CN109584364A - A kind of generation method and device of the 2.5 dimension electronic maps based on inclination threedimensional model - Google Patents
A kind of generation method and device of the 2.5 dimension electronic maps based on inclination threedimensional model Download PDFInfo
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Abstract
The present invention provides generation methods and device that electronic maps are tieed up in a kind of 2.5 based on inclination threedimensional model, by constructing threedimensional model scene based on large scale inclination threedimensional model, digital orthoimage, digital elevation model, and it is aided with acquisition geomorphological features entity attribute information on the spot, rendering processing is carried out to existing three-dimensional scenic and generates 2.5 dimension electronic maps.Map rectification is carried out to generated 2.5 dimension map and the later period beautifies, while generating hot-zone data, link correlation attribute information based on entity information acquisition data.Electronic map is carried out to cut processing according to pre-production good serial display scale ruler map tile Parameter File to improve the response speed of Map Services.The map that the present invention generates is capable of forming reference information abundant to clearly distinguish atural object, shows the entity in city.
Description
Technical field
The present invention relates to GIS-Geographic Information System and survey fields, and in particular to a kind of 2.5 dimensions based on inclination threedimensional model
The generation method and device of electronic map.
Background technique
Digital city is to be loaded with the related urban information such as Urban Natural Resources, social resources, infrastructure, humanity, economy
Spatial information construct virtual platform, digital city construction is able to achieve comprehensive analysis and effective use to urban information, improves
City management efficiency economizes on resources, promotes the sustainable development of the city.Three-dimensional digital city model construction is current Surveying and Mapping Industry one
The important geographic information data production task of item.The three-dimensional modeling at initial stage is mainly with simulation modelling, half simulation modelling, measurement modeling
Based on, a wide range of three-dimensional digital city model production is realized with Aerial Photogrammetry.
In the prior art, traditional space bit confidence just taken the photograph aeroplane photography method, be only capable of obtaining atural object is generallyd use
Breath and top surface texture information, atural object side grain information then need to make an on-the-spot survey acquisition acquisition of taking pictures on the spot.
Present invention applicant is in implementing the present invention, it may, discovery at least has the following technical problems in the prior art:
The foundation for just penetrating aeroplane photography threedimensional model is only capable of acquisition atural object top surface and just penetrates texture information, the atural object side in model
Face information need to shoot atural object texture, storage on the spot, then carry out patch processing in software, working strength is very big, and there are people
For patch error.Two-dimensional electron map or three is generated in addition, being typically based in existing method and just taking the photograph aeroplane photography threedimensional model
Tie up electronic map, wherein Two-dimensional electron map is not able to satisfy information-based increasingly developed demand, and full three-dimensional map data amount
Greatly, high to network transfer speeds requirement, it is not easy to the use to three-dimensional map.
It follows that the technical problem that method in the prior art is big there are heavy workload and three-dimensional map data amount.
Summary of the invention
In view of this, the present invention provides it is a kind of based on inclination threedimensional model 2.5 dimension electronic maps generation method and
Device, to solve or at least partly solve method in the prior art there are heavy workload and three-dimensional map data amount are big
The technical issues of.
In order to solve the above-mentioned technical problem, first aspect present invention provides a kind of 2.5 dimensions based on inclination threedimensional model
The generation method of electronic map, comprising:
Step S1: inclination threedimensional model, digital orthoimage and digital elevation mould are established according to oblique aerial photography data
Type；
Step S2: being based on the inclination threedimensional model, digital orthoimage and digital elevation model, constructs threedimensional model field
Scape；
Step S3: acquisition entity information, wherein the block divided using the digital orthoimage as base map is believed as entity
Cease the working base map of acquisition；
Step S4: carrying out block division to the threedimensional model scene, and corresponding scene angle is arranged according to the block of division
Then degree carries out the image rendering achievement that rendering generates each block according to the block of division and the scene angle of setting, then will
The image rendering achievement of each block is spliced, and spliced electronic map is obtained；
Step S5: color adjustment, abnormal texture amendment are carried out to the spliced electronic map, and combine the reality of acquisition
Body information handles the entity for including in electronic map, the electronic map after obtaining landscaping treatment, wherein in electronic map
The entity for including includes road network, water system, greening, massif, vegetation.
In one embodiment, after step s 5, the method also includes step S6:
Projection correction is carried out to electronic map after splicing based on digital orthoimage, so that electronic map and digital orthogonal projection
As fitting.
In one embodiment, after step S6, the method also includes step S7 and step S8:
Step S7: the entity letter of 2.5 dimension electronic maps and step S3 acquisition after the landscaping treatment obtained based on step S5
Breath sketches out the profile of each atural object element, and increases corresponding attribute to each atural object element, generates hot-zone data；
Step S8: in conjunction with the attribute of the step S7 hot-zone data obtained and element, according to the series display ratio of pre-production
Example ruler map tile Parameter File and parameter preset, carry out the electronic map after landscaping treatment to cut processing.
In one embodiment, the entity information acquired in step S3 includes terrestrial object information and terrain object attribute information,
Middle terrestrial object information includes: building, road, river, bus station, communal facility, one or more, the terrain object attribute packet in park
Include one of title, position, direction, structure, trend, width or a variety of.
In one embodiment, after step S3 acquires entity information, further includes:
It takes pictures to entity, and photo is stored.
In one embodiment, the organizational form of the map tile Parameter File in step S8 uses data set, layer, row
Bibliographic structure is retouched, and parameter preset includes map drawing scale bar, map plane coordinate system, height datum, projection pattern, divides
Resolution.
In one embodiment, scene angle includes pitch angle and yaw angle.
Based on same inventive concept, second aspect of the present invention provides a kind of 2.5 dimension electricity based on inclination threedimensional model
The generating means of sub- map, comprising:
Module is established, for establishing inclination threedimensional model, digital orthoimage and number according to oblique aerial photography data
Elevation model；
Module is constructed, for being based on the inclination threedimensional model, digital orthoimage and digital elevation model, building is three-dimensional
Model scene；
Acquisition module, for acquiring entity information, wherein the block divided using the digital orthoimage as base map as
The working base map of entity information acquisition；
Rendering module is arranged corresponding for carrying out block division to the threedimensional model scene according to the block of division
Scene angle, then according to the block of division and the scene angle of setting carry out rendering generate the image rendering of each block at
Fruit, then the image rendering achievement of each block is spliced, obtain spliced electronic map；
Beautify module, for carrying out color adjustment, abnormal texture amendment to the spliced electronic map, and combines and adopt
The entity information of collection handles the entity for including in electronic map, the electronic map after obtaining landscaping treatment, wherein electronics
The entity for including in map includes road network, water system, greening, massif, vegetation.
It in one embodiment, further include generation module and cutting module,
Wherein, generation module is used for: the entity letter of 2.5 dimension electronic maps after the landscaping treatment based on acquisition and acquisition
Breath sketches out the profile of each atural object element, and increases corresponding attribute to each atural object element, generates hot-zone data；
It cuts module to be used for: in conjunction with the hot-zone data of acquisition and the attribute of element, according to the series display ratio of pre-production
Example ruler map tile Parameter File and parameter preset, carry out the electronic map after landscaping treatment to cut processing.
Based on same inventive concept, third aspect present invention provides a kind of computer readable storage medium, deposits thereon
Computer program is contained, which, which is performed, realizes method described in first aspect.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects
Fruit:
The invention proposes the generation method that electronic maps are tieed up in a kind of 2.5 based on inclination threedimensional model, basis first is inclined
Loxodrome sky photographed data establishes inclination threedimensional model, digital orthoimage and digital elevation model, then constructs threedimensional model field
Scape acquires entity information, then carries out rendering to the threedimensional model scene and obtains spliced electronic map；Again to the spelling
Electronic map landscaping treatment after connecing generates 2.5 dimension electronic maps.It is three-dimensional based on aeroplane photography is just penetrated in compared with the existing technology
Model shoots the workload of atural object texture, storage can greatly reduce for generating 3 dimension electronic maps on the spot, and can subtract
Error caused by few artificial patch.Also, generate 2.5 dimension electronic maps relative to three-dimensional map service for, data volume compared with
Small, network transfer speeds require lower, can greatly reduce data volume.Solve heavy workload existing for art methods with
And the technical problem that three-dimensional map data amount is big.
Further, by digital orthoimage to after splicing electronic map carry out projection correction so that electronic map with
Digital orthoimage fitting, can be improved accuracy.
Further, in conjunction with the hot-zone data of acquisition and the attribute of element, according to the serial display scale of pre-production
Ruler map tile Parameter File and parameter preset carry out the electronic map after landscaping treatment to cut processing, map can be improved
The response speed of service is shown so that the electronic map obtained is capable of forming reference information abundant to clearly distinguish atural object
The entity in city.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is a kind of flow chart of the generation method of 2.5 dimension electronic maps in embodiment based on inclination threedimensional model；
Fig. 2 is the generation method flow chart of 2.5 dimension electronic maps in another embodiment based on inclination threedimensional model；
Fig. 3 is a kind of rendering flow chart of threedimensional model scene in embodiment；
Fig. 4 is the model scene schematic diagram constructed based on tilting threedimensional model；
Fig. 5 is the overall effect schematic diagram of threedimensional model scene rendering；
Fig. 6 is map rectification effect picture；
Fig. 7 is that map exception atural object modifies front and back comparison diagram；
Fig. 8 is 2.5 dimension electronic map tile file organization mode structure charts；
Fig. 9 is the 2.5 dimension electronic map product schematic diagrames obtained using method shown in Fig. 2；
Figure 10 is the structural frames of the generating means of 2.5 dimension electronic maps in the embodiment of the present invention based on inclination threedimensional model
Figure；
Figure 11 is the structure chart of computer readable storage medium in the embodiment of the present invention.
Specific embodiment
The present invention provides generation methods and device that electronic maps are tieed up in a kind of 2.5 based on inclination threedimensional model, first
Threedimensional model scene is constructed based on large scale inclination threedimensional model, digital orthoimage, digital elevation model, and is combined
Geomorphological features entity attribute information is acquired on the spot, and rendering processing is carried out to existing threedimensional model scene and generates 2.5 dimension electronics
Map；Then map rectification is carried out to generated 2.5 dimension map and the later period beautifies, while is raw based on entity information acquisition data
At hot-zone data, link correlation attribute information.For the response speed for improving Map Services, shown according to the good series of pre-production
Scale map tile Parameter File carries out electronic map to cut processing.So as to form reference information abundant with clear
Atural object is distinguished clearly, shows the entity in city, 2.5 dimension electronic maps of generation are for three-dimensional map service, data volume
Smaller, network transfer speeds require lower, can greatly reduce data volume.Solves heavy workload existing for art methods
And the technical problem that three-dimensional map data amount is big.
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Embodiment one
The generation method for present embodiments providing a kind of 2.5 dimension electronic maps based on inclination threedimensional model, refers to figure
1, this method comprises:
Step S1 is first carried out: establishing inclination threedimensional model, digital orthoimage sum number according to oblique aerial photography data
Word elevation model.
Specifically, oblique aerial photography data are obtained by oblique photograph technology, logical by oblique photograph technology
It crosses from 1 vertical, 4 inclination, 5 different visual angles acquire image, can more truly react geomorphological features, substantially reduce
Aeroplane photography three-dimensional modeling cost has advantage outstanding in terms of the three-dimensional modeling of digital city.The technical characteristic of oblique photograph
Advantage is mainly shown as: (1) relative to orthography, tilting image energy and allow user's atural object from multiple angles, make up and just penetrate
The shortcoming of the single angle shot image of image；(2) height, length, area, angle, the gradient can be carried out to achievement image
Deng measurement, it is advantageous to the extension of industrial application；(3) based on air photo technique is just penetrated, in addition from inclination image batch extracting
And the technology of patch texture, it can be effectively reduced cybercity construction cost；(4) the image data amount that oblique photograph technology obtains
Much smaller, data format can fast implement Web Publishing and sharing application.In terms of oblique photograph measuring system is digital mapping
One important breakthrough.
Present invention applicant is had found by largely practicing: traditional Two-dimensional electron map has been unable to meet informationization increasingly
The demand of development, and full three-dimensional map data amount is big, it is high to network transfer speeds requirement, it is not easy to make three-dimensional map
With.A kind of generation method of 2.5 dimension electronic maps based on inclination threedimensional model is thus proposed, 2.5 dimension maps are will be three-dimensional
The image exported after model fixed angle, is in the nature two-dimension picture but the display effect with threedimensional model, therefore referred to as 2.5
Tie up electronic map.2.5 dimension Map Services are smaller relative to three-dimensional map service data amount, network transfer speeds requirement is lower, and
With gorgeous rendering effect, practicability is very high, in reality using wide.And inclined by oblique photograph technology
Then loxodrome sky photographed data establishes inclination threedimensional model, digital orthoimage and digital elevation model, can greatly reduce reality
Error caused by ground shooting atural object texture, storage, the heavy workload of patch processing and artificial patch.
Wherein, digital orthoimage (Digital Orthophoto Map DOM) is using digital elevation model to scanning
Digitized airphoto/remote sensing image (monochromatic/colored) of processing, carries out height displacement's correction through picture dot one by one, then press image
It inlays, the image data of generation is cut out according to figure amplitude range, DOM has precision height, abundant information, intuitive true to nature, acquisition fast
The advantages that.Digital elevation model (Digital Elevation Model), vehicle economy M is by limited terrain elevation data
Realize that it is with one group of orderly array of values to the digitized simulation (i.e. the digital expression of topographical surface form) of ground surface or terrain
A kind of actual ground model of form expression ground elevation.
In the present embodiment, the ground resolution for tilting threedimensional model is greater than or equal to 5CM, digital orthophoto map
(DOM) scale bar is 1:1000, and the scale bar of digital complex demodulation is 1:1000.
Then it executes step S2: being based on the inclination threedimensional model, digital orthoimage and digital elevation model, building three
Dimension module scene.
In the specific implementation process, the building that three-dimensional software combination DOM and DEM carry out three-dimensional scenic, example be can use
Three-dimensional scenic building can be such as carried out in 2012 software of Autodesk 3ds MAX, model periphery no data part recycles
DOM and DEM building three-dimensional terrain model is supplemented, and Fig. 4 is referred to, and is three-dimensional scenic schematic diagram.
Then step S3 is executed: acquisition entity information, wherein make using the block that the digital orthoimage is divided as base map
For the working base map of entity information acquisition.
In one embodiment, the entity information acquired in step S3 includes terrestrial object information and terrain object attribute information,
Middle terrestrial object information includes: building, road, river, bus station, communal facility, one or more, the terrain object attribute packet in park
Include one of title, position, direction, structure, trend, width or a variety of.
Specifically, after acquiring entity information, by recording material data management table, material record simultaneously draws acquisition
Plan view, by the entity information typing map office of acquisition.Road includes overhead in terrestrial object information, and communal facility includes bridge, stops
Parking lot, gate, greening, enclosure wall, memorial archway, large board etc., park include pavilion, flower bed, stone table, stool, pool etc., acquisition
The information such as title, position, direction, structure, trend, the width of atural object.
In one embodiment, after step S3 acquires entity information, further includes:
It takes pictures to entity, and photo is stored.
Next it executes step S4: block division is carried out to the threedimensional model scene, according to the setting pair of the block of division
Then the scene angle answered carries out the image rendering that rendering generates each block according to the block of division and the scene angle of setting
Achievement, then the image rendering achievement of each block is spliced, obtain spliced electronic map.
Specifically, scene angle includes pitch angle and yaw angle.
In the specific implementation process, specific render process is as shown in figure 3, first carry out the threedimensional model scene
Block divides, and then carries out the setting of yaw angle, pitch angle, then carries out model rendering, mosaic splicing and the effect of drawing beautification,
Then quality inspection is carried out to it, treated whether map is qualified for judgement, exports spliced electronic map if qualification, unqualified
Model rendering is then carried out again.Wherein, corresponding pitch angle and yaw angle can be arranged with experience according to the actual situation, as excellent
Choosing, by pitch angle be set as 45 °, angle of drift be set as 45 ° of due north and north by east.For some area, using in the present embodiment
Rendering method, obtained whole rendering effect is as shown in Figure 5.
Step S5 is executed again: color adjustment, abnormal texture amendment being carried out to the spliced electronic map, and combines and adopts
The entity information of collection handles the entity for including in electronic map, the electronic map after obtaining landscaping treatment, wherein electronics
The entity for including in map includes road network, water system, greening, massif, vegetation.
Specifically, to map color makees corresponding adjusting on the basis of the initial achievements of step S4 rendering, on map
On the basis of combine the entity information of acquisition to road network (road name, road axis, lane, crossing etc.), water system, green
Change, massif, vegetation etc. are handled, and the abnormal atural object in map is modified, and effect can be made more to coordinate, uniformly
Effect.Specifically include the following aspects:
(1) road name, bridge name: combining the entity information of acquisition to carry out road name, road axis on the basis of on map,
Lane, the production of crossing；
(2) water system, lake: on the basis of map, the modification of water system, lake is carried out with tools such as Photoshop, is made whole
Figure effect reaches further beautification；
(3) abnormal atural object modification: the texture generated in manufacturing process to abnormal object is modified, and makes owned building
With real-texture, image performance, validity reach 90% or more on building texture and colour system.In a kind of specific example,
Using the method in present embodiment abnormal atural object modification is carried out with unmodified comparison diagram for somewhere as shown in fig. 7, its
The middle left side is before modifying, and the right is after modifying.
As another embodiment, in order to improve the effect of electronic map, the present embodiment additionally provides another kind 2.5 and ties up
The generation method of electronic map, refers to Fig. 2 comprising further includes step S6~S8 except the aforementioned step S1~S5.
After step s 5, the method also includes step S6:
Projection correction is carried out to electronic map after splicing based on digital orthoimage, so that electronic map and digital orthogonal projection
As fitting.
Specifically, it can use ArcGIS desktop utility combination digital orthoimage (DOM) and carry out projection correction,
So that 2.5 dimension map achievements and DOM image fitting, and adjust direct north.In order to further increase calibration result, timing institute
Multiple position dispersion selections are wanted in the selection at the control point of choosing, and selection wedge angle or intersection, feature are significantly put and do control point.Please
Referring to Fig. 6, for the map rectification effect picture obtained using the step of step S6 of the present invention.
After step S6, the method also includes step S7 and step S8:
Step S7: the entity letter of 2.5 dimension electronic maps and step S3 acquisition after the landscaping treatment obtained based on step S5
Breath sketches out the profile of each atural object element, and increases corresponding attribute to each atural object element, generates hot-zone data；
Step S8: in conjunction with the attribute of the step S7 hot-zone data obtained and element, according to the series display ratio of pre-production
Example ruler map tile Parameter File and parameter preset, carry out the electronic map after landscaping treatment to cut processing.
Specifically, step S7 is referred to the entity information that step S5 obtains 2.5 dimension electronic maps and combination acquisition, benefit
Produced hot-zone data with ArcGIS10.2Desktop, and delineated building, emphasis community, villages within the city, road, bridge, park etc.
The profile of atural object element, and corresponding attribute is increased to each element.
Step S8 mainly carries out electronic map slice, utilizes the ArcGIS software series display ratio good according to pre-production
Example ruler map tile Parameter File, carries out electronic map to cut processing.Specific tile file organization mode using data set,
Layer, the description of column catalogue structure, refer to Fig. 8, are the organizational form structure chart of map tile file.In addition, map drawing is pre-
Setting parameter does following setting:
Mapping scale be 18,19,20 grades of three ranks, respectively correspond scale bar be 1:2,254.46；1:1,127.23,
1:563.62；
Map plane coordinate system is using 2000 national earth coordinates；
Map height datum uses 1985 state height benchmark；
Projection pattern takes 117 ° 00 ' 00 using 3 ° of points of band projections of Gauss-Ke Lvge, central meridian "；
Pitch angle is set as 45 °, yaw angle is due north, 45 ° of north by east；
Resolution ratio is 0.1 meter.
The 2.5 dimension ground in the city are constructed for the city of certain southeastern coast by the generation method of the electronic map in Fig. 2
Figure, as shown in figure 9, vividly truly realizing online digital city by intuitive geographical outdoor scene analog representation mode, enriching
The city Liao Gai Fundamental Geographic Information Data.
Said one or multiple technical solutions in the embodiment of the present application at least have following one or more technology effects
Fruit:
The invention proposes the generation method that electronic maps are tieed up in a kind of 2.5 based on inclination threedimensional model, basis first is inclined
Loxodrome sky photographed data establishes inclination threedimensional model, digital orthoimage and digital elevation model, then constructs threedimensional model field
Scape acquires entity information, then carries out rendering to the threedimensional model scene and obtains spliced electronic map；Again to the spelling
Electronic map landscaping treatment after connecing generates 2.5 dimension electronic maps.It is three-dimensional based on aeroplane photography is just penetrated in compared with the existing technology
Model shoots the workload of atural object texture, storage can greatly reduce for generating 3 dimension electronic maps on the spot, and can subtract
Error caused by few artificial patch.Also, the 2.5 dimension electronics generated are for three-dimensional map service, and data volume is smaller, net
The requirement of network transmission speed is lower, can greatly reduce data volume.Solve method in the prior art there are heavy workload and
The big technical problem of three-dimensional map data amount.
Further, by digital orthoimage to after splicing electronic map carry out projection correction so that electronic map with
Digital orthoimage fitting, can be improved accuracy.
Further, in conjunction with the hot-zone data of acquisition and the attribute of element, according to the serial display scale of pre-production
Ruler map tile Parameter File and parameter preset carry out the electronic map after landscaping treatment to cut processing, map can be improved
The response speed of service shows city so that obtaining electronic map is capable of forming reference information abundant to clearly distinguish atural object
The entity in city.
Embodiment two
The generating means for present embodiments providing a kind of 2.5 dimension electronic maps based on inclination threedimensional model, refer to figure
10, which includes:
Module 301 is established, for establishing inclination threedimensional model, digital orthoimage sum number according to oblique aerial photography data
Word elevation model；
Module 302 is constructed, for being based on the inclination threedimensional model, digital orthoimage and digital elevation model, building
Threedimensional model scene；
Acquisition module 303, for acquiring entity information, wherein the block divided using the digital orthoimage as base map
Working base map as entity information acquisition；
Rendering module 304 is arranged according to the block of division and corresponds to for carrying out block division to the threedimensional model scene
Scene angle, then according to the block of division and the scene angle of setting carry out rendering generate the image rendering of each block at
Fruit, then the image rendering achievement of each block is spliced, obtain spliced electronic map；
Beautify module 305, for carrying out color adjustment, abnormal texture amendment to the spliced electronic map, and ties
The entity information for closing acquisition handles the entity for including in electronic map, the electronic map after obtaining landscaping treatment, wherein
The entity for including in electronic map includes road network, water system, greening, massif, vegetation.
In one implementation, described device further includes generation module and cuts module,
Wherein, generation module is used for: the entity letter of 2.5 dimension electronic maps after the landscaping treatment based on acquisition and acquisition
Breath sketches out the profile of each atural object element, and increases corresponding attribute to each atural object element, generates hot-zone data；
It cuts module to be used for: in conjunction with the hot-zone data of acquisition and the attribute of element, according to the series display ratio of pre-production
Example ruler map tile Parameter File and parameter preset, carry out the electronic map after landscaping treatment to cut processing.
By the device that the embodiment of the present invention two is introduced, to implement in the embodiment of the present invention one based on inclination threedimensional model
2.5 dimension electronic maps generation method used by device, so based on the method that the embodiment of the present invention one is introduced, ability
The affiliated personnel in domain can understand specific structure and the deformation of the device, so details are not described herein.All embodiment of the present invention one
Method used by device belong to the range to be protected of the invention.
Embodiment three
Based on the same inventive concept, present invention also provides a kind of computer readable storage medium 400, referring to Figure 11,
It is stored thereon with computer program 411, which is performed the method realized in embodiment one.
By the computer readable storage medium that the embodiment of the present invention three is introduced, to implement base in the embodiment of the present invention one
The computer readable storage medium used by the generation method of 2.5 dimension electronic maps of inclination threedimensional model, so based on this
The method that inventive embodiments one are introduced, the affiliated personnel in this field can understand the specific structure of the computer readable storage medium
And deformation, so details are not described herein.Computer readable storage medium used by the method for all embodiment of the present invention one is all
Belong to the range of the invention to be protected.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications can be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, those skilled in the art can carry out various modification and variations without departing from this hair to the embodiment of the present invention
The spirit and scope of bright embodiment.In this way, if these modifications and variations of the embodiment of the present invention belong to the claims in the present invention
And its within the scope of equivalent technologies, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of generation method of the 2.5 dimension electronic maps based on inclination threedimensional model characterized by comprising
Step S1: inclination threedimensional model, digital orthoimage and digital elevation model are established according to oblique aerial photography data；
Step S2: being based on the inclination threedimensional model, digital orthoimage and digital elevation model, constructs threedimensional model scene；
Step S3: acquisition entity information, wherein the block divided using the digital orthoimage as base map is adopted as entity information
The working base map of collection；
Step S4: carrying out block division to the threedimensional model scene, corresponding scene angle is arranged according to the block of division, so
The image rendering achievement that rendering generates each block is carried out according to the block of division and the scene angle of setting afterwards, then by each area
The image rendering achievement of block is spliced, and spliced electronic map is obtained；
Step S5: color adjustment, abnormal texture amendment are carried out to the spliced electronic map, and combine the entity letter of acquisition
Breath handles the entity for including in electronic map, the electronic map after obtaining landscaping treatment, wherein include in electronic map
Entity include road network, water system, greening, massif, vegetation.
2. the method as described in claim 1, which is characterized in that after step s 5, the method also includes step S6:
Projection correction is carried out to electronic map after splicing based on digital orthoimage, so that electronic map and digital orthoimage set
It closes.
3. method according to claim 2, which is characterized in that after step S6, the method also includes step S7 and steps
Rapid S8:
Step S7: the entity information of 2.5 dimension electronic maps and step S3 acquisition after the landscaping treatment obtained based on step S5 is hooked
The profile of each atural object element is drawn, and corresponding attribute is increased to each atural object element, generates hot-zone data；
Step S8: in conjunction with the attribute of the step S7 hot-zone data obtained and element, according to the serial display scale ruler of pre-production
Map tile Parameter File and parameter preset carry out the electronic map after landscaping treatment to cut processing.
4. the method as described in claim 1, which is characterized in that the entity information acquired in step S3 includes terrestrial object information and ground
Object attribute information, wherein terrestrial object information include: building, road, river, bus station, communal facility, park it is one or more,
Terrain object attribute information includes one of title, position, direction, structure, trend, width or a variety of.
5. the method as described in claim 1, which is characterized in that after step S3 acquires entity information, further includes:
It takes pictures to entity, and photo is stored.
6. method as claimed in claim 3, which is characterized in that the organizational form of the map tile Parameter File in step S8 is adopted
It is retouched with data set, layer, column catalogue structure, parameter preset includes map drawing scale bar, map plane coordinate system, elevation base
Standard, projection pattern, resolution ratio.
7. the method as described in claim 1, which is characterized in that scene angle includes pitch angle and yaw angle.
8. a kind of generating means of the 2.5 dimension electronic maps based on inclination threedimensional model characterized by comprising
Module is established, for establishing inclination threedimensional model, digital orthoimage and digital elevation according to oblique aerial photography data
Model；
Module is constructed, for being based on the inclination threedimensional model, digital orthoimage and digital elevation model, constructs threedimensional model
Scene；
Acquisition module, for acquiring entity information, wherein the block divided using the digital orthoimage as base map is as entity
The working base map of information collection；
Corresponding scene is arranged according to the block of division for carrying out block division to the threedimensional model scene in rendering module
Then angle carries out the image rendering achievement that rendering generates each block according to the block of division and the scene angle of setting, then
The image rendering achievement of each block is spliced, spliced electronic map is obtained；
Beautify module, for carrying out color adjustment, abnormal texture amendment to the spliced electronic map, and combines acquisition
Entity information handles the entity for including in electronic map, the electronic map after obtaining landscaping treatment, wherein electronic map
In include entity include road network, water system, greening, massif, vegetation.
9. device as claimed in claim 8, which is characterized in that it further include generation module and cutting module,
Wherein, generation module is used for: the entity information of 2.5 dimension electronic maps and acquisition after the landscaping treatment based on acquisition hooks
The profile of each atural object element is drawn, and corresponding attribute is increased to each atural object element, generates hot-zone data；
It cuts module to be used for: in conjunction with the hot-zone data of acquisition and the attribute of element, according to the serial display scale ruler of pre-production
Map tile Parameter File and parameter preset carry out the electronic map after landscaping treatment to cut processing.
10. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the program is performed
Realize the method as described in any one of claims 1 to 7 claim.
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