CN110096562A - 3 D model construction method, device and equipment in memory, GIS platform - Google Patents
3 D model construction method, device and equipment in memory, GIS platform Download PDFInfo
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- CN110096562A CN110096562A CN201910327868.5A CN201910327868A CN110096562A CN 110096562 A CN110096562 A CN 110096562A CN 201910327868 A CN201910327868 A CN 201910327868A CN 110096562 A CN110096562 A CN 110096562A
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Abstract
The invention discloses 3 D model construction method, device and equipment in memory, GIS platform, wherein the method includes obtaining the two-dimentional geographic information data of each geographical information element in default city；The coordinate-system of each geographical information element is converted into each geographical information element coordinate system unified in GIS platform；Obtain the specific information data of presupposed information element in geography information element；According to the corresponding face profile information data of presupposed information element and specific information data, textures are carried out to presupposed information element, construct the threedimensional model of presupposed information element；According to coordinate system unified in corresponding GIS platform, the coordinate and sitting posture of the bottom surface of the threedimensional model of each presupposed information element are set in GIS platform.The embodiment of the present invention when constructing threedimensional model without acquire the geography information element of a large amount of presupposed information element and rebuild with each consistent threedimensional model of presupposed information element height of contour, so as to save a large amount of workload.
Description
Technical field
The present invention relates to a kind of GIS application fields, more particularly to threedimensional model in memory, GIS platform
Construction method, device and equipment.
Background technique
With the continuous development of technology, GIS-Geographic Information System (Geographic Information System, GIS) has been
Through being widely applied to different fields.Wherein, the Visualized Urban Outer Prestress management system based on two-dimension GIS and three-dimension GIS can incite somebody to action
A variety of critical datas of city operations core system carry out visualization presentation, thus to include emergency command, it is city management, public
The fields such as safety, environmental protection, intelligent transportation, urban planning are managed decision support, and then realize the management of city intelligent formula
And operation.
Two-dimension GIS Visualized Urban Outer Prestress management system shows city in a manner of planarizing figure constructing two dimensional model
Geography information, the shortcomings that this mode is to show that the geography information of the solid space of three-dimensional city will cause by X-Y scheme
The missing of spatial information cannot intuitively observe the real scene of city space.
Based on problem above, start the Visualized Urban Outer Prestress management system for having occurred based on three-dimension GIS in the prior art.Currently
Generally can be by the geographical information collections mode such as technology of taking photo by plane to obtain based on the Visualized Urban Outer Prestress management system of three-dimension GIS
After the geography information element needed, threedimensional model is constructed.Although inventor has found that can be more by building threedimensional model
Add the true real scene that city space is presented, but the construction work amount of threedimensional model is huge；In addition, with society it is fast
Speed development, the update of the geography information element such as building and road of modern city also very frequently, therefore, are based in the prior art
The Visualized Urban Outer Prestress management system of three-dimension GIS can expend huge workload, and its threedimensional model when constructing threedimensional model
Renewal speed efficiency it is lower.
The information disclosed in the background technology section is intended only to increase the understanding to general background of the invention, without answering
When being considered as recognizing or imply that the information constitutes the prior art already known to those of ordinary skill in the art in any form.
Summary of the invention
The object of the present invention is to provide 3 D model construction method, device and equipment in memory, GIS platform, from
And overcome the workload expended when constructing threedimensional model in the prior art huge, and the efficiency of the renewal speed of its threedimensional model
Lower disadvantage.
To achieve the above object, according to the first aspect of the invention, the present invention provides threedimensional models in GIS platform to construct
Method, comprising steps of
Obtain the two-dimentional geographic information data of each geographical information element in default city；The geographical information packet of two dimension
Include the location information data of the face profile of the geography information element；
It is unified in GIS platform that the coordinate-system of each geography information element is converted into each geography information element
Coordinate system；
Obtain the specific information data of presupposed information element in the geography information element；The presupposed information element includes
Building；The specific information data includes the altitude information and/or the number of plies of the presupposed information element；
According to the corresponding face profile information data of the presupposed information element and specific information data, to the default letter
It ceases element and carries out textures, construct the threedimensional model of the presupposed information element；
According to coordinate system unified in corresponding GIS platform, the three of each presupposed information element are set in GIS platform
The coordinate and sitting posture of the bottom surface of dimension module.
Further, in above-mentioned technical proposal, further includes:
According to sunlight irradiating angle, shadow setting is carried out to the threedimensional model.
Further, described that textures are carried out to the presupposed information element in above-mentioned technical proposal, construct the presupposed information
The threedimensional model of element, comprising:
The wide height of facade of the threedimensional model of the presupposed information element is calculated according to the altitude information, then it is regular
Normal map is pasted on the threedimensional model facade, the threedimensional model is made to have concave-convex sense.
Further, described that textures are carried out to the presupposed information element in above-mentioned technical proposal, construct the presupposed information
The threedimensional model of element, comprising:
It is split into triangular facet using triangular facet subdivision algorithm, by different two-dimensional vector datas, by triangular facet in three-dimensional
A unified plane is uniquely determined in solid space；It include: that concave polygon dismantling will can be encountered during triangular facet subdivision
For multiple convex polygons, then carry out triangular facet subdivision.
Further, in above-mentioned technical proposal, further includes:
The threedimensional model of the presupposed information element and the incidence relation of preset attribute data are established, to realize according to three-dimensional
The preset attribute of presupposed information element described in pattern query.
According to the second aspect of the invention, the present invention also provides threedimensional model construction device in a kind of GIS platform, packets
It includes:
2-D data acquiring unit, the two-dimentional geographic information data of each geographical information element for obtaining default city；
The geographical information packet of two dimension includes the location information data of the face profile of the geography information element；
Converting unit exists for the coordinate-system of each geography information element to be converted to each geography information element
Unified coordinate system in GIS platform；
Specific information acquiring unit, for obtaining the specific information number of presupposed information element in the geography information element
According to；The presupposed information element includes building；The specific information data includes the altitude information of the presupposed information element
And/or the number of plies；
Textures unit, for according to the corresponding face profile information data of the presupposed information element and specific information number
According to, to the presupposed information element carry out textures, construct the threedimensional model of the presupposed information element；
Threedimensional model setting unit, for being arranged in GIS platform according to coordinate system unified in corresponding GIS platform
The coordinate and sitting posture of the bottom surface of the threedimensional model of each presupposed information element.
Further, in above-mentioned technical proposal, further includes:
Viewing setting unit, for carrying out shadow setting to the threedimensional model according to sunlight irradiating angle.
Further, in above-mentioned technical proposal, further includes:
Associative cell, for establishing the threedimensional model of the presupposed information element and the incidence relation of preset attribute data,
To realize the preset attribute for inquiring the presupposed information element according to threedimensional model.
In order to solve the above technical problems, the embodiment of the invention also provides a kind of memory, the memory includes non-temporary
State computer readable storage medium, the non-transient computer readable storage medium is stored with computer executable instructions, described
Computer executable instructions realize identical technical effect for executing method described in the above various aspects.
In order to solve the above technical problems, the embodiment of the invention also provides threedimensional models in a kind of GIS platform to construct equipment,
Threedimensional model building equipment includes the computer program of storage on a memory, the computer program packet in the GIS platform
Program instruction is included, when described program instruction is computer-executed, the computer is made to execute side described in the above various aspects
Method, and realize identical technical effect.
Beneficial effect
3 D model construction method, device and equipment in memory provided in an embodiment of the present invention, GIS platform, Ke Yigen
Come according to the two-dimentional geographic information data of each geographical information element and the specific information data of additional presupposed information element in city
Automatically construct the threedimensional model of such as building presupposed information element in GIS platform；Specifically, the embodiment of the present invention is first
The two-dimentional geographic information data of each geographical information element in default city is obtained in the way of two bit models of building, at this point,
It is obtained with the two-dimentional geographic information data of the various geography information elements such as road, river and building；Thus may be used also
To determine the face profile information data of the default geography information element (such as building) in actual scene with actual height
2 d plane picture (obtains corresponding face profile information data according to 2 d plane picture)；Then, by the conversion of coordinate-system,
The coordinate-system of each geography information element can be implanted in GIS platform；In the embodiment of the present invention, it is also necessary to obtain pre-
If the specific information data of information element, such as the altitude information and number of plies information of building, as building building three-dimensional mould
The foundation of type.Next, according to the corresponding face profile information data of building and altitude information, to building carry out textures with
Construct the threedimensional model of building；Finally according to coordinate system unified in corresponding GIS platform, it is arranged in GIS platform and respectively builds
The coordinate and sitting posture of the bottom surface of the threedimensional model of object are built, to realize that threedimensional model constructs in GIS platform.
From the above, it can be seen that through the embodiment of the present invention, when constructing threedimensional model without acquiring a large amount of presupposed information
The geography information element of element and rebuild with each consistent threedimensional model of presupposed information element height of contour, so as to
Save a large amount of workload.
Further, since through the embodiment of the present invention, it is only necessary to obtain the corresponding two-dimentional geographic information data of building and spy
Determine information data, the three-dimensional model building can be automatically generated, so as to timely according to real during urban development
The continuous renewal of the building on border in real time quickly updates threedimensional model in GIS platform, to improve based on three-dimensional
The timeliness of the Visualized Urban Outer Prestress management system of GIS platform.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, other feature of the invention and aspect
It is clear.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the step schematic diagram of 3 D model construction method in GIS platform provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of threedimensional model construction device in GIS platform provided in an embodiment of the present invention；
Fig. 3 is that threedimensional model constructs device hardware structural schematic diagram in GIS platform provided in an embodiment of the present invention.
Specific embodiment
With reference to the accompanying drawing, specific embodiments of the present invention will be described in detail, it is to be understood that guarantor of the invention
Shield range is not limited by the specific implementation.
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 creative efforts, shall fall within the protection scope of the present invention.Unless
Separately have it is other explicitly indicate that, otherwise in entire disclosure and claims, term " includes " or its transformation such as "comprising" or
" including " etc. will be understood to comprise stated element or component, and not exclude other elements or other compositions
Part.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In some instances, for
Method well known to those skilled in the art, means, element are not described in detail, in order to highlight purport of the invention.
Embodiment 1
Fig. 1 shows the flow chart of 3 D model construction method in GIS platform provided in an embodiment of the present invention, and this method can be with
It is executed by electronic equipment, such as the network equipment, terminal device or server device etc..In other words, the method can be by installing
It is executed in the software or hardware of the network equipment, terminal device or server device.The server-side includes but is not limited to: separate unit
Server, server cluster etc..With reference to Fig. 1, this approach includes the following steps.
S11, the two-dimentional geographic information data for presetting each geographical information element in city is obtained；The geographical Information Number of two dimension
According to the location information data for the face profile for including the geography information element；
The application scenarios of the embodiment of the present invention can be the building for Visualized Urban Outer Prestress management system, Visualized Urban Outer Prestress pipe
It the interface of reason system can be with the geography information element such as the street of patterned Reappearance of city, building, park and river.
In the prior art, the Visualized Urban Outer Prestress management system based on three-dimension GIS is needed when it constructs 3 D graphical interface
Required geography information element is obtained on the spot by a variety of geographical information collection modes such as the technology of taking photo by plane, then further according to adopting
Collection data generate the threedimensional model of each geography information element, finally also need the three-dimensional mould according to each geography information element
Type constructs the whole Three Dimensional Interface of Visualized Urban Outer Prestress management system.Due to the three-dimensional mould of each geographical information element in the prior art
The building of type is dependent on the data acquired on the spot, therefore the construction work amount of threedimensional model is huge；Moreover, when geographical information element
Update when, synchronized update for Visualized Urban Outer Prestress management system is as need to acquire geographical information element on the spot again
And it causes to update and lag.
The final purpose of the embodiment of the present invention is also intended to realize geography information element in the management system of Visualized Urban Outer Prestress
Three-dimensional display, but unlike the prior art, the embodiment of the present invention is not necessarily to acquire the three-dimensional of each geographical information element on the spot
Data, that is, the embodiment of the present invention obtains the two-dimentional geographic information data of each geographical information element in default city first；Two-dimensionally
Reason information data includes the face profile information data of geography information element, that is to say, that the embodiment of the present invention obtained first
It is the geography information element for constructing two dimensional model, for example, can be includes the ground such as street, river, park and building
Manage the plan view of information element.
S12, the coordinate-system of each geographical information element is converted to each geographical information element seat unified in GIS platform
Mark system；
It,, can be can by the conversion of coordinate system by each geographical Information element Data of acquisition in the embodiment of the present invention
The building of each geographical information element two dimensional model is realized in city management system depending on changing.The building of two dimensional model is compared to three-dimensional mould
Type, the acquisition of geography information element data are more easy, in addition, constructing the workload of two dimensional model by 2-D data
It is much smaller.
S13, the specific information data for obtaining presupposed information element in geography information element；Presupposed information element includes building
Object；Specific information data includes the altitude information and/or the number of plies of presupposed information element；
Specific information data in the embodiment of the present invention, which refers to, to be likely to occur variation and needs to show by threedimensional model
Geography information element typically can be building, during urban development, constantly have new building complete
At, also can constantly have building reconstruction update；In the embodiment of the present invention, when thering is presupposed information element to need to update,
Without acquiring the three-dimensional data of the geography information element on the spot, it is only necessary to obtain altitude information, the number of plies of the geography information element
With the location information of the geography information element bottom surface.
S14, according to the corresponding face profile information data of presupposed information element and specific information data, to presupposed information member
Element carries out textures, constructs the threedimensional model of presupposed information element；
In the embodiment of the present invention when constructing the threedimensional model of presupposed information element, it is no longer dependent on the geography information element
Practical three-dimensional data shown by textures but according to necessary datas such as the altitude information of presupposed information element and/or the numbers of plies
The corresponding threedimensional model of building of meaning property.
In practical applications, the specific of corresponding threedimensional model is schematically constructed by textures in the embodiment of the present invention
Step may include: the wide height of facade that the threedimensional model of the presupposed information element is calculated according to altitude information, then regular
Normal map is pasted on threedimensional model facade, threedimensional model is made to have concave-convex sense.
Wherein, to presupposed information element carry out textures concrete mode can be, using triangular facet subdivision algorithm, will be different
Two-dimensional vector data be split into triangular facet, a unified plane is uniquely determined in three-dimensional space by triangular facet；
In order to further reduce operation cost, preferably can also include: will can be encountered during triangular facet subdivision it is recessed more
Shape dismantling in side is multiple convex polygons, then carries out triangular facet subdivision.
It preferably, in embodiments of the present invention, can also include step during textures, according to sunlight irradiating angle,
Shadow setting is carried out to threedimensional model, to further enhance the sense of reality of the threedimensional model in the management system of Visualized Urban Outer Prestress.
S15, according to coordinate system unified in corresponding GIS platform, the three of each presupposed information element are set in GIS platform
The coordinate and sitting posture of the bottom surface of dimension module.
It, can be with according to the position coordinate data of presupposed information element after the threedimensional model for constructing presupposed information element
According to coordinate system unified in its corresponding GIS platform, the bottom of the threedimensional model of each presupposed information element is set in GIS platform
The coordinate and sitting posture in face.To be shown corresponding geography information element with three dimensional pattern on the boundary of Visualized Urban Outer Prestress management system
In face.Wherein, by the way that the coordinate and sitting posture of the bottom surface of threedimensional model is arranged, presupposed information element can be determined in Visualized Urban Outer Prestress
In the interface of management system be specially and direction.
In conclusion the embodiment of the present invention can according to the two-dimentional geographic information data of each geographical information element in city and
The specific information data of additional presupposed information element automatically constructs in GIS platform such as building presupposed information element
Threedimensional model；Specifically, the embodiment of the present invention obtains the various regions in default city first, in accordance with the mode of building two dimensional model
The two-dimentional geographic information data of information element is managed, at this point, being obtained with the various geographical letters such as road, river and building
Cease the two-dimentional geographic information data of element；Thus the default geography information in actual scene with actual height can also be determined
The face profile information data 2 d plane picture of element (such as building) (obtains corresponding face profile according to 2 d plane picture to believe
Cease data)；Then, by the conversion of coordinate-system, the coordinate-system of each geography information element can be implanted to GIS and put down
In platform；In the embodiment of the present invention, it is also necessary to the specific information data for obtaining presupposed information element, as building altitude information and
The information such as the number of plies, the foundation as building three-dimensional model building.Next, according to the corresponding face profile Information Number of building
According to and altitude information, textures are carried out to construct the threedimensional model of building to building；Finally unite according in corresponding GIS platform
One coordinate system, is arranged the coordinate and sitting posture of the bottom surface of the threedimensional model of each building in GIS platform, to realize that GIS is flat
Threedimensional model constructs in platform.
From the above, it can be seen that through the embodiment of the present invention, it is a large amount of default without acquisition on the spot when constructing threedimensional model
The geography information element of information element and rebuild with each consistent threedimensional model of presupposed information element height of contour, thus
A large amount of workload can be saved.
Further, since through the embodiment of the present invention, it is only necessary to obtain the corresponding two-dimentional geographic information data of building and spy
Determine information data, the three-dimensional model building can be automatically generated, so as to timely according to real during urban development
The continuous renewal of the building on border in real time quickly updates threedimensional model in GIS platform, to improve based on three-dimensional
The timeliness of the Visualized Urban Outer Prestress management system of GIS platform.
It further, in embodiments of the present invention, can also include: to establish the threedimensional model of presupposed information element and preset
The incidence relation of attribute data, to realize the preset attribute for inquiring the presupposed information element according to threedimensional model.Pass through in this way
The threedimensional model of presupposed information element and the incidence relation of preset attribute data are established, it can be in Visualized Urban Outer Prestress management system
In interface, corresponding operation (as clicked) is carried out by the presupposed information element to three-dimensional display, can easily inquire and be somebody's turn to do
The corresponding attribute data of geography information element, in practical applications, preset attribute data can be building for geography information element
Between immediately and the information such as owner.
Embodiment 2
It is described Fig. 2 shows the structural schematic diagram of threedimensional model construction device in GIS platform provided in an embodiment of the present invention
Threedimensional model construction device is dress corresponding with 3 D model construction method in GIS platform described in embodiment 1 in GIS platform
It sets, that is, realize in embodiment 13 D model construction method in GIS platform by way of virtual bench, it is flat to constitute the GIS
Each virtual module of threedimensional model construction device can be executed by electronic equipment in platform, for example, the network equipment, terminal device or
Server.
Specifically, as shown in Fig. 2, threedimensional model construction device includes: in GIS platform in the embodiment of the present invention
2-D data acquiring unit 01, the geographical Information Number of two dimension of each geographical information element for obtaining default city
According to；The geographical information packet of two dimension includes the location information data of the face profile of the geography information element；
Converting unit 02, for the coordinate-system of each geography information element to be converted to each geography information element
The unified coordinate system in GIS platform；
Specific information acquiring unit 03, for obtaining the specific information number of presupposed information element in the geography information element
According to；The presupposed information element includes building；The specific information data includes the altitude information of the presupposed information element
And/or the number of plies；
Textures unit 04, for according to the corresponding face profile information data of the presupposed information element and specific information number
According to, to the presupposed information element carry out textures, construct the threedimensional model of the presupposed information element；
Threedimensional model setting unit 05, for being set in GIS platform according to coordinate system unified in corresponding GIS platform
Set the coordinate and sitting posture of the bottom surface of the threedimensional model of each presupposed information element.
Since the working principle and beneficial effect of threedimensional model construction device have existed in GIS platform in the embodiment of the present invention
It is also recorded and has been illustrated in 3 D model construction method in GIS platform in embodiment 1, therefore can be cross-referenced,
This is just repeated no more.
Embodiment 3
The embodiment of the invention provides a kind of memory, the memory can be non-transient (non-volatile) computer and deposit
Storage media, the computer storage medium are stored with computer executable instructions, which can be performed above-mentioned
In any means embodiment in GIS platform 3 D model construction method each step, and realize identical technical effect.
Embodiment 4
The embodiment of the invention provides threedimensional models in a kind of GIS platform to construct equipment, threedimensional model building in GIS platform
It include corresponding computer program product, program included by the computer program product in memory included by equipment
When instruction is computer-executed, the computer can be made to execute threedimensional model in GIS platform described in the above various aspects and constructed
Method, and realize identical technical effect.
Fig. 3 is that the embodiment of the present invention is shown as the hardware configuration of threedimensional model building equipment in the GIS platform of electronic equipment
It is intended to, as shown in figure 3, the equipment includes one or more processors 610 and memory 620.It is with a processor 610
Example.The equipment can also include: input unit 630 and output device 640.
Processor 610, memory 620, input unit 630 and output device 640 can pass through bus or other modes
It connects, in Fig. 3 for being connected by bus.
Memory 620 is used as a kind of non-transient computer readable storage medium, can be used for storing non-transient software program, non-
Transient computer executable program and module.The non-transient software journey that processor 610 is stored in memory 620 by operation
Sequence, instruction and module, thereby executing the various function application and data processing of electronic equipment, i.e. the realization above method is implemented
The processing method of example.
Memory 620 may include storing program area and storage data area, wherein storing program area can store operation system
Application program required for system, at least one function；It storage data area can storing data etc..In addition, memory 620 may include
High-speed random access memory, can also include non-transient memory, a for example, at least disk memory, flush memory device,
Or other non-transient solid-state memories.In some embodiments, it includes long-range relative to processor 610 that memory 620 is optional
The memory of setting, these remote memories can pass through network connection to processing unit.The example of above-mentioned network includes but not
It is limited to internet, intranet, local area network, mobile radio communication and combinations thereof.
Input unit 630 can receive the number or character information of input, and generate signal input.Output device 640 can
Equipment is shown including display screen etc..
One or more of modules are stored in the memory 620, when by one or more of processors
When 610 execution, execute:
Obtain the two-dimentional geographic information data of each geographical information element in default city；The geographical information packet of two dimension
Include the face profile information data of geography information element；
It is unified in GIS platform that the coordinate-system of each geography information element is converted into each geography information element
Coordinate system；
Obtain the specific information data of presupposed information element in the geography information element；The presupposed information element includes
Building；The specific information data includes the altitude information and/or the number of plies of the presupposed information element；
According to the corresponding face profile information data of the presupposed information element and specific information data, to the default letter
It ceases element and carries out textures, construct the threedimensional model of the presupposed information element；
According to coordinate system unified in corresponding GIS platform, the three of each presupposed information element are set in GIS platform
The coordinate and sitting posture of the bottom surface of dimension module.
Method provided by the embodiment of the present invention can be performed in the said goods, has the corresponding functional module of execution method and has
Beneficial effect.The not technical detail of detailed description in the present embodiment, reference can be made to method provided by the embodiment of the present invention.
The electronic equipment of the embodiment of the present invention exists in a variety of forms, including but not limited to following equipment.
(1) mobile communication equipment: the characteristics of this kind of equipment is that have mobile communication function, and to provide speech, data
Communication is main target.This Terminal Type includes: smart phone (such as iPhone), multimedia handset, functional mobile phone and low
Hold mobile phone etc..
(2) super mobile personal computer equipment: this kind of equipment belongs to the scope of personal computer, there is calculating and processing function
Can, generally also have mobile Internet access characteristic.This Terminal Type includes: PDA, MID and UMPC equipment etc., such as iPad.
(3) portable entertainment device: this kind of equipment can show and play multimedia content.Such equipment include: audio,
Video player (such as iPod), handheld device, e-book and intelligent toy and portable car-mounted navigation equipment.
(4) server: providing the equipment of the service of calculating, and the composition of server includes that processor, hard disk, memory, system are total
Line etc., server is similar with general computer architecture, but due to needing to provide highly reliable service, in processing energy
Power, stability, reliability, safety, scalability, manageability etc. are more demanding.
(5) other electronic devices with data interaction function.
The apparatus embodiments described above are merely exemplary, wherein described, unit can as illustrated by the separation member
It is physically separated with being or may not be, component shown as a unit may or may not be physics list
Member, it can it is in one place, or may be distributed over multiple network units.It can be selected according to the actual needs
In some or all of the modules achieve the purpose of the solution of this embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It is realized by the mode of software plus general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, above-mentioned technology
Scheme substantially in other words can be embodied in the form of software products the part that the relevant technologies contribute, the computer
Software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions to
So that computer equipment (can be personal computer, server or the network equipment etc.) execute each embodiment or
Method described in certain parts of embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. 3 D model construction method in a kind of GIS platform, which is characterized in that comprising steps of
Obtain the two-dimentional geographic information data of each geographical information element in default city；The geographical information packet of two dimension includes institute
State the location information data of the face profile of geography information element；
The coordinate-system of each geography information element is converted into each geography information element seat unified in GIS platform
Mark system；
Obtain the specific information data of presupposed information element in the geography information element；The presupposed information element includes building
Object；The specific information data includes the altitude information and/or the number of plies of the presupposed information element；
According to the corresponding face profile information data of the presupposed information element and specific information data, to the presupposed information member
Element carries out textures, constructs the threedimensional model of the presupposed information element；
According to coordinate system unified in corresponding GIS platform, the three-dimensional mould of each presupposed information element is set in GIS platform
The bottom surface coordinate and sitting posture of type.
2. 3 D model construction method in GIS platform according to claim 1, which is characterized in that further include:
According to sunlight irradiating angle, shadow setting is carried out to the threedimensional model.
3. 3 D model construction method in GIS platform according to claim 1, which is characterized in that described to described default
Information element carries out textures, constructs the threedimensional model of the presupposed information element, comprising:
The wide height of facade of the threedimensional model of the presupposed information element is calculated according to the altitude information, it is then regular described
Normal map is pasted on threedimensional model facade, the threedimensional model is made to have concave-convex sense.
4. 3 D model construction method in GIS platform according to claim 1, which is characterized in that described to described default
Information element carries out textures, constructs the threedimensional model of the presupposed information element, comprising:
Different two-dimensional vector datas is split into triangular facet using triangular facet subdivision algorithm, by triangular facet in 3 D stereo sky
Between in uniquely determine a unified plane；It include: by that can encounter concave polygon during triangular facet subdivision and disassemble is multiple
Convex polygon, then carry out triangular facet subdivision.
5. 3 D model construction method in GIS platform according to claim 1, which is characterized in that further include:
The threedimensional model of the presupposed information element and the incidence relation of preset attribute data are established, to realize according to threedimensional model
Inquire the preset attribute of the presupposed information element.
6. threedimensional model construction device in a kind of GIS platform characterized by comprising
2-D data acquiring unit, the two-dimentional geographic information data of each geographical information element for obtaining default city；It is described
Two-dimentional geography information packet includes the location information data of the face profile of the geography information element；
Converting unit, for the coordinate-system of each geography information element to be converted to each geography information element in GIS
Unified coordinate system in platform；
Specific information acquiring unit, for obtaining the specific information data of presupposed information element in the geography information element；Institute
Stating presupposed information element includes building；The specific information data include the presupposed information element altitude information and/or
The number of plies；
Textures unit is used for according to the corresponding face profile information data of the presupposed information element and specific information data, right
The presupposed information element carries out textures, constructs the threedimensional model of the presupposed information element；
Threedimensional model setting unit, for each institute according to coordinate system unified in corresponding GIS platform, to be arranged in GIS platform
State the coordinate and sitting posture of the bottom surface of the threedimensional model of presupposed information element.
7. threedimensional model construction device in GIS platform according to claim 1, which is characterized in that further include:
Viewing setting unit, for carrying out shadow setting to the threedimensional model according to sunlight irradiating angle.
8. threedimensional model construction device in GIS platform according to claim 1, which is characterized in that further include:
Associative cell, for establishing the threedimensional model of the presupposed information element and the incidence relation of preset attribute data, with reality
The preset attribute of the presupposed information element is now inquired according to threedimensional model.
9. a kind of memory, which is characterized in that including instruction set, described instruction collection is suitable for processor and executes such as claim 1 to 5
In step in any GIS platform in 3 D model construction method.
10. threedimensional model constructs equipment in a kind of GIS platform, which is characterized in that including bus, processor, input unit, output
Device and as claimed in claim 9 memory；
The bus is for connecting the memory and the processor；
The processor is used to execute the instruction set in the memory.
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