CN103679813B - The construction method of three-dimensional digital earth and three-dimensional digital earth system - Google Patents
The construction method of three-dimensional digital earth and three-dimensional digital earth system Download PDFInfo
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Abstract
The invention discloses the construction method of a kind of three-dimensional digital earth, including step: S101, acquisition process geodata also preserve, serviced by http or geodata after web services release processing；S102, the http service integrating described geodata or web services, to described geodata three-dimensional visualization and virtualization, and form three-dimensional digital earth application program；Three-dimensional rendering ability is virtualized, it is achieved three-dimensional digital earth GPU in virtualized environment accelerates to render in real time；S103, by use described three-dimensional digital earth application program obtain three-dimensional digital earth image information, to show three-dimensional digital earth.Present invention also offers the three-dimensional digital earth system corresponding with as above method.The mass data transmission problem that digital earth is applied by the present invention is reduced to picture transfer problem, eliminates the restriction to client devices computed ability and storage capacity.
Description
Technical field
The present invention relates to three-dimensional geographic information technical field, particularly relate to a kind of desktop virtualization applications supported
The construction method of three-dimensional digital earth and corresponding three-dimensional digital earth system.
Background technology
Three-dimensional digital earth is on the basis of tradition geographic information system technology, virtual with true three-dimension scene
Reality, have actual visual directly perceived and efficiently etc. feature in digital city, digital ocean, the field such as navigation
It is used widely.The visualization function of three-dimensional digital earth is one of critical function of digital earth, and it depends on
Bad a large amount of data the most accurately provide the information that more horn of plenty is true to nature, make various user combine oneself relevant experience
Accurately and quickly spatial decision just can be made with understanding.The interactive mode of three-dimensional digital earth mass data is true
Client computer hardware environment is had higher by true feeling visualization capability and complex space data analysis capabilities
Requirement, so need run three-dimensional geographic information application program client computer install figure video card and other
Preferably hardware configuration could obtain preferable Consumer's Experience, and some portable equipments such as net book, mobile phone,
Then run the most smooth or cannot be properly functioning on the equipment such as panel computer.
Chinese patent application file CN102945570A discloses the structure side of a kind of total space digial earth
Method, the method initially with mesh generation and interpolation mode fast and automatically by terrestrial space physical model
Build in three dimensions, in order to promote software performance and reduce data render pressure, use based on LOD
The terrestrial space model multi-scale expression mechanism of (Levels of Detail, level of detail model), by number
Word earth three-dimensional visualization is on computer screen.But this kind of method and similar additive method master
Lay particular emphasis on how research improves the rendering efficiency of client d engine, be substantially that client renders, right
The requirement of the rendering capability of client computer, computational analysis ability and network communications capability is the highest, such side
Method cannot be applied to thin client mode.
Meanwhile, along with the fast development of cloud computing technology, the Intel Virtualization Technology in cloud computing technology becomes
The study hotspot of industry, and occur in that the desktop virtual technology supporting thin client.By the table of computer
Face virtualizes, and to reach safety and the motility that desktop uses, can pass through any equipment, in office
Where point, accesses the desktop system belonging to we individual on network any time.But current main flow
Desktop virtual technology is difficult to meet the demand of client in terms of 3D graphics application program, and this also makes three dimensions
The word earth uses on the mobile apparatus becomes a bottleneck problem.
Summary of the invention
In order to solve the problem that prior art exists, the invention provides a kind of desktop virtualization applications supported
The construction method of three-dimensional digital earth and corresponding three-dimensional digital earth system, eliminate client device
Computing capability and the restriction of storage capacity, it is achieved that three-dimensional digital earth application program and client device configuration
Unrelated application.
For achieving the above object, present invention employs following technical scheme:
A kind of construction method of three-dimensional digital earth, including step:
S101, acquisition process geodata also preserve, and are serviced by http or after web services release processing
Geodata；
S102, the http service integrating described geodata or web services, can to described geodata three-dimensional
Depending on changing and virtualization, and form three-dimensional digital earth application program；Three-dimensional rendering ability is virtualized, it is achieved
Three-dimensional digital earth GPU in virtualized environment accelerates to render in real time；
S103, by use described three-dimensional digital earth application program obtain three-dimensional digital earth image information,
To show three-dimensional digital earth.
Wherein, step S101 specifically includes:
Gather geodata, process landform, image, model and vector data, make described data uniform format
And adapt to three-dimensional scenic and render；Make landform geometry and data texturing according to coding by uniform spaces coded method
One_to_one corresponding, carries out detail division to landform and image data, enables to adapt to large scale scene
Data Automatic dispatching；
According to data volume size and access loading demand size dynamic adaptation nodes；By terrain data, image
Data, model data are issued as http service, and vector data is issued as web services.
Wherein, step S102 specifically includes:
Use OpenGL to write fundamental digital earth engine bottom, the http of geodata is serviced or web
Service assembly, forms three-dimensional digital earth application program through software development；
Three-dimensional scenic is rendered the image information forming three-dimensional digital earth；
Described image information is passed back to the application program end of a virtual machine.
Wherein, in step S102, first described image information compression is processed and pass back to answering of a virtual machine again
With program end, in described virtual machine, then decompress described image information.
Wherein, by remote control protocol, described virtual machine and a client device are connected, by described client
Equipment, by using described three-dimensional digital earth application program, shows three-dimensional digital earth in client device.
Another aspect of the present invention is to provide a kind of three-dimensional digital earth system, including:
Data, services cluster, is used for processing geodata and preserving, and the geodata after release processing
Http service or web services；
Infrastructure services cluster, including host and the virtual machine that generated by host, described host
It is configured with figure video card；Described infrastructure services cluster also includes virtualize rendering module and teledata
Transport module, described virtualization rendering module includes that market demand submodule and 3D figure accelerate render farm,
Described market demand submodule integrates http service or the web of the geodata that described data, services cluster is issued
Service, forms three-dimensional digital earth application program and is arranged on described virtual machine；Described 3D figure accelerates wash with watercolours
Dye cluster is for virtualizing the three-dimensional rendering ability of described host, it is achieved three-dimensional digital earth is in virtualization
GPU in environment accelerates to render in real time；Described remote data transmission module is used for realizing described virtual machine and institute
State between host the real-time Transmission of information and mutual.
Wherein, described 3D figure accelerate render farm be VMGL, described VMGL include VMGL client and
VMGL server end, graphics process order is sent to described place in described virtual machine by described VMGL client
Main frame, described VMGL server end realizes acceleration in described host and renders, obtained after having rendered
Image information passes back to described virtual machine.
Wherein, described remote data transmission module also includes compression of images and decompression module, for by described
The image information that host has obtained after having rendered first is compressed processing and passes back to described virtual machine again, then
Described image information is decompressed in described virtual machine.
Wherein, described data, services cluster includes that data process submodule, data publication submodule and data base
Submodule, described data process submodule and are used for processing geodata, make described geodata uniform format also
Adapt to three-dimensional scenic render；Geodata after described data publication submodule release processing http service or
Web services；Described database subsystem module is for storing the first number required for described three-dimensional digital earth application program
According to and attribute data.
Wherein, described virtual machine is connected by remote control protocol and a client device, described client device
For by using described three-dimensional digital earth application program, to show three-dimensional digital earth.
Compared with prior art, the three-dimensional digital earth structure of support desktop virtualization applications proposed by the invention
Construction method, is put into the server end of virtual machine by rendering of three-dimensional geodata, and virtual-machine client receives wash with watercolours
Dye result also can control by real-time, interactive, it is achieved the mass data transmission problem that digital earth is applied is reduced to figure
Sheet transmission problem, eliminates the restriction to client devices computed ability and storage capacity, overcomes existing skill
The problem that three-dimensional digital earth application program in art is high to client device configuration performance requirement.
Accompanying drawing explanation
Fig. 1 is the three-dimensional digital earth system frame structure schematic diagram that one embodiment of the invention provides.
Fig. 2 be the three-dimensional digital earth data render in virtualized environment that provides of one embodiment of the invention and
Interaction diagrams.
Fig. 3 is the flow chart of steps of the construction method of three-dimensional digital earth in the embodiment of the present invention.
Detailed description of the invention
As it was previously stated, the invention aims to solve three-dimensional digital earth application program of the prior art
The problem high to client device configuration performance requirement, it is proposed that a kind of three-dimensional supporting desktop virtualization applications
Digital earth system, is put into the server end of virtual machine by rendering of three-dimensional geodata, virtual-machine client
Receive rendering result and can control by real-time, interactive, it is achieved the mass data transmission problem letter that digital earth is applied
Turning to picture transfer problem, user is by the application program in client device access virtual desktop, it is thus achieved that three
The image information of the dimension word earth, eliminates the restriction to client devices computed ability and storage capacity.
Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described.
As it is shown in figure 1, the embodiment of the present invention provide three-dimensional digital earth system include data, services cluster 1,
And infrastructure services cluster 2.Described infrastructure services cluster 2 is by remote control protocol and a client
End equipment 3 connects.Described data, services cluster 1 for acquisition process geodata and preserves, and passes through http
Geodata after service or web services release processing；Described infrastructure services cluster 2 is used for integrating institute
State http service or the web services of geodata, to described geodata three-dimensional visualization and virtualization, and
Form three-dimensional digital earth application program；Described client device 3 is for by using described 3-dimensional digital ground
Ball application program, to show three-dimensional digital earth.
Wherein, described data, services cluster 1 includes multiple data server 101 (data server 1～n) sum
According to storehouse server 102.Described data, services cluster 1 is divided into data to process submodule 103, data publication submodule
Block 104 and data base's submodule 105.Described data process submodule 102 and are used for processing geodata, make institute
State geodata uniform format and adapt to three-dimensional scenic and render；Described data publication submodule 104 is used for issuing
The http service of the geodata after process or web services；Described database subsystem module 105 is for storage three
Metadata required for dimension word application program and attribute data.
Wherein, described infrastructure services cluster 2 includes host 201 and is generated by host 201
Virtual machine 202.Described host 201 be configured with high performance professional graphic video card 203(such as NVIDIA or
The high performance video cards of ATI).Described infrastructure services cluster 2 also includes virtualize rendering module 204 He
Remote data transmission module 205.Described virtualization rendering module 204 includes market demand submodule 2041 He
3D figure accelerates render farm 2042.Described market demand submodule 2041 integrates described data, services cluster 1
The http service of the geodata issued or web services, form 3-dimensional digital application program 2021 and install
On described virtual machine 202.Described 3D figure accelerates render farm 2042 for by described host 201
Three-dimensional rendering ability virtualization, it is achieved three-dimensional digital earth GPU(Graphic in virtualized environment
Processing Unit, graphic process unit) accelerate in real time to render；Described remote data transmission module 205
For realizing between described virtual machine 202 and described host 201 and described virtual machine 202 is with described
Between client device 3, the real-time Transmission of information is with mutual.
Further, described remote data transmission module 205 also includes compression module 2501 and decompression module
2502, the image information obtained after having been rendered by described host 201 is first compressed processing returning again
Pass to described virtual machine 202, then in described virtual machine 202, decompress described image information.
Concrete, it is VMGL(Virutal Machine Graphics that described 3D figure accelerates render farm 2402
Library, virtual machine graphics storehouse), as in figure 2 it is shown, described VMGL includes VMGL client and VMGL clothes
Business device end, described VMGL client obtains the solicited message of three-dimensional digital earth application program, at virtual machine
In reason thread, graphics process order being sent to described host, described VMGL server end calls at host
Reason thread, is rendered thread by VMGL and realizes acceleration and render, and the image information obtained after having rendered is carried out
Compression passes back to described three-dimensional digital earth application program end after processing.
In the present embodiment, described client device 3 is used for allowing user use described three-dimensional digital earth application journey
Sequence 2021, to show three-dimensional digital earth, can select be provided with remote desktop client (for
The system development remote desktop programs such as windows, linux, android or IOS) PC, thin client,
Mobile phone or panel computer.
The structure side of the three-dimensional digital earth that with as above three-dimensional digital earth system respond is described below
Method, as it is shown on figure 3, include step:
S101, building data, services cluster 1, acquisition process geodata also preserves, serviced by http or
Geodata after web services release processing.In the present embodiment, this step is particularly as follows: set up geography information
Data server (includes multiple data server 101 and database server 102), can respectively figurate number
According to server, image server, model server, vector server, database server and application program
Server；Gather geodata, process landform, image, model and vector data, make described data form
Unify and adapt to three-dimensional scenic to render；By uniform spaces coded method make landform geometry and data texturing according to
Coding one_to_one corresponding, carries out detail division to landform and image data, enables to adapt on a large scale
Contextual data Automatic dispatching, improves the rendering efficiency of large scale digital earth three-dimensional scenic；Big according to data volume
The little nodes with the access loading demand various server of size dynamic adaptation；By terrain data, image data,
Model data is issued as http service, and vector data is issued as web services.
S102, the http service integrating described geodata or web services, can to described geodata three-dimensional
Depending on changing and virtualization, and form three-dimensional digital earth application program；Three-dimensional rendering ability is virtualized, it is achieved
Three-dimensional digital earth GPU in virtualized environment accelerates to render in real time.
This step particularly as follows:
Build infrastructure services cluster 2, by the host 201 of infrastructure services cluster 2 generate virtual
Machine 202, described host 201 is configured with high performance professional graphic video card 203；In the present embodiment, use
The software infrastructure Eucalyptus increased income and the unified operating system mirror image of Virtual Machine Manager software development,
Generate virtual machine 202, create the user configuration information of virtual machine use for each user and be managed collectively, it is achieved
Operating system virtualizes；
In described virtual machine, three-dimensional digital earth engine is built by described market demand submodule 2041, whole
Close http service or the web services of the geodata that described data, services cluster is issued, to described geodata
Three-dimensional visualization and virtualization；Render farm 2042 is accelerated by the three of described host by described 3D figure
Dimension rendering capability virtualization, it is achieved three-dimensional digital earth GPU in virtualized environment accelerates to render in real time.
In the present embodiment, use OpenGL to write fundamental digital earth engine bottom, described data, services collection is mass-sended
The http service of the geodata of cloth or web services are incorporated into digital earth engine, are formed through software development
Three-dimensional digital earth application program 2021；The OpenGL that increases income supporting virtualized environment is used to render speed technology
VMGL provides function of hardware acceleration for described virtual machine；Described three-dimensional digital earth application program 2021 is installed
To the virtual machine 202 generated, run three-dimensional digital earth application program 2021 by virtual machine 202, by void
Plan machine sends mutual by remote data transmission module 205 to described host 201 and renders order, described
Three-dimensional scenic is rendered by the high performance video cards of host 201；Described host 201 passes through remote after having rendered
Rendering result is passed back to the application program end of described virtual machine 201 by journey data transmission module 205.Further
Ground, by the compression module 2501 in remote data transmission module 205 and decompression module 2502, first by institute
State image information compression and process application program 2021 end passing back to virtual machine 202 again, then described virtual
Machine 202 decompresses described image information.
S103, by using described three-dimensional digital earth application program 2021 to obtain the image of three-dimensional digital earth
Information, to show three-dimensional digital earth.In the present embodiment, by remote control protocol by described virtual machine 202
It is connected with client device 3, by client device 3 by using three-dimensional digital earth application program 2021,
Client device 3 shows three-dimensional digital earth.
In the present embodiment, user passes through client device 3(thin-client program) answering to virtual machine 202
Sending application request by program 2021, virtual machine application 2021 is according to request content, at virtual machine
Graphics process order is sent to described host 201 by reason thread；Host 201 carries out three-dimensional rendering, and
The image information obtained after having rendered passes back to virtual machine after being compressed processing by compression module 2501
Application program 2021 end；3-D view is believed by virtual machine application 2021 again by decompression module 2502
Breath passes client device 3 back, rather than three-dimensional information (applied business information, program interface information etc.) is by virtual
Machine 202 generates passes client device 3, three-dimensional information and non-three-dimensional information and client back by general remote agreement
End program collectively form user can the application program of client device 3, finally in client device 3
Display three-dimensional digital earth.
In other embodiment, another kind of optional compression with decompression scheme is, host 201
The three-dimensional image information rendered directly passes client device 3 back by compression module 2501 and decompression module 2502
(three-dimensional image information is without virtual machine application), the non-three-dimensional information of virtual machine 202 passes through general remote
Agreement passes client device 3 back, collectively form in client device 3 user can client device 3
Application program, finally shows three-dimensional digital earth in client device 3.The application of this mode virtual machine
Program will not produce three-dimensional picture, saves first compression and decompression work.
In sum, the three-dimensional digital earth construction method of support desktop virtualization applications proposed by the invention,
Rendering of three-dimensional geodata is put into the server end of virtual machine, and virtual-machine client receives rendering result also
Can control by real-time, interactive, it is achieved the mass data transmission problem that digital earth is applied is reduced to picture transfer and asks
Topic, eliminates the restriction to client devices computed ability and storage capacity, overcomes of the prior art three
The problem that dimension word earth application program is high to client device configuration performance requirement.
The above is only the detailed description of the invention of the application, it is noted that common for the art
For technical staff, on the premise of without departing from the application principle, it is also possible to make some improvements and modifications,
These improvements and modifications also should be regarded as the protection domain of the application.
Claims (8)
1. the construction method of a three-dimensional digital earth, it is characterised in that include step:
S101, acquisition process geodata also preserve, and are serviced by http or after web services release processing
Geodata；Wherein, step S101 specifically includes:
Gather geodata, process landform, image, model and vector data, make described landform, image,
Model and the uniform format of vector data also adapt to three-dimensional scenic and render；Make ground by uniform spaces coded method
Shape geometry and data texturing, according to coding one_to_one corresponding, carry out detail division to landform and image data,
Enable to adapt to large scale scene data Automatic dispatching；
According to data volume size and access loading demand size dynamic adaptation nodes；By terrain data, image
Data, model data are issued as http service, and vector data is issued as web services；
S102, the http service integrating described geodata or web services, can to described geodata three-dimensional
Depending on changing and virtualization, and form three-dimensional digital earth application program；Three-dimensional rendering ability is virtualized, it is achieved
Three-dimensional digital earth GPU in virtualized environment accelerates to render in real time；Wherein, step S102 specifically includes:
Use OpenGL to write fundamental digital earth engine bottom, the http of geodata is serviced or web
Service assembly, forms three-dimensional digital earth application program through software development；
Three-dimensional scenic is rendered the image information forming three-dimensional digital earth；
Described image information is passed back to the application program end of a virtual machine；
S103, by use described three-dimensional digital earth application program obtain three-dimensional digital earth image information,
To show three-dimensional digital earth.
The construction method of three-dimensional digital earth the most according to claim 1, it is characterised in that first will
Described image information compression processes the application program end passing back to a virtual machine again, then in described virtual machine
Decompress described image information.
The construction method of three-dimensional digital earth the most according to claim 2, it is characterised in that by far
Described virtual machine and a client device are connected by process control agreement, by described client device by using institute
State three-dimensional digital earth application program, client device shows three-dimensional digital earth.
4. a three-dimensional digital earth system, it is characterised in that including:
Data, services cluster, is used for processing geodata and preserving, and the geodata after release processing
Http service or web services；
Infrastructure services cluster, including host and the virtual machine that generated by host, described host
It is configured with figure video card；Described infrastructure services cluster also includes virtualize rendering module and teledata
Transport module, described virtualization rendering module includes that market demand submodule and 3D figure accelerate render farm,
Described market demand submodule integrates http service or the web of the geodata that described data, services cluster is issued
Service, forms three-dimensional digital earth application program and is arranged on described virtual machine；Described 3D figure accelerates wash with watercolours
Dye cluster is for virtualizing the three-dimensional rendering ability of described host, it is achieved three-dimensional digital earth is in virtualization
GPU in environment accelerates to render in real time；Described remote data transmission module is used for realizing described virtual machine and institute
State between host the real-time Transmission of information and mutual.
Three-dimensional digital earth system the most according to claim 4, it is characterised in that described 3D figure
Acceleration render farm is VMGL, and described VMGL includes VMGL client and VMGL server end, described VMGL
Graphics process order is sent to described host, described VMGL server end in described virtual machine by client
Realizing acceleration in described host to render, the image information obtained after having rendered passes back to described virtual
Machine.
Three-dimensional digital earth system the most according to claim 5, it is characterised in that described teledata
Transport module also includes compression module and decompression module, has obtained after described host has been rendered
Image information is first compressed processing and passes back to described virtual machine again, and then in described virtual machine, decompression is described
Image information.
Three-dimensional digital earth system the most according to claim 4, it is characterised in that described data, services
Cluster includes that data process submodule, data publication submodule and data base's submodule, and described data process son
Module is used for processing geodata, makes the uniform format of described geodata and adapts to three-dimensional scenic and render；Institute
State http service or the web services of the geodata after data publication submodule release processing；Described data base
Submodule is for storing the metadata required for described three-dimensional digital earth application program and attribute data.
8. according to the arbitrary described three-dimensional digital earth system of claim 4-7, it is characterised in that described void
Plan machine is connected by remote control protocol and a client device, and described client device is for by using institute
State three-dimensional digital earth application program, to show three-dimensional digital earth.
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| CN106257542A (en) * | 2016-01-28 | 2016-12-28 | 中国人民解放军装甲兵工程学院 | Method for visualizing based on digital earth and system |
| CN105868341B (en) * | 2016-03-29 | 2019-02-26 | 黄河勘测规划设计有限公司 | Three-dimensional digital earth platform construction method suitable for hydraulic engineering application |
| CN106296818A (en) * | 2016-08-23 | 2017-01-04 | 河南智绘星图信息技术有限公司 | A kind of terrestrial space scene simulation method and system based on mobile platform |
| CN108235057A (en) * | 2018-03-21 | 2018-06-29 | 中国科学院遥感与数字地球研究所 | A kind of network transmission and method for visualizing of extensive utilizing ocean current data |
| CN111488196B (en) * | 2020-04-13 | 2024-03-22 | 西安万像电子科技有限公司 | Rendering method and device, storage medium and processor |
| CN111935471B (en) * | 2020-08-14 | 2021-04-06 | 北京泽塔云科技股份有限公司 | Remote stereo graph generation system and method based on cloud service |
| CN112489210A (en) * | 2020-11-12 | 2021-03-12 | 广东省国土资源技术中心(广东省基础地理信息中心) | Method for constructing autonomous controllable three-dimensional natural resource map system |
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