three-dimensional model among the step 9:TerraExplorer

A) execute .xpl form model 5, after 80s through network information service IIS issue model 50 with the three-dimensional data loading, then enter three-dimensional scenic and browse 8;

C) select " TerraGate SFS " mode under the Server Type to load;

G) execute polar plot layer shp cache file 7, after 80s through publishing vector figure layer shp 70 and three-dimensional data loading, then enter three-dimensional scenic and browse 8.

See also shown in attached 3, further, the optimization of the three-dimensional model of the quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model shows that by stratum level the LOD technology realizes that its concrete job step is:

Step 1: conversion 3ds form model is the input end that the output data of .x form model 3ds form model 1 is delivered to format conversion E 10, the output data of format conversion E 10 is delivered to the input end of .x form model 2, and utilizing Deep Exploration software is .x form model with three-dimensional model by the 3ds format conversion;

Step 2: divide file to deposit 20

Execute after 3ds form model conversion is .x form model, the output data that then enters .x form model 2 is delivered to the branch file and deposits 20 modules;

Step 3: convert .xpl form model to

The output data of dividing file to deposit 20 modules is divided at least three the tunnel and converts .xpl form model to:

The output data that the first via divides file to deposit 20 modules is delivered to the .x form model A 31 of districts or counties, and .x form model A 31 output datas of districts or counties then enter .xpl form MODEL C 53 and txt file A 41 modules respectively behind format conversion A 301;

The second tunnel output data of dividing file to deposit 20 modules is delivered to the .x form Model B 32 of districts or counties, and .x form Model B 32 output datas of districts or counties then enter .xpl form model D 54 and txt file B 42 modules respectively behind format conversion B 302;

The output data that Third Road divides file to deposit 20 modules is delivered to the .x form MODEL C 33 of districts or counties, and .x form MODEL C 33 output datas of districts or counties then enter .xpl form model E 55 and txt file C 43 modules respectively behind format conversion C 303.

See also shown in attached 4, further, the usefulness Geographic Information System GIS polar plot layer-management three-dimensional model management of the quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model is the polar plot layer shp file management model data that adopt ESRI company, with object abstract be a little, its coordinate is kept in the polar plot layer shp file, when in TerraExplorer Pro, loading polar plot layer shp file, type with point is carried out related with title with object, data are loaded with stream mode, and its concrete job step is:

Step 1: import txt file 4

In the ArcMap of ESRI company software, import the txt file 4 of each district model;

Step 2: show XY coordinate data 401

The output data of txt file 4 modules is delivered to and shows XY coordinate data 401 modules, execute show XY coordinate data 401 after, then enter data and export 402 modules, the display model position is:

A) in ArcMap software, click Display XY Date;

C) X Field is set, Y Field, Z Field be model x coordinate figure, model y coordinate figure in the corresponding txt file respectively, model z coordinate figure, in ArcMap with point symbol display model position;

Step 3: tractor figure layer shp 6 files

A) the data output data of exporting 402 modules is delivered to polar plot layer shp 6 modules;

See also shown in attached 5, further, the stream mode Network Transmission three-dimensional model of the quick display navigation method of described a kind of three-dimensional geographic information system's magnanimity model is in issue, when loading three-dimensional data, adopt Stream stream mode transmission three-dimensional model, the data block that sends according to request, the Streaming stream mechanism, be that complete data are divided into data block, the user is by the process of desired data piece when system's issue request mode obtains browsing data, for three-dimensional geographic information system generalized information system stress model, when stress model, come model is loaded in real time by the finding zone, which model the user just loads when wanting to browse to which model, only load the instant mode of getting of data in the finding scope, divide two-way to enter three-dimensional data and load 80 modules, its concrete job step is:

Step 1: the first via generates the cache file Cache of polar plot layer shp

The output data of polar plot layer shp 6 modules is delivered to and generates cache file 60 modules;

A) open SFS CacheCreator file;

D) in Attributes, select to import to field among the TerraExplorer;

E) select suitable Block width value;

G) click the Generate button and begin to generate cache file Cache;

Step 2: the cache file Cache of publishing vector figure layer shp

After executing generation cache file 60, then enter publishing vector figure layer shp 70 modules;

A) open TerraGate, select the Layers option under the SFS label;

C) clicking the Import button adds cache file Cache in the SFS catalogue to;

D) successfully issue this polar plot layer shp;

Step 3: after network information service IIS issue model data executes publishing vector figure layer shp 70, then enter three-dimensional data and load 80 modules;

A) three-dimensional model that will be placed under the different files is each mould by network information service IIS

The type file is created virtual directory;

B) issue three-dimensional model;

Step 4: the output data of the second road .xpl form model, 5 modules is delivered to network information service IIS issue model 50 modules;

Step 5: after executing network information service IIS issue model 50, then enter three-dimensional data and load 80 modules;

Step 6:TerraExplorer loads three-dimensional model

After executing three-dimensional data loading 80, then enter three-dimensional scenic and browse 8 modules;

B) " TerraGate SFS " option under the selection Server Type;

F) by model name polar plot layer shp and model data are associated;

Hardware environment of the present invention is as follows:

Because the present invention is based on the browser/server B/S pattern that adopts, finish the seamless link of terminal and data distribution server by the network Web server, provide to the user under browser environment that three-dimensional data is browsed, inquiry service.This system's three-dimensional data amount is bigger, and is higher relatively to the machine performance requirement, is the effect that the assurance system uses, and the present invention adopts:

(1) client running environment is as follows:

Operating system: Windows 2000 professional, Windows XP Home/ professional

Browsing software: Internet Explorer 6 or more than, recommend to use Internet Explorer 8

Support programs: DirectX 9.0

Processor (CPU): dominant frequency is greater than 2.0GHz

Internal memory (RAM): more than the 1G

Video card: independent video card, more than the video memory 512M

Plug-in unit: client is browsed needs to install TerraExplorer Viewer control

(2) server end running environment is as follows:

Because the demand of magnanimity three-dimensional data, server end needs three station servers, adopts Windows Server 2008 operating systems.TerraGate and SFS module are installed, are used to issue dimensional topography and polar plot layer data for first; Second and the 3rd install network information service IIS assembly, are used for a three-dimensional modeling data surplus the Web publishing 75000.

Technical characterictic of the present invention is:

At first by optimizing the three-dimensional model form to reduce the model data amount and to change the display mode of model, utilize polar plot layer-management three-dimensional model then, adopt the network transmission technology issue three-dimensional model of stream mode at last and in three-dimensional scenic stress model, be implemented in the three-dimensional scenic display navigation magnanimity three-dimensional model fast.This invention technology mainly comprises following three aspects: the 1) optimization of three-dimensional model.The three-dimensional building object model of the 3ds form that will be generated by the main flow modeling software is converted to and adopts stratum level to show LOD(Level Of Detail) the xpl model format of technology, be implemented under the condition that does not influence the picture visual effect, reduce the complicacy of three-dimensional scenic by the grain details of successive reduction buildings, improve the drawing frames speed of three-dimensional scenic, improved the real-time that three-dimensional scenic shows; 2) with Geographic Information System GIS polar plot layer-management three-dimensional model, realize that the districts or counties of three-dimensional model show, and can be easily to three-dimensional model delete, operation such as editor, effectively improve the efficiency of management of model data; 3) stream mode Network Transmission three-dimensional model.When Web publishing and stress model, adopt stream mode, realize that three-dimensional scenic (comprising a three-dimensional building object model surplus in the of 75000) initialization time almost ignores and the effect of speed smoothness when browsing scene.

The optimization of first aspect content model is to show that by stratum level the LOD technology realizes three-dimensional model optimization.Stratum level shows that the LOD technology is improving the scene display speed, realizing being widely used aspect the real-time, interactive, its principle is exactly that same object is set up several finenesses model inequality, when the distance of object and viewpoint is far away, carry out modeling rendering with regard to utilizing the lower model of fineness; And when object and viewpoint close together, just utilizing degrees of detail higher, exquisite model is drawn.The distinctive .xpl model format of TerraExplorer supports stratum level to show the LOD technology, this model format is that the three-dimensional model by the .x form is transformed, generated one group of proprietary model pyramid form that on pinup picture, carries out the level of detail classification display of Skyline, comprised the .x model with its all pinup picture files that call.The instrument MakeXpl.exe that carries by TerraExplorer can convert the three-dimensional model of .x form to .xpl form model, TerraExplorer can judge that automatically generating what stratum level shows LOD according to the precision of pinup picture file, the highlyest is 4 grades and has stratum level and show LOD.That is: a * .x file can generate * .xpl and * _ LOD_n.xpl, and n is had stratum level by this model and shows the LOD number of plies, n for smaller or equal to 4 natural numbers and because of the complexity of model different.

Stratum level shows LOD technical optimization three-dimensional model concrete steps:

1. conversion 3ds form model is a .x form model

Utilizing Deep Exploration software is the .x form with three-dimensional model by the 3ds format conversion, can realize conversion in batches at Deep Exploration.

2. model grouping

A .x form model is by the district grouping surplus the Shanghai City 75000 that conversion is good, and the three-dimensional model in each district is put into different files.

3. convert .xpl form model to

Open instrument MakeXpl.exe(MakeXpl.exe that TerraExplorer carries generally under the installation directory of TerraExplorer Pro), press the file in district then respectively with .x form model conversion xpl form, for the coordinate with each district model is recorded in respectively in the txt file, one of Center down object pivot is chosen.At this moment, can generate a * .txt file that has model x coordinate figure, model y coordinate figure, model z coordinate figure and model name.

The management of second aspect content model is polar plot layer shp (shapefile) the file management model data that adopt ESRI company, its principle is that object is abstract in point, its coordinate is kept in the polar plot layer shp file, when in TerraExplorer Pro, loading polar plot layer shp file, type (TE _ TYPE) and title (TE _ FNAME) carry out related herein with point with object (being three-dimensional model), thereby data are loaded with stream mode (Streaming), improved efficient.For a three-dimensional model surplus the Shanghai City 75000, model data is generated polar plot layer shp file by the district grouping, in the attribute list of polar plot layer shp, note each model center point position, height value, placement angle, model name etc.Polar plot layer shp file is related by polar plot layer shp file field model name with three-dimensional model.Model separated into two parts issue during Web publishing, one is the polar plot layer shp file of administrative model, another is exactly the three-dimensional model file of xpl form.After polar plot layer shp file and the issue of three-dimensional model file network, in TerraExplorer, be provided with then the stream mode of polar plot layer shp file with the polar plot layer added, the see below introduction of third aspect content of concrete issue and loading method.The management of three-dimensional model is optimized in processing such as deletion that like this can be by the operation of polar plot layer shp file being carried out three-dimensional model, editor.

The concrete steps of polar plot layer shp administrative model data are:

1. importing txt file

In the ArcMap of ESRI company software, import the txt file of each district model.

2. display model position

In ArcMap software, click Display XY Date, utilize the model coordinate information that writes down in the txt file that the position of each model is shown in display panel, X Field is set, Y Field, model x coordinate figure, model y coordinate figure in the corresponding txt file of Z Field difference, model z coordinate figure can be seen in ArcMap with point symbol display model position.

3. tractor figure layer shp file

After modal position shows, utilize Date Export that the point diagram layer is exported to polar plot layer shp file and preserve.The polar plot layer shp file of preserving has write down model x coordinate figure, model y coordinate figure, model z coordinate figure and model name equally.

Third aspect content model data transmission is in issue, when loading three-dimensional data, adopt stream mode transmission three-dimensional model, Stream promptly flows, it is the data block that sends according to request, Streaming is a stream mechanism, be that complete data are divided into data block, the user is by the process of desired data piece when system's issue request mode obtains browsing data.For the GIS of three-dimensional geographic information system stress model, stream mechanism then means when stress model to come model is loaded in real time by finding zone (this scope can be regulated voluntarily by the parameter setting is set), be which model the user just loads when wanting to browse to which model, only load the mode of the data in the finding scope.The characteristics of this " instant getting " have remedied the shortcoming of traditional display mode, have saved unnecessary consumption of system resources, thereby have improved the operational efficiency of three-dimensional scenic greatly.For Shanghai City magnanimity three-dimensional model, the polar plot layer shp of record three-dimensional model information generated cache file Cache and to the data Web publishing by SFS.SFS is the assembly of Skyline, can realize efficiently that in the mode of stream from the Oracle spatial database, ArcSDE reads vector data among the SQL etc. by network.It uses caching mechanism, in advance important data Layer is stored in the cache file Cache, makes can read video data at a high speed in client TerraExplorer browser, and supports many concurrent users.Cache file Cache is and the product of Streaming mode combination, relates to the setting of a SFS Block Width, determines the scope of return data piece in the stream mode by parameter S FS Block Width value is set.So TerraExplorer reads cache file speed can be fast.For each polar plot layer file, the cache file Cache of generation comprises three files.These three files are respectively to produce one with the SFS Block Width that sets, and with than one of the big generation of SFS Block Width that is provided with to produce one again than the SFS Block Width that is provided with is little, these three files have been formed a cache file.SFS can be described as the network element service WFS that Skyline oneself makes up, and before client is introduced network element service WFS, data is optimized setting, to improve display efficiency.Because SFS is the vector data issue instrument at Skyline, makes that the degrees of fusion of data and TerraExplorer browser is higher, has improved reading efficiency greatly.Vector data is issued the network address visit data that client can provide by SFS by SFS.In TerraExplorer, setting loads the polar plot layer shp of SFS issue with stream mode (being the stream mode), deposit path field by model among the polar plot layer shp and read three-dimensional model and be loaded in the three-dimensional scenic, be implemented in and efficiently read three-dimensional model among the TerraExplorer fast.

Adopt the concrete steps of stream mode issue, loading three-dimensional data to be:

1. generate the cache file Cache of polar plot layer shp

Open SFS CacheCreator, in Add files, select to need generate the polar plot layer shp place catalogue of cache file Cache, click read details button, will enumerate out the details of each district polar plot layer shp of Shanghai City, as attribute field etc.Subsequently, in Attributes, select to import to field Name and LG_ID among the TerraExplorer, this field is the ID numbering of camera, select suitable Block width value (generally select 1222m effect preferable) simultaneously, last cache file Cache output directory of in Target directory, specifying this polar plot layer shp,, click the Generate button and begin to generate cache file.

2. publishing vector figure layer shp

Open TerraGate, select the Layers option under the SFS label, click Add new button, select Pre-cached, the cache file of harsh one-tenth is added among the SFS, click the Import button cache file Cache is added in the SFS catalogue, then successfully issue this polar plot layer shp.

3. network information service IIS issues model data

The Shanghai City three-dimensional model that is placed under the different files is created virtual directory, the issue three-dimensional model by network information service IIS for each model file folder.Utilize network path " http://ip: port numbers/virtual directory name/model name .xpl " promptly to may be read into the three-dimensional model file.

4. TerraExplorer loads three-dimensional model

The Load Feature Layer under the Layer is selected in right click in the inforamtion tree of TerraExplorer, under the selection Server Type " TerraGate SFS(WFS) ", the web page address URL of input SFS publishing vector figure layer shp, choosing " Stream " among the Load Option, be provided with at the attribute of figure layer that Type is set to 3D Model in the dialog box, input in File Name " http://ip: port numbers/virtual directory name /+corresponding polar plot layer shp in the model name field ", polar plot layer shp and model data are associated, promptly they are corresponding one by one by model name, realize the loading and the demonstration of model in the three-dimensional scenic.

The technical scheme flow process is:

Step 1:3ds form changes the .x form

In conversion software (as Deep Exploration), convert the three-dimensional model of 3ds form to the .x formatted file in batches.

Step 2: model grouping

Different files is put in magnanimity three-dimensional model classification, put into different files such as a BUILDINGS MODELS surplus the Shanghai City 75000 according to Shanghai City administrative division districts or counties, so that model management.

Step 3:.x form changes the xpl form and generates txt file

The .x form three-dimensional data that the instrument MakeXpl.exe that utilizes TerraExplorer to carry will put into each file converts the three-dimensional model of supporting stratum level to show LOD technology xpl form respectively to.Generally the model in the identical file folder is done once conversion, all generated a txt file that has model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the time of each format conversion.

Step 4:txt file changes polar plot layer shp file

Utilize the arcmap software conversion of ESRI company to export to polar plot layer shp file the txt file in each file, comprise model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the polar plot layer shp file.

Step 5: the cache file Cache that generates polar plot layer shp

Use the suitable SFS Block Width value of SFS CacheCreator software setting, generate the cache file Cache of polar plot layer shp, according to site coverage SFS Block Width value is set, SFS Block Width value is traditionally arranged to be 611m or 1222m, to guarantee the fast browsing of three-dimensional model.

Step 6: publishing vector figure layer shp

Open TerraGate, add the cache file Cache that generates in the step 5 to SFS, publishing vector figure layer shp, the web page address URL of patterned layers sent out in record.

Step 7: issue three-dimensional modeling data

To be placed on three-dimensional model under the different files by in network information service IIS, creating virtual directory, the issue three-dimensional model, the directory path of Web publishing is " http://ip: port numbers/virtual directory name ".

Load three-dimensional model among the step 8:TerraExplorer

In TerraExplorer, load the polar plot layer shp of SFS issue and the three-dimensional modeling data of network information service IIS issue.Select " TerraGate the SFS(WFS) " mode under the Server Type to load, the web page address URL of polar plot layer shp in the input step 6, choosing " Stream " among the Load Option, be provided with at the attribute of figure layer that Type is set to 3D Model in the dialog box, the field of the Web publishing of three-dimensional model path+model name correspondence in the input step 7 in File Name, i.e. " http://ip: port numbers/virtual directory name "+"/model name ", according to model name three-dimensional model and polar plot layer shp are associated, three-dimensional model is loaded in the three-dimensional scenic.Like this, just can be implemented in the three-dimensional scenic fast browsing three-dimensional model.

The present invention utilizes the Skyline TerraSuite groupware, and by model optimization, model grouping management and based on the issue of the model of stream mode with load is implemented in and efficiently shows a three-dimensional model surplus the Shanghai City 75000 in the three-dimensional scenic fast.

The present invention is further described below in conjunction with description of drawings and embodiment.

Consult shown in the accompanying drawing 1, hardware environment of the present invention mainly comprises: three station servers (deposit the issue three-dimensional modeling data for two, deposit publishing vector figure layer shp data for) and plurality of client end (display navigation three-dimensional scenic) are formed the B/S system architecture.To a three-dimensional model surplus the Shanghai City 75000, at first all three-dimensional models with the 3ds form convert .x form model to, and these models are divided into groups by Shanghai City administrative division districts or counties, put into different files respectively, the instrument MakeXpl.exe that utilizes TerraExplorer to carry respectively the three-dimensional model in each district converts the xpl form to again, each file generates a txt file simultaneously, x coordinate figure, y coordinate figure, z coordinate figure and the model name of three-dimensional model in the log file folder; Convert all txt files to the shapefile file at ArcMap, x coordinate figure, y coordinate figure, z coordinate figure and the model name of three-dimensional model have been write down equally, then in SFS CacheCreator software, generate the cache file Cache of polar plot layer shp, and in SFS publishing vector figure layer shp, utilize network information service IIS to create virtual directory issue three-dimensional model simultaneously; Above all three-dimensional models and polar plot layer shp leave server end in; The three-dimensional modeling data of the cache file Cache of the last polar plot layer shp that loading SFS issues in the TerraExplorer of client and network information service IIS issue, the quick display navigation of three-dimensional model in the realization three-dimensional scenic.

As shown in Figure 2, described employing stratum level shows that LOD technical optimization three-dimensional model step is as follows:

1. conversion 3ds form model is a .x form model

Utilizing Deep Exploration software is the .x form with the Shanghai City three-dimensional model by the 3ds format conversion, can realize conversion in batches at Deep Exploration.

2. model grouping

3. convert .xpl form model to

As shown in Figure 3, the step of described employing polar plot layer shp management three-dimensional model is as follows:

1. importing txt file

2. display model position

3. tractor figure layer shp

After modal position shows, utilize Date Export that the point diagram layer is exported to polar plot layer shp and preserve.The polar plot layer shp file of preserving has write down model x coordinate figure, model y coordinate figure, model z coordinate figure and model name equally.

As shown in Figure 4, the described step of utilizing flow model to carry out the model data transmission is as follows:

1. generate the cache file Cache of polar plot layer shp

Open SFS CacheCreator, in Add files, select to need to generate the polar plot layer shp place catalogue of cache file Cache, click read details button, will enumerate out the details of each district model polar plot layer shp of Shanghai City, as attribute field etc.Subsequently, in Attributes, select to import to the field among the TerraExplorer, select suitable Block width value (generally select 1222m effect preferable) simultaneously, last cache file Cache output directory of specifying this polar plot layer shp in Target directory is clicked the Generate button and is begun to generate cache file Cache.

2. publishing vector figure layer shp

Open TerraGate, select the Layers option under the SFS label, click Add new button, select Pre-cached, the cache file Cache of harsh one-tenth is added among the SFS, click the Import button cache file Cache is added in the SFS catalogue, then successfully issue this polar plot layer shp.

3. network information service IIS issues model data

4.TerraExplorer Load three-dimensional model

The Load Feature Layer under the Layer is selected in right click in the inforamtion tree of TerraExplorer, under the selection Server Type " TerraGate SFS(WFS) ", the web page address URL of the polar plot layer shp of input SFS issue, choosing " Stream " among the Load Option, be provided with at the attribute of figure layer that Type is set to 3D Model in the dialog box, input in File Name " http://ip: port numbers/virtual directory name /+corresponding polar plot layer shp in the model name field ", by model name polar plot layer shp and model data are associated, realize the loading and the demonstration of model in the three-dimensional scenic.

The concrete job step of one of embodiment of the invention is as follows:

Step 1:3ds form changes the .x form

In conversion software (as Deep Exploration), convert the three-dimensional model of a 3ds form surplus the Shanghai City 75000 to the .x formatted file in batches.

Step 2: model grouping

A BUILDINGS MODELS surplus the Shanghai City 75000 according to the grouping of Shanghai City administrative division districts or counties, is put into different files respectively, so that model management.

Step 3:.x form changes the xpl form and generates txt file

The .x form three-dimensional data that the instrument MakeXpl.exe that utilizes TerraExplorer to carry will put into each file converts the three-dimensional model of supporting stratum level to show LOD technology xpl form respectively to.Model in the identical file folder is done once conversion in batches, one of Center down object pivot is chosen, all generated a txt file that has model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the time of each format conversion.

Step 4:txt file changes polar plot layer shp file

In ArcMap, import txt file, click Display XY Date, utilize the model coordinate information that writes down in the txt file that the position of each model is shown in display panel, X Field is set, Y Field, model x coordinate figure, model y coordinate figure can be seen in ArcMap with point symbol display model position in the corresponding txt file of Z Field difference.

After modal position shows, utilize Date Export that the point diagram layer is exported to polar plot layer shp and preserve.As shown in table 1, the polar plot layer shp that preserves write down model x coordinate figure, model y coordinate figure, model z coordinate figure and model name equally.

Step 5: the cache file Cache that generates polar plot layer shp

Open SFS CacheCreator, in Add files, select to need generate the polar plot layer shp place catalogue of cache file Cache, click read details button, will enumerate out the details of each district polar plot layer shp of Shanghai City, as attribute field etc.Subsequently, in Attributes, select to import to field Name and LG_ID among the TerraExplorer, this field is the ID numbering of camera, select suitable Block width value (generally select 1222m effect preferable) simultaneously, last cache file Cache output directory of in Target directory, specifying this polar plot layer shp,, click the Generate button and begin to generate cache file Cache.

Step 6: publishing vector figure layer shp

Open TerraGate, add the cache file Cache that generates in the step 5 to SFS, publishing vector figure layer shp, the web page address URL of record diagram layer issue.

Step 7: issue three-dimensional modeling data

To be placed on Shanghai City three-dimensional model under the different files by in network information service IIS, creating virtual directory, the issue three-dimensional model, the directory path of Web publishing is " http://ip: port numbers/virtual directory name ".

Load three-dimensional model among the step 8:TerraExplorer

In TerraExplorer, load the polar plot layer shp of SFS issue and the three-dimensional modeling data of network information service IIS issue.Select Server Type " TerraGate SFS(WFS) " mode down to load, the web page address URL of polar plot layer shp in the input step 6 selects among the Load Option " Stream ".Then, as shown in Figure 8, be provided with at the attribute of figure layer that Type is set to 3D Model in the dialog box, the field of the Web publishing of three-dimensional model path+model name correspondence in the input step 7 in File Name, i.e. " http://ip: port numbers/virtual directory name "+"/NAME ", according to model name that three-dimensional model is corresponding with polar plot layer shp, three-dimensional model is loaded in the three-dimensional scenic.Like this, just can be implemented in the three-dimensional scenic fast browsing three-dimensional model.

Technology and method according to the present invention's introduction, at server end publishing vector figure layer shp file and Shanghai City three-dimensional model, when client is opened the three-dimensional scenic that contains a three-dimensional model model surplus the Shanghai City 75000, the calculation of almost can ignoring of its initialization time, display speed is fast, can smooth browse three-dimensional models whole in the scene.

Claims

1. the hardware environment of the quick display navigation of three-dimensional geographic information system magnanimity model, comprise: client and server end, it is characterized in that also comprising: deposit issue three-dimensional modeling data server for two, with one deposit publishing vector figure layer shp(6) data server, and be used for three-dimensional scenic and browse the client of (8) and form browser/server B/S system architecture, based on the Skyline TerraSuite groupware, finish the seamless link of terminal and data distribution server by Web server, under browser environment, provide three-dimensional data to browse to the user, inquiry service is Network Transmission between above-mentioned at least three station servers and the client.

2. the hardware environment of the quick display navigation of a kind of three-dimensional geographic information system's magnanimity model according to claim 1, it is characterized in that: described three station servers are provided with Windows Server 2008 operating systems, first is provided with TerraGate and SFS module, is used to issue dimensional topography and polar plot layer data; Second and the 3rd is provided with network information service IIS assembly, is used at least 75000 three-dimensional modeling datas of Web publishing.

3. the hardware environment of the quick display navigation of a kind of three-dimensional geographic information system's magnanimity model according to claim 1, it is characterized in that: described client is browsed and is provided with TerraExplorer Viewer control module.

4. the hardware environment of the quick display navigation of a kind of three-dimensional geographic information system's magnanimity model according to claim 1, it is characterized in that: the output data first via .xpl form model A(51 of described server) is delivered to the input end that three-dimensional scenic is browsed (8), the output data of the second road server .xpl form Model B (52) is delivered to the input end that three-dimensional scenic is browsed (8), Third Road server polar plot layer shp(6) output data be delivered to the input end that three-dimensional scenic is browsed (8).

5. the hardware environment of the quick display navigation of a kind of three-dimensional geographic information system's magnanimity model according to claim 2, it is characterized in that: described SFS module is the assembly of Skyline, and the SFS module generates cache file to the polar plot layer shp of record three-dimensional model information

Cache, and to the data Web publishing; For each polar plot layer file, the cache file Cache that generates is made up of three files, these three files are respectively to produce one with the SFS Block Width that sets, with than one of the big generation of SFS Block Width that is provided with to produce one again than the SFS Block Width that is provided with is little.

6. quick display navigation method of three-dimensional geographic information system magnanimity model, it is characterized in that: the client that this method is browsed (8) by at least three station servers and three-dimensional scenic is formed browser/server B/S system architecture, by optimizing the three-dimensional model form to reduce the model data amount and to change the display mode of model, utilize polar plot layer-management three-dimensional model then, adopt the network transmission technology issue three-dimensional model of stream mode at last and stress model in three-dimensional scenic, be implemented in quick display navigation magnanimity three-dimensional model in the three-dimensional scenic, comprise three parts:

Step 1:3ds form model (1)

Will be ready by at least 75000 3ds form models (1) that the main flow modeling software generates;

Step 2:.x form model (2)

Utilize Deep Exploration software with at least 75000 3ds form models (1), via 3ds form model conversion is the format conversion E(10 of .x form model) after, then enter .x form model (2), in Deep Exploration, realize conversion in batches;

Step 3: the .x form model (3) of districts or counties

A) model grouping

B) deposit

Execute .x form model (2) by district grouping, deposit (20) via a minute file after, then enter the .x form model (3) of districts or counties, different files is put in the classification of magnanimity three-dimensional model;

Step 4:.x form changes the xpl form and generates txt file simultaneously

After executing the .x form model (3) of districts or counties, for two-way enters .xpl form model (5) and txt file (4) respectively, the instrument MakeXpl.exe that utilizes TerraExplorer to carry converts the .x form three-dimensional data of putting into each file respectively to the three-dimensional model of supporting stratum level to show LOD technology xpl form;

A) the one tunnel execute after .x form model conversion with districts or counties becomes .xpl form model (311), then enter .xpl form model (5);

B) another road generates txt file (312) simultaneously, model in the identical file folder is done once conversion, has all generated a txt file (4) that has model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the time of each format conversion;

Step 5:txt file changes polar plot layer shp file

A) execute generate txt file (4) after, convert txt file to polar plot layer shp(40), then enter polar plot layer shp(6);

B), utilize the arcmap software conversion of ESRI company to export to polar plot layer shp file, polar plot layer shp(6 with the txt file in each file (4)) comprise model x coordinate figure, model y coordinate figure, model z coordinate figure and model name in the file;

Step 6: the cache file Cache that generates polar plot layer shp

A) execute polar plot layer shp(6), after generating cache file (60), then enter polar plot layer shp cache file (7);

Step 7: publishing vector figure layer shp

A) open the TerraGate file;

B) add the cache file Cache that generates polar plot layer shp in the step 6 to SFS, publishing vector figure layer shp(70);

C) the web page address URL of patterned layers sent out in record;

Step 8: issue three-dimensional modeling data

B) directory path of record Web publishing;

Load three-dimensional model among the step 9:TerraExplorer

A) execute .xpl form model (5),, after three-dimensional data loading (80), then enter three-dimensional scenic and browse (8) through network information service IIS issue model (50);

C) select " TerraGate SFS " mode under the Server Type to load;

G) execute polar plot layer shp cache file (7), through publishing vector figure layer shp(70) and after three-dimensional data loads (80), then enter three-dimensional scenic and browse (8).

7. a kind of three-dimensional geographic information according to claim 6 system magnanimity model is quick

The display navigation method is characterized in that: the optimization of described three-dimensional model shows that by stratum level the LOD technology realizes that its concrete job step is:

Step 1: conversion 3ds form model is a .x form model

The output data of 3ds form model (1) is delivered to format conversion E(10) input end, format conversion E(10) output data is delivered to the input end of .x form model (2), and utilizing Deep Exploration software is .x form model with three-dimensional model by the 3ds format conversion;

Step 2: divide file to deposit (20)

Execute after 3ds form model conversion is .x form model, the output data that then enters .x form model (2) is delivered to the branch file and deposits (20) module;

Step 3: convert .xpl form model to

The output data of dividing file to deposit (20) module is divided at least three the tunnel and converts .xpl form model to:

The output data that the first via divides file to deposit (20) module is delivered to the .x form model A(31 of districts or counties), the .x form model A(31 of districts or counties) output data is through format conversion A(301) after, then enter .xpl form MODEL C (53) and txt file A(41 respectively) module;

The second tunnel output data of dividing file to deposit (20) module is delivered to the .x form Model B (32) of districts or counties, and .x form Model B (32) output data of districts or counties is through format conversion

B(302) after, then enter .xpl form model D(54 respectively) and txt file B(42) module;

The output data that Third Road divides file to deposit (20) module is delivered to the .x form MODEL C (33) of districts or counties, .x form MODEL C (33) output data of districts or counties is through format conversion C(303) after, then enter .xpl form model E (55) and txt file C(43 respectively) module.

8. the quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model according to claim 6, it is characterized in that: described is the polar plot layer shp file management model data that adopt ESRI company with the management of Geographic Information System GIS polar plot layer-management three-dimensional model, with object abstract be a little, its coordinate is kept in the polar plot layer shp file, when in TerraExplorer Pro, loading polar plot layer shp file, type with point is carried out related with title with object, data are loaded with stream mode, and its concrete job step is:

Step 1: import txt file (4)

In the ArcMap of ESRI company software, import the txt file (4) of each district model;

Step 2: show XY coordinate data (401)

The output data of txt file (4) module is delivered to and shows XY coordinate data (401) module, execute show XY coordinate data (401) after, then enter data output (402) module, the display model position is:

A) in ArcMap software, click Display XY Date;

Step 3: file tractor figure layer shp(6)

A) output data of data output (402) module is delivered to polar plot layer shp(6) module;

9. the quick display navigation method of a kind of three-dimensional geographic information system's magnanimity model according to claim 6, it is characterized in that: described stream mode Network Transmission three-dimensional model is in issue, when loading three-dimensional data, adopt Stream stream mode transmission three-dimensional model, the data block that sends according to request, the Streaming stream mechanism, be that complete data are divided into data block, the user is by the process of desired data piece when system's issue request mode obtains browsing data, for three-dimensional geographic information system generalized information system stress model, when stress model, come model is loaded in real time by the finding zone, which model the user just loads when wanting to browse to which model, only load the instant mode of getting of data in the finding scope, divide two-way to enter three-dimensional data and load (80) module, its concrete job step is:

Step 1: the first via generates the cache file Cache of polar plot layer shp

Polar plot layer shp(6) output data of module is delivered to and generates cache file (60) module;

A) open SFS CacheCreator file;

D) in Attributes, select to import to field among the TerraExplorer;

E) select suitable Block width value;

G) click the Generate button and begin to generate cache file Cache;

Step 2: the cache file Cache of publishing vector figure layer shp

After executing generation cache file (60), then enter publishing vector figure layer shp(70) module;

A) open TerraGate, select the Layers option under the SFS label;

C) clicking the Import button adds cache file Cache in the SFS catalogue to;

D) successfully issue this polar plot layer shp;

Step 3: network information service IIS issues model data

Execute publishing vector figure layer shp(70) after, then enter three-dimensional data and load (80) module;

The type file is created virtual directory;

B) issue three-dimensional model;

Step 4: the output data of the second road .xpl form model (5) module is delivered to network information service IIS issue model (50) module;

Step 5: after executing network information service IIS issue model (50), then enter three-dimensional data and load (80) module;

Step 6:TerraExplorer loads three-dimensional model

After executing three-dimensional data loading (80), then enter three-dimensional scenic and browse (8) module;

B) " TerraGate SFS " option under the selection Server Type;

F) by model name polar plot layer shp and model data are associated;