CN106933961A - Based on the three-dimensional police geographical information platform that commanding elevation automatically analyzes - Google Patents
Based on the three-dimensional police geographical information platform that commanding elevation automatically analyzes Download PDFInfo
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Abstract
The present invention relates to a kind of three-dimensional police geographical information platform automatically analyzed based on commanding elevation.It solves prior art and cannot realize the technical problems such as commanding elevation analysis.Including three-dimensional Police Geographic Information System and the commanding elevation automatic analysis system being connected on three-dimensional Police Geographic Information System, three-dimensional Police Geographic Information System is configured as fusion outdoor scene threedimensional model, selected interior of building modeling data, plane geography information and police information, and commanding elevation automatic analysis system is configured as realizing that commanding elevation is analyzed according to the analysis object and scope of input;Commanding elevation automatic analysis system includes human-computer interaction module and analysis module, and analysis module includes the point position in space computing module, space buffer area analysis module and the result screening module that are sequentially connected.Advantage is:Realize commanding elevation automatically analyze, consistent Global localization, air-ground integration, indoor and outdoor integration, the technological break-through of the aspect such as interface and standard, so as to meet multi-level the police's application.
Description
Technical field
The invention belongs to police service Information System configuration technical field, it is related to three-dimensional geographic information platform, more particularly, to one
Plant the three-dimensional police geographical information platform automatically analyzed based on commanding elevation.
Background technology
Commanding elevation analysis is a great problem of guard's security work.In guard's security work, guard scene, guard live
Ground, the commanding elevation investigation on guard line periphery are always work problem.Traditional working mode is stepped on the spot to scene by people's police
The mode survey, investigated one by one is carried out.People's police detect by an unaided eye, hand-kept, due to the restriction of the factors such as weather condition, easily occur
Mistake, and waste time and energy.Current two-dimentional police geographical information platform is more ripe in the application of each public security department.Two dimension
GIS realizes the various functions related to police business substantially, such as:It is GIS map display function, map operation function, police
Figure function, display GPS police cars function, map inquiry and positioning function, drawing function etc..Although meeting public affairs to a certain extent
The daily management mission of peace department needs, but two-dimension GIS is the plane information that three-dimensional spatial information is mapped as two dimension, can not
Avoid it is excessively abstract in technique of expression, it is difficult to show the information such as humanity, environment, resource;Also lack for user and face
Field sense, does not meet the actual visual custom of people.Two-dimension GIS has office in terms of the intuitive that three-dimensional localization and information represent
Sex-limited, the construction demand accordingly, for three-dimension GIS arises at the historic moment.
In recent years, security department and police unit are increasingly subject to weight to three-dimensional visualization abroad with virtual reality technology
Depending on the country has also carried out a few thing in this respect, realizes map operation, venue information locating query, security and police
The function of comprehensive displaying of the business information on electronic three-dimensional map, system is very fast in B/S Client browse maps, higher
Ground meets the actual combat demand of system.At present, the construction of police three-dimensional geographic information platform is still in the starting stage, is keeping magnanimity
Browsing for threedimensional model be smooth, police on the Data Integration in existing public security two-dimentional system to three-dimensional scenic, by existing two dimension
GIS-Geographic Information System be integrated into three-dimensional police geographical information platform and for specific transactions (strictly according to the facts current population's information inquiry,
Police service simulated flight etc.) corresponding analysis and decision support module aspect is provided it need further development and improves.
The original intention that digital city occurs just is intended in virtual digital world really express real world, and
Targetedly demand of specialty analysis is carried out thereon and is applied, play the core decision supporting capability of geographic information data.Therefore, number
The target of word urban development, the necessarily information of carrying objective world as much as possible, the unlimited real simulating reality world.So
And, three-dimension GIS is developed so far, based on its application still is limited to browse with the visual presentation and roaming of city virtual scene.Study carefully
Its reason, is due to the limitation of conventional digital cybercity construction technology:Conventional digital cybercity construction, mainly using people
Work modeling, sample texture, the technological means of sampling textures, are the 3-d reproductions with the means realization for emulating to objective world,
Objective world cannot truly be simulated;And each administrative department of the city such as public security, municipal administration, planning, gardens is it is desirable that can be truly anti-
Reflect " full information " city model of city present situation.
Traditional commanding elevation analysis is the manpower view of the scene, and the time for not only needing is more, wastes the manpower of preciousness, and
Easily error.Above-mentioned conventional digital city threedimensional model does not possess tight Fundamentals of Mathematics, cannot be based on the conventional digital yet
City threedimensional model carries out commanding elevation analysis.To realize that Police Information strengthened research and integrated management level are improved constantly, carry
The GIS-Geographic Information System construction and management of the public business such as security administration high, police strength deployment, security guard, people have been carried out for a long time
Exploration, it is proposed that various solutions.For example, Chinese patent literature discloses a kind of numeral police based on cloud storage
With three-dimensional geographic information system [application number:201320055443.1], monitored by portable terminal, road monitoring terminal, security protection
Terminal, wireless communication networks, retrieval server, geographic information server, police data server composition, portable terminal, road
Road monitoring terminal, security protection monitoring terminal connection wireless communication networks, wireless communication networks connect geographic information server, police respectively
Use data server.Its advantage is embodied in:Compensate for the office of analyze data in the current routine information application system of public security organ
Sex-limited, spatial analysis functions and strong Visualization ability specific to comprehensive utilization geographical information technology make police service
Data message and spatial information combine together.By monitoring distribution situation and real time execution of the various police work elements in space
Situation, analyzes its inner link, reasonable disposition and scheduling resource, so as to improve quick response and the collaboration treatment of each police
Ability.Although such scheme improves the performance of three-dimensional geographic information system to a certain extent, its innovation is lifting three
Dimension GIS-Geographic Information System, still cannot fundamentally solve the technical problem that previously described commanding elevation automatically analyzes.Particularly
Three-dimensional scenic still mainly using technological means such as artificial modeling, sample texture, sampling textures, is realized with the means for emulating
To the 3-d reproduction of objective world, it is impossible to truly simulate objective world, the conventional digital urban construction pattern based on modeling by hand
Simulated using the city appearance of sampling, it is impossible to objective world is really showed, while lacking in interior construction spacing and space
The expression of things with contact, automatically analyzing for commanding elevation cannot be realized based on above-mentioned model.
The content of the invention
Regarding the issue above, the present invention provides a kind of can realize the automatic based on commanding elevation of commanding elevation analysis
The three-dimensional police geographical information platform of analysis.
To reach above-mentioned purpose, present invention employs following technical proposal:This is alert based on the three-dimensional that commanding elevation automatically analyzes
With geographical information platform, including three-dimensional Police Geographic Information System and the commanding elevation being connected on three-dimensional Police Geographic Information System
Automatic analysis system, wherein, described three-dimensional Police Geographic Information System is configured as fusion outdoor scene threedimensional model, selected builds
Thing inside modeling data, plane geography information and police information are built, described commanding elevation automatic analysis system is configured as basis
The analysis object and scope of input realize the commanding elevation analysis in three-dimensional Police Geographic Information System;Described commanding elevation is divided automatically
Analysis system includes human-computer interaction module and analysis module, and wherein human-computer interaction module is configured as input to analyze object and scope,
Described analysis module be configured as setting up in three-dimensional Police Geographic Information System the point position in space analyzed in object range with it is flat
The corresponding relation of face geography information is analyzed with realizing commanding elevation;Described analysis module includes that the point position in space being sequentially connected is calculated
Module, space buffer area analysis module and result screening module;Wherein point position in space computing module be configured to space from
Scatterplot is fitted the point position in space for being intercepted with face and calculating and ask for being analyzed in object range in three-dimensional Police Geographic Information System, described
Space buffer area analysis module is configured as setting up certain around entity according to the dotted line face entity of entity in analysis object range
To recognize radiation scope or disturbance degree of the entity to neighbouring entity, described result screening module is configured for the banded regions in region
It is that plane geography information is obtained in three-dimensional Police Geographic Information System according to the analysis result of space buffer area analysis module
Space reflection point position is filtering out commanding elevation.
Based on three-dimensional Police Geographic Information System merged outdoor scene threedimensional model, selected interior of building modeling data,
The threedimensional model with tight Fundamentals of Mathematics of plane geography information and police information, can make commanding elevation automatic analysis system point
The commanding elevation analyzed in object range in three-dimensional Police Geographic Information System is separated out, time and human resources are not only saved, and
And accuracy is high, it is worth with auxiliary very high.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described three-dimensional police geography
Information system includes inclining Aerial Photography measurement apparatus, travelling shot measurement apparatus near the ground, outdoor scene three-dimensional modeling subsystem, builds
Build information model subsystem, two-dimension GIS subsystem and police information subsystem, described inclination Aerial Photography measurement apparatus and near
Ground moving photogrammetric apparatus is connected with outdoor scene three-dimensional modeling subsystem, described outdoor scene three-dimensional modeling subsystem and building
Information model subsystem is connected with virtual reality urban information model construction system, described virtual reality urban information model
Constructing system, two-dimension GIS subsystem and police information subsystem are connected with multi-source fusion subsystem;Wherein described inclination is distant
Sense photogrammetric apparatus is configured as obtaining full-view image information and radar including at the top of the atural object including building and side
Point cloud information;It is near the ground complete including the atural object including building that described travelling shot measurement apparatus near the ground are configured as collection
Scape image information and radar points cloud information;Described outdoor scene three-dimensional modeling subsystem is configured as that Aerial Photography measurement dress will be inclined
Put with the information of travelling shot measurement apparatus near the ground merge and associate to create the outdoor scene threedimensional model of air-ground combination;It is described
BIM subsystem be configured as to select the space of interior of building, component, facilities and equipment three-dimensional modeling
With information integration obtaining selected interior of building modeling data;Described virtual reality urban information model construction system quilt
It is formulated as merging outdoor scene threedimensional model with selected interior of building modeling data obtaining virtual reality urban information model;
Described two-dimension GIS subsystem is configured as the plane geography information integration of the property, type and place name address to geographical space;
Described police information subsystem is configured to supply police information;Described multi-source fusion subsystem is configured as will be virtual existing
Real urban information model, plane geography information carry out data fusion and associate to obtain augmented reality urban information mould with police information
Type.
Take oblique photograph to measure, traverse measurement near the ground and the united technical schemes of BIM, realize threedimensional model with it is complete
The accurate superposition of scape image, and spatial scene is infiltrated into indoor and outdoor integrally, not only spatial relationships possess threedimensional model
Tight Fundamentals of Mathematics, and effectively compensate for missing of the aviation image for information such as bottom commerce, ground;Integrated fusion GIS numbers
According to by 2-D data 3D solid;The police information of integrated fusion, facilitates the inquiry of police information and transfers, and realizes shadow
The multi-source multi-class datas such as picture, scene, model and map vector, attribute data, police information are merged.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described three-dimensional police geography
Information system and commanding elevation automatic analysis system are connected with police vehicle analog subsystem, described human-computer interaction module also by
Input activity route and scope are configured to, described police vehicle analog subsystem is configured as simulation police vehicle in man-machine friendship
The movable route of mutual module input is up to be sailed, and described analysis module is configured as setting up in three-dimensional Police Geographic Information System alert
Point position in space and the corresponding relation of plane geography information in the range of police vehicle simulated with vehicle simulation subsystem are to realize
Analyze commanding elevation.It is up in the movable route that human-computer interaction module is input into using police vehicle analog subsystem simulation police vehicle
Sail, so as to realize dynamic commanding elevation analysis of the commanding elevation automatic analysis system in three-dimensional Police Geographic Information System.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described commanding elevation is divided automatically
Analysis system also includes coincidence scope import modul, and described coincidence scope import modul is connected with point position in space computing module, institute
The coincidence scope import modul stated is configured as the scope input space point position meter that will have been calculated by point position in space computing module
Module is calculated so that point position in space computing module directly calculates newly-increased scope.Coincidence scope import modul avoids point position in space meter
Calculate module computing repeatedly for computer capacity.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described inclination Aerial Photography
Measurement apparatus include flying platform and at least two aerial image collection cameras being arranged on flying platform, wherein at least one
Individual aerial image collection camera is set straight down, remaining the aerial shadow of aerial image collection camera to set straight down
As acquisition camera for axle is symmetrical arranged diagonally downward;Described flying platform is helicopter or unmanned plane, and described flight is put down
Platform is provided with five aerial image collection cameras, and one of them aerial image collection camera is set straight down, and remaining four
Individual aerial image collection camera is symmetrical arranged diagonally downward with the aerial image collection camera for setting straight down as axle.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described movement near the ground is taken the photograph
Shadow measurement apparatus include ground moving platform and the full-view image acquisition camera being arranged on ground moving platform;Described ground
Face mobile platform is provided with mounting seat, and described full-view image acquisition camera is rotated with mounting seat and is connected, set in mounting seat
There are the first motor that full-view image acquisition camera can be driven to rotate, the first described motor and first control circuit
It is connected, the first GPS module and some position sensors is connected with first control circuit, described position sensor is distributed in
The rotational angle peripheral and that full-view image acquisition camera can be detected of full-view image acquisition camera;On described flying platform
Pedestal is provided with, the aerial image collection camera for setting straight down is fixed with pedestal, end face is rotatably connected on pedestal
Fluted disc, the second motor that described contrate gear is rotated with energy Driving plane fluted disc, described contrate gear periphery is provided with
The annular seating on pedestal is fixed on, some cell bodies for radially extending are provided with annular seating, screw rod, institute are provided with described cell body
Being threaded with the screw rod stated can slide and the circumferentially positioned swivel nut seat in cell body along cell body, solid respectively on each swivel nut seat
An aerial image collection camera for setting diagonally downward is provided with, the Inner ends of described screw rod are respectively equipped with energy and contrate gear
Meshed gears, described aerial image collection camera and the second motor are connected and second with second control circuit
The second GPS module is connected with control circuit.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, the system uses LOD tiles
Data, when data volume is no more than TG, are carried out image by the data transfer mode support mass data of memory technology and data flow
Technology is compressed and calls in, by including the number including different resolution, different size of aerophotograph, satellite image, digital elevation model
Cut out according to by fusion, projective transformation and data, the true texture three-dimensional scenic of arbitrary resolution is fabricated to, so as to build ground
Graphic data collection, the level of detail of outdoor scene threedimensional model is classified, fusion different resolution and different pieces of information amount image and
Altitude data, and by Web Publishing, realize vector data, terrain data, the data stream transmitting of D models;When data volume exceedes
During TG, fast network transmission is realized using direct-connected mode, during loading data, vector data, terrain data, threedimensional model layering are adjusted
Enter, make the model in scene be both a visual entirety, can quickly run again.Successfully solve mass data and operational efficiency
Problem, and operation is flexible, and interoperability is stronger.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described multi-source fusion subsystem
System is connected with three-dimensional scenic analog subsystem, and described three-dimensional scenic analog subsystem covers special using screen space ambient light
Effect, if described three-dimensional scenic analog subsystem has including including flame, smog, skeleton cartoon, dynamic water surface, four seasons weather
Dry special efficacy picture, while sunshine is introduced, as system source, according to given date, time and time zone real-time adjustment light
Shadow, sets the color of mist, and using preset value or self-defined sky texture and color, dynamic cloud layer supports customization height, position, close
Degree and translational speed, support the solar irradiation effect in the simulating reality world, can be to including sunshine light source position, direction, light
It is adjusted in interior factor according to intensity.Threedimensional model build in a more real virtual environment, particle effect should
With enhancing bandwagon effect.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, described police information subsystem
System includes three-dimensional data, public security basic data, Online Video monitoring data, Municipal Component device data and thematic data, wherein
Public security basic data includes floating population's data, resident demographic data, emphasis demographic data, key unit's data;Municipal Component
Device data includes well lid data, street lamp data, litterbin data;Online Video monitoring data includes real-time video monitoring picture
Data, camera position data and camera status data;Thematic data includes thematic diagram data, road map data, road map
Data, place name address date, interest point data, Geo Spatial Data Framework;Three-dimensional data includes 3-dimensional image data, three-dimensional height
Number of passes evidence, three-dimensional modeling data, trivector data.
In the above-mentioned three-dimensional police geographical information platform automatically analyzed based on commanding elevation, the system uses three dimensions
Singulation is encoded, and directly sets up the logic figure layer of three dimensions, it is divided and is encoded, and using it as place name address language
The carrier that benefit film showing is penetrated, so as to digital geography definition space be mapped with objective reality space, and no longer remembers with place name address
Record entry and the binding of geography information entity elements, so as to ensure that the complete and continuity of definition space, and are no longer limited by
The GISization disposal status of place name address date;Described three dimensions singulation coding keeps the uniqueness and uniformity of coding,
On this basis, by the installation space particle level in coding, thick of obfuscation can be carried out to the space without perfect information
Grain coding record, while reserved the later stage become more meticulous again space divide with definition re-encoding interface.
Compared with prior art, the advantage of this three-dimensional police geographical information platform automatically analyzed based on commanding elevation is existed
In:Outdoor scene three-dimensional, the joint modeling of important building BIM, streetscape, and and use in conjunction integrated with GIS technology are realized, is built
Augmented reality three dimensional spatial scene, the technology for realizing the aspects such as consistent Global localization, air-ground integration, interface and standard is dashed forward
It is broken, so as to meet the multi-level the police's applications such as guard's security, anti-terrorism, command scheduling, basic unit basis;Overturn " pseudo- three-dimensional imitative
Pattern very ", takes outdoor scene to model the united solutions of+BIM, and spatial scene is infiltrated into indoor and outdoor integrally;Realize ground
Sky joint three-dimensional modeling, realize the accurate superposition of full-view image and threedimensional model, effectively make up aviation image for bottom commerce,
The missing problem of the information such as face;Merged in outdoor scene threedimensional model, selected building based on three-dimensional Police Geographic Information System
The threedimensional model with tight Fundamentals of Mathematics of portion's modeling data, plane geography information and police information, can make commanding elevation certainly
Dynamic analysis system analyzes the commanding elevation analyzed in three-dimensional Police Geographic Information System in object range, not only save the time and
Human resources, and accuracy is high, is worth with auxiliary very high.
Brief description of the drawings
Fig. 1 is the structured flowchart that the present invention is provided.
Fig. 2 is the structured flowchart of the three-dimensional Police Geographic Information System that the present invention is provided.
Fig. 3 is the part-structure schematic diagram of the travelling shot measurement apparatus near the ground that the present invention is provided.
Fig. 4 is the part-structure schematic diagram of the travelling shot measurement apparatus near the ground that the present invention is provided.
Fig. 5 is the part-structure schematic diagram of the inclination Aerial Photography measurement apparatus that the present invention is provided.
In figure, Aerial Photography measurement apparatus 1, flying platform 11, aerial image collection camera 12, pedestal 13, end are inclined
Face fluted disc 14, the second motor 15, annular seating 16, cell body 16a, screw rod 17, gear 17a, swivel nut seat 18, second control circuit
19th, the second GPS module 100, travelling shot measurement apparatus 2 near the ground, ground moving platform 21, full-view image acquisition camera
22nd, mounting seat 23, the first motor 24, first control circuit 25, the first GPS module 26, position sensor 27, outdoor scene are three-dimensional
Modeling subsystem 3, BIM subsystem 4, two-dimension GIS subsystem 5, police information subsystem 6, multi-source fusion subsystem
7th, three-dimensional Police Geographic Information System 71, police vehicle analog subsystem 72, three-dimensional scenic analog subsystem 8, commanding elevation are automatic
Analysis system 81, human-computer interaction module 82, analysis module 83, point position in space computing module 84, space buffer area analysis module 85,
As a result screening module 86, coincidence scope import modul 87, virtual reality urban information model construction system 9.
Specific embodiment
As shown in figure 1, the three-dimensional police geographical information platform for originally being automatically analyzed based on commanding elevation, including three-dimensional police geography
Information system 71 and the commanding elevation automatic analysis system 81 being connected on three-dimensional Police Geographic Information System 71, wherein, three-dimensional is alert
The geographical letter of fusion outdoor scene threedimensional model, selected interior of building modeling data, plane is configured as with GIS-Geographic Information System 71
Breath and police information, commanding elevation automatic analysis system 81 are configured as realizing that three-dimensional is police according to the analysis object and scope of input
Commanding elevation analysis in GIS-Geographic Information System 71;Commanding elevation automatic analysis system 81 includes human-computer interaction module 82 and analysis module
83, wherein human-computer interaction module 82 is configured as input to analyze object and scope, and analysis module 83 is configured as setting up three-dimensional police
It is high to realize system with the corresponding relation of plane geography information with the point position in space analyzed in GIS-Geographic Information System 71 in object range
Point analysis;Analysis module 83 includes the point position in space computing module 84, space buffer area analysis module 85 and the result that are sequentially connected
Screening module 86;Wherein point position in space computing module 84 is configured to spatial discrete points fitting and asks for three with face obstruct calculating
The point position in space in object range is analyzed in dimension Police Geographic Information System 71, space buffer area analysis module 85 is configured as root
The banded regions of certain area around entity are set up to recognize the entity to neighbour according to the dotted line face entity of entity in analysis object range
The radiation scope or disturbance degree of nearly entity, as a result screening module 86 be configured as the analysis according to space buffer area analysis module 85
Result obtains space reflection point position of the plane geography information in three-dimensional Police Geographic Information System 71 to filter out commanding elevation.
Outdoor scene threedimensional model, selected interior of building are merged based on three-dimensional Police Geographic Information System 71 and has modeled number
According to, plane geography information and the threedimensional model with tight Fundamentals of Mathematics of police information, can automatically analyze commanding elevation to be
System 81 analyzes the commanding elevation analyzed in object range in three-dimensional Police Geographic Information System 71, not only saves time and manpower
Resource, and accuracy is high, is worth with auxiliary very high.
Three-dimensional Police Geographic Information System 71 and commanding elevation automatic analysis system 81 with police vehicle analog subsystem 72
It is connected, human-computer interaction module 82 is additionally configured to input activity route and scope, and police vehicle analog subsystem 72 is configured as
Simulation police vehicle is sailed the movable route that human-computer interaction module 82 is input into is up, and analysis module 83 is configured as setting up three-dimensional police
With point position in space and plane earth in the range of the police vehicle of the simulation of police vehicle analog subsystem 72 in GIS-Geographic Information System 71
The corresponding relation of reason information is analyzed with realizing commanding elevation;Commanding elevation automatic analysis system 81 also includes coincidence scope import modul
87, coincidence scope import modul 87 is connected with point position in space computing module 84, and coincidence scope import modul 87 is configured as
By the scope input space calculation of points module 84 of the calculating of point position in space computing module 84 so that point position in space computing module 84
Directly calculate newly-increased scope.It is input into human-computer interaction module 82 using the simulation police vehicle of police vehicle analog subsystem 72
Movable route is up to be sailed, so as to realize dynamic system of the commanding elevation automatic analysis system 81 in three-dimensional Police Geographic Information System 71
Point analysis high, the setting of coincidence scope import modul 87 then avoids weight of the point position in space computing module 84 for computer capacity
It is multiple to calculate.
As shown in Fig. 2 three-dimensional Police Geographic Information System 71 includes inclining Aerial Photography measurement apparatus 1, movement near the ground
Photogrammetric apparatus 2, outdoor scene three-dimensional modeling subsystem 3, BIM subsystem 4, two-dimension GIS subsystem 5 and police letter
Breath subsystem 6, described inclination Aerial Photography measurement apparatus 1 and travelling shot measurement apparatus 2 near the ground are built with outdoor scene three-dimensional
Mold system 3 is connected, described outdoor scene three-dimensional modeling subsystem 3 and BIM subsystem 4 with virtual reality city
Information model constructing system 9 is connected, described virtual reality urban information model construction system 9, two-dimension GIS subsystem 5 and alert
It is connected with multi-source fusion subsystem 7 with information subsystem 6;Wherein described inclination Aerial Photography measurement apparatus 1 are configured as
Obtain full-view image information and radar points cloud information including at the top of the atural object including building and side;Described shifting near the ground
Dynamic photogrammetric apparatus 2 is configured as collection to be believed including the atural object full-view image information near the ground including building and radar points cloud
Breath;Described outdoor scene three-dimensional modeling subsystem 3 is configured as that Aerial Photography measurement apparatus 1 will be inclined and travelling shot near the ground is surveyed
Measuring the information of device 2 carries out fusion association to create the outdoor scene threedimensional model of air-ground combination.Specifically, outdoor scene three-dimensional modeling subsystem
System 3 is configured to the technological synthesis applications such as POS auxiliary, DSM guiding, resistance to deformation moment preserving characteristic matching and is taken the photograph remote sensing is inclined
Shadow measurement apparatus 1 carry out fusion and associate to create the outdoor scene three of air-ground combination with the information of travelling shot measurement apparatus 2 near the ground
Dimension module.BIM subsystem 4 is configured as space, component, the three of facilities and equipment to the interior of building selected
Dimension is modeled with information integration to obtain selected interior of building modeling data;Described virtual reality urban information model construction
System 9 is configured to merge outdoor scene threedimensional model with selected interior of building modeling data obtain virtual reality city letter
Breath model;The plane that described two-dimension GIS subsystem 5 is configured as the property, type and place name address to geographical space is geographical
Information integration;Described police information subsystem 6 is configured to supply police information;Described multi-source fusion subsystem 7 is matched somebody with somebody
To be set to carry out data fusion by virtual reality urban information model, plane geography information and police information and associate and showed with obtaining enhancing
Real urban information model.
Multi-source fusion subsystem 7 is fitted by the spatial discrete points of outdoor scene threedimensional model and asks for outdoor scene three with face obstruct calculating
Dimension module point position, then analyzed and result Filtering system by space buffer, obtain two-dimension GIS data in outdoor scene threedimensional model
Space reflection point, so as to set up the corresponding relation of outdoor scene threedimensional model and two-dimension GIS data, two-dimension GIS data are included in two dimension
In the plane geography information of GIS subsystems 5.Take oblique photograph measurement, traverse measurement near the ground and the united technical sides of BIM
Case, realizes the accurate superposition of threedimensional model and full-view image, and spatial scene is infiltrated into indoor and outdoor integrally, threedimensional model
Not only spatial relationships possess tight Fundamentals of Mathematics, and effectively compensate for aviation image for information such as bottom commerce, ground
Missing;Integrated fusion GIS data, by 2-D data 3D solid;The police information of integrated fusion, facilitates police information
Inquire about and transfer, realize melting for the multi-source multi-class data such as image, scene, model and map vector, attribute data, police information
Close.
Wherein, police information subsystem 6 includes three-dimensional data, public security basic data, Online Video monitoring data, city portion
Part device data and thematic data, wherein public security basic data are mainly biradical survey data, including floating population's data, resident
Demographic data, emphasis demographic data, key unit's data;Municipal Component device data includes well lid data, street lamp data, pericarp
Case data;Online Video monitoring data includes real-time video monitoring picture data, camera position data and camera status number
According to;Thematic data includes thematic diagram data, road map data, street diagram data, place name address date, interest point data, geography
Spatial frame data;Three-dimensional data includes 3-dimensional image data, three-dimensional elevation data, three-dimensional modeling data, trivector data.
As shown in Figure 2-5, inclining Aerial Photography measurement apparatus 1 includes flying platform 11 and is arranged on flying platform 11
At least two aerial image collection cameras 12, the aerial image collection camera 12 of wherein at least one is set straight down, its
Remaining aerial image collection camera 12 is with the aerial image collection camera 12 that sets straight down for axle symmetrically sets diagonally downward
Put.Preferably, flying platform 11 is helicopter or unmanned plane, and flying platform 11 is provided with five aerial image collection cameras
12, one of them aerial image collection camera 12 is set straight down, and remaining four aerial image collection cameras 12 are with perpendicular
Straight down-set aerial image collection camera 12 is symmetrical arranged diagonally downward for axle, for convenience images match and data meter
Calculate, angle of inclination is 30 ° or 45 ° or 60 °.As Figure 1-4, travelling shot measurement apparatus 2 near the ground are flat including ground moving
Platform 21 and the full-view image acquisition camera 22 being arranged on ground moving platform 21.
Specifically, ground moving platform 21 is provided with mounting seat 23, described full-view image acquisition camera 22 and installation
Seat 23 rotates connection, and the first motor 24 that full-view image acquisition camera 22 can be driven to rotate is provided with mounting seat 23,
The first described motor 24 is connected with first control circuit 25, and the first GPS module is connected with first control circuit 25
26 and some position sensors 27, described position sensor 27 is distributed in the periphery of full-view image acquisition camera 22 and can examine
Survey the rotational angle of full-view image acquisition camera 22;Described flying platform 11 is provided with pedestal 13, is fixed with pedestal 13
The aerial image collection camera 12 for setting straight down, is rotatably connected to contrate gear 14, described end face on pedestal 13
The second motor 15 that fluted disc 14 is rotated with energy Driving plane fluted disc 14, the described periphery of contrate gear 14 is provided with and is fixed on base
Annular seating 16 on seat 13, is provided with some cell body 16a for radially extending on annular seating 16, and spiral shell is provided with described cell body 16a
Bar 17, being threaded with described screw rod 17 can slide and the circumferentially positioned swivel nut seat 18 in cell body 16a along cell body 16a,
An aerial image collection camera 12 for setting diagonally downward is installed with respectively on each swivel nut seat 18, described screw rod 17
Inner ends are respectively equipped with can be driven with the meshed gears 17a of contrate gear 14, described aerial image collection camera 12 and second
Motor 15 is connected with second control circuit 19 and is connected with the second GPS module 100 on second control circuit 19.
The system works as data volume using the data transfer mode support mass data of LOD tiles memory technology and data flow
During no more than 100TG, data are carried out compression of images and to call in technology, will including different resolution, different size of aerophotograph, defend
Star image, digital elevation model are cut out in interior data by fusion, projective transformation and data, are fabricated to arbitrary resolution
True texture three-dimensional scenic, so as to build terrain data collection, the level of detail of outdoor scene threedimensional model is classified, and fusion is different
The image and altitude data of resolution ratio and different pieces of information amount, and by Web Publishing, realize vector data, terrain data, 3D moulds
The data stream transmitting of type;When data volume is more than 100TG, fast network transmission is realized using direct-connected mode, during loading data, arrow
Amount data, terrain data, threedimensional model layering are called in, and make the model in scene be both a visual entirety, can quickly be transported again
OK.Mass data and operational efficiency are successfully solved the problems, such as, and operation is flexible, and interoperability is stronger.
In Fig. 2, multi-source fusion subsystem 7 is connected with three-dimensional scenic analog subsystem 8, and three-dimensional scenic analog subsystem 8 is adopted
Special efficacy is covered with screen space ambient light, three-dimensional scenic analog subsystem 8 has includes flame, smog, skeleton cartoon, Dynamic Water
Face, four seasons weather are in interior some special efficacy pictures, while sunshine is introduced, as system source, according to given date, time
With time zone real-time adjustment shadow, the color of mist is set, using preset value or self-defined sky texture and color, dynamic cloud layer is supported
Customization height, position, density and translational speed, support the solar irradiation effect in the simulating reality world, can be to including sunshine
Light source position, direction, intensity of illumination are adjusted in interior factor.Threedimensional model is built in a more real virtual environment
In, the application of particle effect enhances bandwagon effect.
The system is encoded using three dimensions singulation, directly sets up the logic figure layer of three dimensions, and it is divided
With coding, and using it as the carrier of place name address Semantic mapping, so as to by digital geography definition space and objective reality space
Mapped, and entry and the binding of geography information entity elements are no longer recorded with place name address, so as to ensure that definition space
Completely and continuity, and the GISization disposal status for being no longer limited by place name address date;Three dimensions singulation coding keeps
The uniqueness and uniformity of coding, on this basis, by the installation space particle level in coding, to no perfect information
Space can carry out obfuscation it is coarse grained coding record, while reserved the later stage become more meticulous again space divide with define compile again
Code interface.
The system includes following functions plate:Level Four patrol plate, infrastructure plate, pay close attention to plate, Jing Weisha
Plate block, BIM application plates, query statistic plate, system administration plate.
Wherein level Four patrol plate includes level Four patrol monitor in real time, reacting ring, anti-terrorism keypoint part and sentry box, and level Four is patrolled
Anti- monitor in real time can choose control display and hiding level Four patrol, patrol car, micro- police service, car of handling a case, intercom, and can be displayed in
Line number amount and summation;Reacting ring can choose control display and hide, and show that the police arrive in correspondence reacting ring and taken in real time
Between;Anti-terrorism keypoint part and sentry box can choose relevant position control display and hide.
Wherein infrastructure plate includes monitoring and other facilities, and monitoring can be recalled and be carried out Real Time Observation with selective
And playing back videos;Other facilities include that inspection well cover, light pole, dustbin, overline bridge subway, Internet bar, hotel, bicycle are rented
Rent, bus stop, public lavatory, payphone, mailbox and steel tower.
Wherein paying close attention to plate includes emphasis personnel, emphasis article, key unit, emphasis place, emphasis route, emphasis
Region and corridor are long, and emphasis personnel can choose and be shown with red icon on map, and it is right that click list can be navigated to
Position is answered, house where it is highlighted, and double-click can be with show staff's details;Emphasis article can choose control display and
Hide, emphasis article includes controlled knife, inflammable and explosive, civilian gun etc.;Key unit can choose control display and hide,
Key unit is including water power coal gas gas station etc.;Emphasis place can choose control display and hide, and emphasis place includes being closed
Note Hotel Buildings etc., drop-down list can click on positioning;Emphasis route can choose control display and hide, and double-click drop-down list
Route name can carry out viewshed analysis to it;Key area can choose control display and hide;Corridor is long can be chosen
Shown with green icon on map, clicking on list can navigate to correspondence position, and house where it is highlighted, and double-click
Can be with show staff's details.
Wherein guard's sand table plate includes effect displaying, addition scheme, project management, scheme and watch bill, camera point
Analysis, the dynamic ken, the internal control of emphasis place, effect displaying can be to store the scheme disposed in drop-down list, click can be played
Scheme is demonstrated, and " display is all " in the analysis result framework upper left corner, three-dimensional scenic will jump to show the visual angle of all commanding elevations;Add
Plus scheme can add mark picture, addition face mark, line mark, label character etc., the scheme finished according to region and along the line
It is stored in drop-down list;Project management can inquire the scheme of current addition, can carry out deletion action;Scheme and on duty
Table can inquire about same day operator on duty and conventional operator on duty;Camera analysis can show that institute's frame selects the monitoring of camera
Scope;The dynamic ken can select the road to carry out dynamic viewshed analysis etc. on map;The internal control of emphasis place can select correspondence
Node, it is that may bring up monitoring camera to double-click monitoring place.
Wherein BIM application plates exhibition building inside and outer spatial configuration, carry out map label and show, position and guard
Security prediction scheme makes, stores, transferring the functions such as broadcasting.
Wherein query statistic plate includes clicking on inquiry, inquiry of registering one's residence, comprehensive inquiry, frame choosing inquiry, intelligent search, a key
Search, clicks on permanent resident population, floating population, emphasis personnel, unit and unit work that inquiry can be inquired under current building
Make the list information of personnel, double-clicking lists of persons can eject personnel's details;Inquiry of registering one's residence can specifically inquire each household
Personnel's concrete condition;Comprehensive inquiry can inquire house situation and population situation;Frame choosing inquiry can choose different looking into
Type is ask, including 110, cruiser, micro- police service, PTU, PDT, camera, inspection well cover, street lamp and dustbin and building etc., point
Hit and inquire about the drawing area in three-dimensional page, the project that right button is chosen after terminating in result centralized displaying, and in statistics
Middle to show the situation that the site polling is arrived, the project clicked in result set can check Verbose Listing, click on the entry in list
Position can be navigated to;The information of intelligent search condition query personnel, building, infrastructure according to selected by, clicks on result
List can eject details;One-touch search permanent resident population, floating population, emphasis personnel, expatriate, Stall according to selected by
One grade, the Auto-matching querying condition such as policeman's information, show the results list.
Wherein system administration plate includes data management, priority assignation, user management, space measurement, coded query, quick
Menu, data management can carry out additions and deletions and change to look into the data of the building in database, unit, population, retail shop, wherein population bag
Permanent resident population and floating population are included, unit includes unit list and unit details and working unit personal information, and retail shop includes
Retail shop's list and retail shop's staff's details;Priority assignation can allow management to set difference in functionality authority to domestic consumer;
User management can allow keeper user is carried out additions and deletions change look into and password reset etc.;Space measurement can be with any in measurement space
Point obtain distance, the discrepancy in elevation and the gradient, while can be used to measure horizontal range and height;Coded query can be according to correspondence code
Carry out screening Query Result and additions and deletions can be carried out to it change to look into;Shortcut menu has filtered out some function menus according to common function
It is arranged in shortcut menu column.
Specific embodiment described herein is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from spirit of the invention or surmount scope defined in appended claims.
Although more having used inclination Aerial Photography measurement apparatus 1, flying platform 11, aerial image collection to image herein
First 12, pedestal 13, contrate gear 14, the second motor 15, annular seating 16, cell body 16a, screw rod 17, gear 17a, swivel nut seat
18th, second control circuit 19, the second GPS module 100, travelling shot measurement apparatus 2 near the ground, ground moving platform 21, panorama
Image collection camera 22, mounting seat 23, the first motor 24, first control circuit 25, the first GPS module 26, position are passed
Sensor 27, outdoor scene three-dimensional modeling subsystem 3, BIM subsystem 4, two-dimension GIS subsystem 5, police information subsystem
6th, multi-source fusion subsystem 7, three-dimensional Police Geographic Information System 71, police vehicle analog subsystem 72, three-dimensional scenic analog submodule
System 8, commanding elevation automatic analysis system 81, human-computer interaction module 82, analysis module 83, point position in space computing module 84, space
Buffer zone analysis module 85, result screening module 86, coincidence scope import modul 87, virtual reality urban information model construction system
Unite 9 grade terms, but be not precluded from using the possibility of other terms.Using these terms just for the sake of more easily description and
Explain essence of the invention;Any additional limitation is construed as all to be disagreed with spirit of the present invention.
Claims (10)
1. a kind of three-dimensional police geographical information platform automatically analyzed based on commanding elevation, it is characterised in that including three-dimensional policely
Reason information system (71) and the commanding elevation automatic analysis system (81) being connected on three-dimensional Police Geographic Information System (71), its
In, described three-dimensional Police Geographic Information System (71) is configured as fusion outdoor scene threedimensional model, selected interior of building and builds
Modulus evidence, plane geography information and police information, described commanding elevation automatic analysis system (81) are configured as according to input
Analysis object and scope realize the commanding elevation analysis in three-dimensional Police Geographic Information System (71);Described commanding elevation automatically analyzes
System (81) includes human-computer interaction module (82) and analysis module (83), and wherein human-computer interaction module (82) is configured as input to point
Analysis object and scope, described analysis module (83) are configured as setting up analysis object in three-dimensional Police Geographic Information System (71)
In the range of the corresponding relation of point position in space and plane geography information analyzed with realizing commanding elevation;Described analysis module (83) bag
Include point position in space computing module (84), space buffer area analysis module (85) and the result screening module (86) being sequentially connected;Its
Hollow calculation of points module (84) is configured to spatial discrete points fitting and asks for three-dimensional police geography with face obstruct calculating
Point position in space in information system (71) in analysis object range, described space buffer area analysis module (85) is configured as root
The banded regions of certain area around entity are set up to recognize the entity to neighbour according to the dotted line face entity of entity in analysis object range
The radiation scope or disturbance degree of nearly entity, described result screening module (86) are configured as according to space buffer area analysis module
(85) analysis result obtains space reflection point position of the plane geography information in three-dimensional Police Geographic Information System (71) to sieve
Select commanding elevation.
2. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to claim 1, it is characterised in that
Described three-dimensional Police Geographic Information System (71) is including inclining Aerial Photography measurement apparatus (1), travelling shot near the ground measurement
Device (2), outdoor scene three-dimensional modeling subsystem (3), BIM subsystem (4), two-dimension GIS subsystem (5) and police letter
Breath subsystem (6), described inclination Aerial Photography measurement apparatus (1) and travelling shot measurement apparatus near the ground (2) are and outdoor scene
Three-dimensional modeling subsystem (3) is connected, described outdoor scene three-dimensional modeling subsystem (3) and BIM subsystem (4) with
Virtual reality urban information model construction system (9) is connected, described virtual reality urban information model construction system (9), two
Dimension GIS subsystems (5) and police information subsystem (6) are connected with multi-source fusion subsystem (7);Wherein described inclination remote sensing
Photogrammetric apparatus (1) is configured as obtaining full-view image information and radar including at the top of the atural object including building and side
Point cloud information;Described travelling shot measurement apparatus (2) near the ground are configured as collection including the atural object near-earth including building
Face full-view image information and radar points cloud information;Described outdoor scene three-dimensional modeling subsystem (3) is configured as taking the photograph inclination remote sensing
Shadow measurement apparatus (1) carry out fusion and associate to create the reality of air-ground combination with the information of travelling shot measurement apparatus (2) near the ground
Scape threedimensional model;Described BIM subsystem (4) be configured as to select the space of interior of building, component,
The three-dimensional modeling of facilities and equipment and information integration are obtaining selected interior of building modeling data;Described virtual reality city
Information model constructing system (9) is configured to merge to obtain with selected interior of building modeling data by outdoor scene threedimensional model
Virtual reality urban information model;Described two-dimension GIS subsystem (5) is configured as property to geographical space, type and ground
The plane geography information integration of name address;Described police information subsystem (6) is configured to supply police information;Described is more
Merge subsystem (7) and be configured as virtual reality urban information model, plane geography information and police information carrying out data in source
Fusion associates to obtain augmented reality urban information model.
3. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to claim 2, it is characterised in that
Described three-dimensional Police Geographic Information System (71) and commanding elevation automatic analysis system (81) with police vehicle analog subsystem
(72) it is connected, described human-computer interaction module (82) is additionally configured to input activity route and scope, described police vehicle mould
Intend subsystem (72) and be configured as simulation police vehicle to sail the movable route that human-computer interaction module (82) is input into is up, it is described
Analysis module (83) is configured as setting up police vehicle analog subsystem (72) simulation in three-dimensional Police Geographic Information System (71)
Police vehicle in the range of the corresponding relation of point position in space and plane geography information analyzed with realizing commanding elevation.
4. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to claim 3, it is characterised in that
Described commanding elevation automatic analysis system (81) also includes coincidence scope import modul (87), described coincidence scope import modul
(87) it is connected with point position in space computing module (84), described coincidence scope import modul (87) is configured as by space
Scope input space calculation of points module (84) that calculation of points module (84) is calculated is so that point position in space computing module (84) is straight
Connect and calculate newly-increased scope.
5. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to Claims 2 or 3 or 4, it is special
Levy and be, described inclination Aerial Photography measurement apparatus (1) is including flying platform (11) and is arranged on flying platform (11)
At least two aerial image collection cameras (12), the aerial image collection camera (12) of wherein at least one sets straight down
Put, remaining aerial image collection camera (12) is with the aerial image collection camera (12) that sets straight down for axle is tilted towards
Under be symmetrical arranged;Described flying platform (11) is helicopter or unmanned plane, and described flying platform (11) is provided with five skies
Middle image collection camera (12), one of them aerial image collection camera (12) is set straight down, and remaining four aerial
Image collection camera (12) is with the aerial image collection camera (12) that sets straight down for axle is symmetrical arranged diagonally downward.
6. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to claim 5, it is characterised in that
It is described that travelling shot measurement apparatus (2) near the ground are including ground moving platform (21) and are arranged on ground moving platform (21)
Full-view image acquisition camera (22);Described ground moving platform (21) is provided with mounting seat (23), described panorama shadow
It is connected as acquisition camera (22) is rotated with mounting seat (23), being provided with mounting seat (23) can drive full-view image to gather shooting
The first motor (24) that head (22) is rotated, described the first motor (24) is connected with first control circuit (25),
The first GPS module (26) and some position sensors (27), described position sensor are connected with first control circuit (25)
(27) periphery for being distributed in full-view image acquisition camera (22) and the angle of rotation that full-view image acquisition camera (22) can be detected
Degree;Described flying platform (11) is provided with pedestal (13), and being fixed with the aerial image that sets straight down in pedestal (13) adopts
Collection camera (12), is rotatably connected to contrate gear (14), described contrate gear (14) and energy drive end on pedestal (13)
The second motor (15) that face fluted disc (14) is rotated, described contrate gear (14) periphery is provided with and is fixed on pedestal (13)
Annular seating (16), is provided with some cell bodies (16a) for radially extending on annular seating (16), and spiral shell is provided with described cell body (16a)
Bar (17), be threaded with described screw rod (17) to slide and the circumferentially positioned spiral shell in cell body (16a) along cell body (16a)
Block set (18), an aerial image collection camera (12) for setting diagonally downward is installed with each swivel nut seat (18) respectively,
The Inner ends of described screw rod (17) are respectively equipped with can adopt with contrate gear (14) meshed gears (17a), described aerial image
Collection camera (12) and the second motor (15) are connected and on second control circuit (19) with second control circuit (19)
It is connected with the second GPS module (100).
7. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to Claims 2 or 3 or 4, it is special
Levy and be, the system using LOD tiles memory technology and data flow data transfer mode support mass data, when data volume not
During more than 100TG, data are carried out into compression of images and technology is called in, will be including different resolution, different size of aerophotograph, satellite
Image, digital elevation model are cut out in interior data by fusion, projective transformation and data, are fabricated to arbitrary resolution true
Essence sense three-dimensional scenic, so as to build terrain data collection, the level of detail of outdoor scene threedimensional model is classified, different points of fusion
The image and altitude data of resolution and different pieces of information amount, and by Web Publishing, realize vector data, terrain data, 3D models
Data stream transmitting;When data volume is more than 100TG, fast network transmission is realized using direct-connected mode, during loading data, vector
Data, terrain data, threedimensional model layering are called in, and make the model in scene be both a visual entirety, can quickly be run again.
8. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to claim 7, it is characterised in that
Described multi-source fusion subsystem (7) is connected with three-dimensional scenic analog subsystem (8), described three-dimensional scenic analog subsystem
(8) using screen space ambient light masking special efficacy, described three-dimensional scenic analog subsystem (8) is with including flame, smog, bone
Bone animation, dynamic water surface, four seasons weather are in interior some special efficacy pictures, while sunshine is introduced, used as system source, foundation is given
Fixed date, time and time zone real-time adjustment shadow, set the color of mist, using preset value or self-defined sky texture and face
Color, dynamic cloud layer supports customization height, position, density and translational speed, supports the solar irradiation effect in the simulating reality world,
Can be to being adjusted including the factor including sunshine light source position, direction, intensity of illumination.
9. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to Claims 2 or 3 or 4, it is special
Levy and be, described police information subsystem (6) includes three-dimensional data, public security basic data, Online Video monitoring data, city
Components/devices data and thematic data, wherein public security basic data include floating population's data, resident demographic data, emphasis personnel
Data, key unit's data;Municipal Component device data includes well lid data, street lamp data, litterbin data;Online Video is supervised
Control data include real-time video monitoring picture data, camera position data and camera status data;Thematic data includes special
Topic diagram data, road map data, street diagram data, place name address date, interest point data, Geo Spatial Data Framework;It is three-dimensional
Data include 3-dimensional image data, three-dimensional elevation data, three-dimensional modeling data, trivector data.
10. the three-dimensional police geographical information platform automatically analyzed based on commanding elevation according to Claims 2 or 3 or 4, it is special
Levy and be, the system using three dimensions singulation encode, directly set up the logic figure layer of three dimensions, it is carried out divide with
Coding, and using it as the carrier of place name address Semantic mapping, so as to digital geography definition space be entered with objective reality space
Row mapping, and entry and the binding of geography information entity elements are no longer recorded with place name address, so as to ensure that the complete of definition space
Whole and continuity, and no longer it is limited by the GISization disposal status of place name address date;Described three dimensions singulation coding
The uniqueness and uniformity of coding are kept, on this basis, by the installation space particle level in coding, to without perfect letter
The space of breath can carry out obfuscation it is coarse grained coding record, while reserved the later stage become more meticulous again space divide with definition
Re-encoding interface.
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