CN106355640A - Ground-underground three-dimensional integrated space processing method and system - Google Patents

Abstract

The invention discloses a processing method and system for a three-dimensional integrated space above ground and underground. The method includes: stretching and modeling the two-dimensional graphics according to the data of the two-dimensional underground space facilities, and automatically constructing the three-dimensional model of the underground space facilities ; Taking the topography of the above-ground space facility as a reference, the topmost interface of the 3D model of the above-ground space facility and the 3D model of the underground space facility is intersected and cut, so as to realize the seamless integrated modeling of the above-ground space facility and the underground space facility, and obtain the above-ground space facility. Underground 3D integrated model; establish multiple levels of 3D space reference surfaces, judge the spatial position relationship between the viewpoint and the 3D space reference surface by ray discrimination, automatically switch between different spatial scenes and viewpoints, and smooth the viewpoint switching process, Realize the smooth transition browsing of the above-ground and underground 3D scenes. By adopting the present invention, the generation efficiency of the model can be improved to realize the integrated expression of above-ground space and underground space, and user experience can be improved.

Description

A processing method and system for a three-dimensional integrated space above ground and underground

technical field

The invention relates to the field of geographic information systems, in particular to a processing method and system for a three-dimensional integrated space above and below ground.

Background technique

The 21st century is the century for the development and utilization of underground space. As an important natural resource of the city, urban underground space resources have an important impact on the economic construction, civil defense construction, environmental construction and sustainable development of the city. The development and utilization of underground space cannot be separated from The existing urban underground space information and three-dimensional space analysis decision support system support.

The existing three-dimensional management system of urban aboveground or underground space has the following problems: ① In terms of research content, aboveground space and underground space facilities are separated: the research objects of the existing aboveground space three-dimensional system are mainly surface topography and texture, as well as ground Buildings and related facilities, and in the 3D system of underground space, it is either an independent 3D system for geological stratigraphic data, or an independent 3D system for underground pipelines, or an independent 3D system for underground civil air defense or traffic engineering. ② In terms of 3D data modeling, it is impossible to realize the integrated modeling of ground-surface-underground space objects: for example, although the 3D data model based on surface representation is convenient for surface display, texture mapping and data update, it is difficult to perform spatial analysis, while the volume-based Although the represented model can be used to express complex and heterogeneous objects, and is convenient for spatial operation and analysis, it has a large amount of data, complex algorithms, difficult construction, low geometric accuracy, and poor 3D graphics output. ③ In terms of data structure expression, the existing three-dimensional GIS (Geographic Information System, Geographic Information System) spatial data structure cannot express multiple spatial objects on the ground, surface, and underground at the same time; Visualization and related browsing and analysis of various space objects on the surface and underground. ④In terms of system functions, it is difficult for 3D visualization effects and powerful spatial analysis functions to coexist: due to the immature theory and technology of the existing 3D GIS spatial data model, the current 3D spatial modeling and 3D spatial analysis capabilities of the above-ground and underground space management system are extremely weak

Contents of the invention

The purpose of the embodiments of the present invention is to provide a processing method and system for a three-dimensional integrated above-ground and underground space, so as to realize the integrated expression of a three-dimensional above-ground and underground model.

In order to achieve the above purpose, an embodiment of the present invention provides a method for processing a three-dimensional integrated space above ground and underground, including:

According to the data of the two-dimensional underground space facilities, the two-dimensional graphics are stretched and shaped, and the three-dimensional model of the underground space facilities is automatically constructed;

Taking the terrain of the above-ground space facility as a reference, the topmost interface of the 3D model of the above-ground space facility and the 3D model of the underground space facility is intersected and cut to realize the seamless integrated modeling of the above-ground space facility and the underground space facility, and obtain the above-ground and underground space facilities. 3D integrated model;

Establish multiple levels of 3D space reference planes, judge the spatial position relationship between viewpoints and the 3D space reference planes by ray discrimination, automatically switch between different spatial scenes and viewpoints, and smooth the process of viewpoint switching to realize the integration of above-ground and underground 3D-scenes Smooth transition browsing.

Preferably, the method also includes:

According to hardware conditions and data processing content, predict the drawing time of each model that needs to be drawn in each frame;

Combine the visibility of the model and the importance calculation factor of the model to calculate the importance of each model in the screen;

According to the rendering time prediction results of the models and the importance calculation results, an appropriate level of detail is selected for each model so that the total rendering time of each frame does not exceed a preset threshold.

Preferably, the method also includes:

An integrated analysis is performed based on a variety of underground space data, and the integrated analysis includes one or more of spatial measurement analysis, geological stratum analysis, comprehensive analysis of pipelines and structures, and comprehensive analysis of pipelines and geological strata.

Preferably, the method also includes:

Through light map, bulletin board technology, animation texture and translucency, key areas are made into detailed scenes, and 3D roaming in the scene is realized in the form of avatars.

Preferably, the above-ground and underground three-dimensional integrated model adopts a tree-like data structure and hierarchical data organization, and different types of models are displayed in a loosely coupled manner.

Correspondingly, the present invention also provides a processing system for an above-ground and underground three-dimensional integrated space, including:

The underground space modeling module is used to stretch and shape the two-dimensional graphics according to the data of the two-dimensional underground space facilities, and automatically construct the three-dimensional model of the underground space facilities;

The integrated modeling module is used to intersect and cut the topmost interface of the 3D model of the above-ground space facility and the 3D model of the underground space facility with reference to the terrain of the above-ground space facility, so as to realize the seamless connection between the above-ground space facility and the underground space facility Integrated modeling to obtain a three-dimensional integrated model of the ground and underground;

The scene transition module is used to establish a multi-level three-dimensional space reference plane, judge the spatial position relationship between the viewpoint and the three-dimensional space reference plane by ray discrimination, automatically switch between different space scenes and viewpoints, and smooth the viewpoint switching process, Realize the smooth transition browsing of the above-ground and underground 3D scenes.

Preferably, the system also includes:

The drawing time prediction module is used to predict the drawing time of each model that needs to be drawn in each frame according to hardware conditions and data processing content;

The importance calculation module is used to calculate the importance of each model in the screen by combining the visibility of the model and the importance calculation factor of the model;

The level of detail selection module is used to select an appropriate level of detail for each model according to the prediction result of the drawing time of the model and the result of the importance calculation, so that the total drawing time of each frame does not exceed a preset threshold.

Preferably, the system also includes:

The integrated analysis module is used to perform integrated analysis based on various underground space data, and the integrated analysis includes one or more of spatial measurement analysis, geological stratum analysis, comprehensive analysis of pipelines and structures, and comprehensive analysis of pipelines and geological strata. Various.

Preferably, the system also includes:

The simulation browsing module is used to make key areas into fine scenes through light map, bulletin board technology, animation texture and translucency, and realize three-dimensional roaming in the scene in the form of avatars.

Preferably, the above-ground and underground three-dimensional integrated model adopts a tree-like data structure and hierarchical data organization, and different types of models are displayed in a loosely coupled manner.

The invention adopts a rule-based algorithm, stretches and shapes the two-dimensional graphics according to the two-dimensional underground space facility data, and automatically constructs the three-dimensional model in real time, thereby improving the generation efficiency of the model. Through the intersecting and cutting of the topmost interface of the above-ground model and the underground model, the above-ground model and the underground model are seamlessly integrated and modeled to realize the integrated expression of multi-category spatial entities, which is conducive to improving the expressiveness of the entire underground space scene. At the same time, the present invention is also based on multi-level reference planes, uses the ray discrimination method to judge the three-dimensional spatial position relationship of the model, automatically switches between different reference planes and viewpoints, and realizes smooth transition browsing of above-ground and underground scenes, which is beneficial to enhancing user experience.

Description of drawings

Fig. 1 is a method flow chart of an embodiment of the processing method of the above-ground and underground three-dimensional integrated space provided by the present invention;

Fig. 2 is a method flowchart of another embodiment of the processing method of the above-ground and underground three-dimensional integrated space provided by the present invention;

Fig. 3 is a schematic structural diagram of an embodiment of a processing system for a three-dimensional integrated above-ground and underground space provided by the present invention.

Fig. 4 is a structural schematic diagram of another embodiment of the processing system for the above-ground and underground three-dimensional integrated space provided by the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to FIG. 1 , it is a method flowchart of an embodiment of the method for processing a three-dimensional integrated above-ground and underground space provided by the present invention.

As shown in Figure 1, the processing method for the above-ground and underground three-dimensional integrated space includes:

S11. According to the data of the two-dimensional underground space facilities, the two-dimensional graphics are stretched and shaped, and the three-dimensional model of the underground space facilities is automatically constructed.

The invention adopts a rule-based algorithm, stretches and shapes the two-dimensional data according to the two-dimensional underground space facility data, and generates three-dimensional data in real time. Taking the subway tunnel as an example, the 3D subway tunnel model is generated in real time through information such as the centerline, width, height and shape (such as spindle, arch and rectangle) of the subway. Although the 3D model constructed automatically is not as detailed as the fine model, it reflects the utilization of underground space and can be used for corresponding measurement and analysis. important data source. In this embodiment, the three-dimensional model of the space facility on the ground can be modeled using an existing method, such as a three-dimensional modeling method based on three-dimensional laser scanning, etc., which is not limited in the present invention.

S12. Taking the topography of the above-ground space facility as a reference, the topmost interface of the 3D model of the above-ground space facility and the 3D model of the underground space facility is intersected and cut, so as to realize the seamless integrated modeling of the above-ground space facility and the underground space facility, and obtain A three-dimensional integrated model of the ground and underground.

Since the three-dimensional model of the above-ground space facility (hereinafter referred to as the above-ground model, including the above-ground building model and the above-ground landscape model, etc.) and underground structure models, etc.), the topmost interface is also the topography of the surface, and there may be problems such as intersections and gaps between the underground model and the above-ground model. Therefore, the intersection of the ground model and the underground model in the present invention is essentially the intersection of the two terrain models. For example, in the specific implementation, the terrain of the above-ground building model can be used as a reference, and the topmost interface of the above-ground building model and the underground stratum model can be intersected and cut to realize the seamless integrated modeling of the above-ground building model and the underground stratum model.

In the specific implementation, the integrated modeling of ground objects and terrain is firstly carried out, and the 3D model of the ground buildings is first established, and then the bottom contour points of the ground buildings are used as constraints to update the terrain model. The topmost interface of the 3D model of underground space facilities is the updated terrain model. Using the updated terrain model as a geometric constraint, the underground structure model and the underground stratum model are modeled, and the terrain is used as the topmost slice cutting to realize the above-ground building model. Integrate seamlessly with underground space facility models.

Among them, the geological body is composed of upper and lower horizons and boundaries corresponding to the strata; for regular layered strata, it can be directly simulated by multi-layer TIN (Triangulated Irregular Network, irregular triangular network) model; for irregular The formations can be sorted and assigned codes, so that each drill hole in the formation cannot repeatedly cross a certain type of formation, and the overall drilling through the formation must be orderly, that is, the connection lines of corresponding layers between any adjacent drilling holes must not intersect .

The above-ground and underground three-dimensional integrated model adopts a tree-like data structure and a hierarchical data organization, and the ground, strata, boreholes and pipelines represent different leaf nodes. Different types of models are displayed in a loosely coupled manner, and ground, strata, boreholes, and pipelines can be displayed simultaneously, and loosely combined according to analysis needs.

S13, establishing multiple levels of three-dimensional space reference planes, judging the spatial position relationship between viewpoints and the three-dimensional space reference planes through ray discrimination, automatically switching between different spatial scenes and viewpoints, and smoothing the process of viewpoint switching, so as to realize above-ground and underground three-dimensional Smooth transition browsing of scenes.

For the above-ground and underground space areas, the traditional 3D GIS software generally expresses the above-ground and underground spaces separately by switching spaces, and cannot express the above-ground space and underground space objects in an integrated manner, and in the underground space due to the existence of structures Many types of spatial entities, such as geological strata and geological strata, require a more flexible degree of freedom of viewing angle in order to operate the underground three-dimensional space more smoothly. The present invention judges the three-dimensional space position by setting up multiple levels of three-dimensional space reference planes (such as the terrain reference plane for dividing the above-ground and underground space), and through the ray discrimination method ((a ray is sent from the viewpoint to judge the spatial position relationship with the three-dimensional model)) relationship, to determine whether the current viewpoint is on the ground or underground, when approaching the critical reference plane, automatically raise or lower the viewpoint, switch between different spatial scenes, and automatically switch viewpoints at the same time, and smooth the viewpoint switching process.

It can be seen that the present invention adopts a rule-based algorithm, stretches and shapes the two-dimensional graphics according to the two-dimensional underground space facility data, and automatically constructs the three-dimensional model in real time, thereby improving the generation efficiency of the model. Through the intersecting and cutting of the topmost interface of the above-ground model and the underground model, the above-ground model and the underground model are seamlessly integrated and modeled to realize the integrated expression of multi-category spatial entities, which is conducive to improving the expressiveness of the entire underground space scene. At the same time, the present invention is also based on multi-level reference planes, uses the ray discrimination method to judge the three-dimensional spatial position relationship of the model, automatically switches between different reference planes and viewpoints, and realizes smooth transition browsing of above-ground and underground scenes, which is beneficial to enhancing user experience.

Referring to FIG. 2 , it is a method flowchart of another embodiment of the method for processing a three-dimensional integrated above-ground and underground space provided by the present invention. This embodiment further includes on the basis of the embodiment shown in Figure 1:

S14. Predict the drawing time of each model that needs to be drawn in each frame according to hardware conditions and data processing content.

S15. Combining the visibility of the model and the importance calculation factor of the model, calculate the importance of each model in the screen.

S16. According to the prediction result of the rendering time of the model and the calculation result of the importance, select an appropriate level of detail for each model, so that the total rendering time of each frame does not exceed a preset threshold.

Aiming at the online real-time visualization application of the above-ground and underground three-dimensional integrated model, the present invention proposes a time-limited self-adaptive visualization technical framework, focuses on analyzing the relevant factors in the two stages of data loading and rendering that seriously affect the rendering frame rate, and establishes a A quantitative time estimation model, according to the hardware conditions and data processing content of the system, accurately predicts the time required to draw the scene content in each frame, and provides a basis for adaptively adjusting the data loading and drawing process. The concept of model visibility is proposed, and it is used in combination with the preset object importance calculation factor to keep the details of important objects as much as possible in the case of time constraints; a time-limited adaptive LOD (Levels of Detail , Level of Detail) selection algorithm, based on the object's drawing time estimation and importance calculation results, selects the appropriate LOD level for each model so that the total drawing time does not exceed the budget.

Through the time-limited adaptive visualization method of the model, the frame rate of 3D scene browsing is improved, and at the same viewpoint, the scene range loading performance is greatly enhanced. For example, the ground model, underground pipeline model and underground structure model can be loaded at the same time under the current viewpoint, and the data of 3 square kilometers can be dispatched on a common PC (Personal Computer, personal computer), and the frame rate of 22fps can be achieved.

S17. Perform integrated analysis based on various underground space data, the integrated analysis includes one or more of spatial measurement analysis, geological stratum analysis, comprehensive analysis of pipelines and structures, and comprehensive analysis of pipelines and geological strata.

By adopting the present invention, the functions of two-dimensional and three-dimensional integration of data model and data structure, two-dimensional and three-dimensional data management based on spatial database, high-end three-dimensional analysis and modeling, and direct operation of two-dimensional GIS analysis in three-dimensional environment can be realized. , can add ArcSDE (ArcGIS spatial data engine) data in real time or link with 2D GIS. Under the integrated technology system of 2D and 3D, most of the query (including attribute query and spatial query) and analysis functions of 2D GIS can be used in the 3D environment of the system.

The space measurement and analysis includes vertical distance measurement, ground surface area measurement, statistical analysis of pipeline segments, statistical analysis of pipelines in self-defined areas, and the like. The geological stratum analysis includes geological layer stripping analysis and geological body internal excavation tunnel analysis, etc. The analysis of underground space is not only the analysis of underground pipelines or geological strata, but a comprehensive problem, such as excavation analysis, not only You just need to know how much pipeline needs to be moved, and you also need to know how much earthwork needs to be removed. In places where there are subways, it is also necessary to know whether the excavation will affect the subway tunnel. Therefore, although it is the same excavation operation, it needs to obtain a lot of information support and analyze different data models. The comprehensive analysis of pipelines and structures includes surface excavation analysis and tunnel excavation analysis. The comprehensive analysis of pipelines and geological strata includes excavation and filling analysis and the like.

S18, through light map, bulletin board technology, animation texture and translucency, the key areas are made into fine scenes, and the three-dimensional roaming in the scene is realized in the form of avatars.

The present invention can accurately represent surface buildings, urban components, underground pipelines, and other equipment and facilities. Through light mapping, the scene has very realistic static light and shadow effects. Various special features such as flake trees, fountains, fireworks, water ripples, billboards, glass effects and hollowing out can be realized to enhance the sense of reality. Key areas, buildings and planning schemes can be made into detailed scenes and controlled independently. For vector lines and planes, the present invention provides two modes, including vector drawing mode and real-time rasterization mode, which support translucency, gradient, automatic ground and color settings, etc., and can be marked with ground for vectors. It can simulate the walking, running and jumping of real people in the scene, and realize the 3D virtual community based on the real geographical environment. At the same time, it also supports simulating the roaming of various moving objects such as cars, airplanes and ships in the scene.

Referring to Fig. 3, it is the processing system for the above-ground and underground three-dimensional integrated space provided by the present invention. This embodiment is consistent with the basic principle of the method embodiment shown in FIG. 1 . For details not described in this embodiment, refer to the relevant description in the embodiment shown in FIG. 1 .

The processing system for the above-ground and underground three-dimensional integrated space includes:

The underground space modeling module 31 is used for stretching and modeling the two-dimensional graphics according to the data of the two-dimensional underground space facilities, and automatically constructing the three-dimensional model of the underground space facilities;

The integrated modeling module 32 is used to intersect and cut the topmost interface of the three-dimensional model of the above-ground space facility and the three-dimensional model of the underground space facility with the terrain of the above-ground space facility as a reference, so as to realize the seamless integration of the above-ground space facility and the underground space facility. Joint integrated modeling to obtain a three-dimensional integrated model of the ground and underground;

The scene transition module 33 is used to establish multiple levels of three-dimensional space reference surfaces, judge the spatial position relationship between the viewpoint and the three-dimensional space reference surface by ray discrimination, automatically switch between different spatial scenes and viewpoints, and smooth the process of viewpoint switching , to realize the smooth transition browsing of 3D scenes above and below ground.

Preferably, the above-ground and underground three-dimensional integrated model adopts a tree-like data structure and hierarchical data organization, and different types of models are displayed in a loosely coupled manner.

Referring to FIG. 4 , it is a structural schematic diagram of another embodiment of the processing system for the above-ground and underground three-dimensional integrated space provided by the present invention. The basic principle of this embodiment is consistent with that of the embodiment shown in FIG. 2 . For details not described in this embodiment, please refer to the relevant description in the embodiment shown in FIG. 2 .

This embodiment further includes on the basis of the embodiment shown in Figure 3:

The drawing time prediction module 34 is used to predict the drawing time of each model that needs to be drawn in each frame of the picture according to hardware conditions and data processing content;

The importance calculation module 35 is used to calculate the importance of each model in the screen in combination with the visibility of the model and the importance calculation factor of the model;

The level of detail selection module 36 is configured to select an appropriate level of detail for each model according to the prediction result of the drawing time of the model and the result of the importance calculation, so that the total drawing time of each frame does not exceed a preset threshold.

Further, the system also includes:

The integrated analysis module 37 is used to perform integrated analysis based on various underground space data, and the integrated analysis includes one of spatial measurement analysis, geological stratum analysis, comprehensive analysis of pipelines and structures, and comprehensive analysis of pipelines and geological strata or more.

The simulated browsing module 38 is used to make key areas into detailed scenes through light map, bulletin board technology, animation texture and translucency, and realize three-dimensional roaming in the scene in the form of avatars.

In summary, the present invention comprehensively uses advanced information technologies such as virtual reality, three-dimensional visualization and spatial analysis, GIS, database, and three-dimensional laser scanning, and adopts different modeling methods for different types of space facilities. Data display and storage technologies such as data structure, hierarchical data organization, and standardized XML format have realized the 3D model of the city on the ground (buildings, roads, and green spaces, etc.), the topography of the surface (DEM+DOM), and the underground space. The integrated modeling of facilities (underground pipelines, geological formations, subways, APM and other underground facilities) not only has good 3D visualization effects, but also has powerful 3D spatial analysis and decision support functions. It not only provides accurate and detailed spatial information for the planning, design, construction, operation and maintenance management of the underground space in the region, but also provides a visual spatial auxiliary decision-making platform for the rational development and utilization of underground space.

It should be noted that the system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physically separated. A unit can be located in one place, or it can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the device embodiments provided by the present invention, the connection relationship between the modules indicates that they have a communication connection, which can be specifically implemented as one or more communication buses or signal lines. It can be understood and implemented by those skilled in the art without creative effort.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be realized by means of software plus necessary general-purpose hardware. Special components, etc. to achieve. In general, all functions completed by computer programs can be easily realized by corresponding hardware, and the specific hardware structure used to realize the same function can also be varied, such as analog circuits, digital circuits or special-purpose circuit etc. However, software program implementation is a better implementation mode for the present invention in most cases. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product is stored in a readable storage medium, such as a floppy disk of a computer , U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc., including several instructions to make a computer device (which can be A personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (10)

1. a kind of processing method in above and below ground three-dimensional integratedization space is it is characterised in that include:

According to the data of two-dimentional underground space facility, X-Y scheme is stretched and moulding, automatically built underground space facility Threedimensional model；

With the landform of aboveground space facility as reference, by the three-dimensional mould of the threedimensional model of aboveground space facility and underground space facility The top interface of type carries out asking friendship cutting, realizes the Seamless integration- modeling of aboveground space facility and underground space facility, obtains Above and below ground three-dimensional integratedization model；

Set up the three dimensions plane of reference of multiple levels, viewpoint and the described three dimensions plane of reference are judged by ray diagnostic method Spatial relation, automatically switch different spatial scenes and viewpoint, and the process of smooth viewpoint switch, realizes above and below ground three Seamlessly transitting of scene of dimension browses.

2. above and below ground as claimed in claim 1 three-dimensional integratedization space processing method it is characterised in that methods described also Including:

According to hardware condition data process content, the drafting time needing each model drawn in each frame picture is carried out Prediction；

The importance of the visuality of combination model and model calculates the factor, and the importance of each model in picture is counted Calculate；

Drafting time prediction result according to model and importance result of calculation, select suitable levels of detail for each model Secondary, so that total drafting time of each frame picture is without departing from default threshold value.

3. above and below ground as claimed in claim 1 three-dimensional integratedization space processing method it is characterised in that methods described also Including:

Carry out integrated analysis based on multiple underground space data, described integrated analysis include spatial measuring analysis, quality Layer analysis, pipeline and structures comprehensive analysis and one or more of pipeline and geo-logical terrain comprehensive analysis.

4. above and below ground as claimed in claim 1 three-dimensional integratedization space processing method it is characterised in that methods described also Including:

By way of light-maps, billboarding, cartoon grain and translucentization, key area is fabricated to fine field Scape, realizes the three-dimensional range in scene in the way of incarnation.

5. the above and below ground three-dimensional integratedization space as described in any one of Claims 1 to 4 processing method it is characterised in that Described above and below ground three-dimensional integratedization model adopts the data tissue of tree-shaped data structure and layering, between different types of model Shown using loosely-coupled mode.

6. a kind of processing system in above and below ground three-dimensional integratedization space is it is characterised in that include:

Underground space MBM, for the data according to two-dimentional underground space facility, is stretched to X-Y scheme and moulding, Automatically build the threedimensional model of underground space facility；

Integrated moulding module, for the landform of aboveground space facility as reference, by the threedimensional model of aboveground space facility with ground The top interface of the threedimensional model of lower space facility carries out asking friendship cutting, realizes aboveground space facility and underground space facility Seamless integration- models, and obtains above and below ground three-dimensional integratedization model；

Scene transition module, for setting up the three dimensions plane of reference of multiple levels, judges viewpoint and institute by ray diagnostic method State the spatial relation of the three dimensions plane of reference, automatically switch different spatial scenes and viewpoint, and smooth viewpoint switch Process, realizes seamlessly transitting of above and below ground three-dimensional scenic and browses.

7. the processing system wanting above and below ground three-dimensional integratedization space as described in 6 as right is it is characterised in that described system is also wrapped Include:

Draw time prediction module, for according to hardware condition data process content, to need in each frame picture to draw The drafting time of each model is predicted；

Importance computing module, the importance of the visuality for combination model and model calculates the factor, in picture each The importance of model is calculated；

Level of detail chooses module, for the drafting time prediction result according to model and importance result of calculation, for each Model selects suitable level of detail, so that total drafting time of each frame picture is without departing from default threshold value.

8. the processing system wanting above and below ground three-dimensional integratedization space as described in 6 as right is it is characterised in that described system is also wrapped Include:

Integrated analysis module, for carrying out integrated analysis based on multiple underground space data, described integrated analysis include In spatial measuring analysis, geo-logical terrain analysis, pipeline and structures comprehensive analysis and pipeline and geo-logical terrain comprehensive analysis One or more.

9. the processing system wanting above and below ground three-dimensional integratedization space as described in 6 as right is it is characterised in that described system is also wrapped Include:

Simulation browsing module, for by way of light-maps, billboarding, cartoon grain and translucentization, by emphasis Region is fabricated to fine scene, realizes the three-dimensional range in scene in the way of incarnation.

10. the processing system in the above and below ground three-dimensional integratedization space as described in right wants 6～9 any one is it is characterised in that institute State the data tissue that above and below ground three-dimensional integratedization model adopts tree-shaped data structure and layering, adopt between different types of model Shown with loosely-coupled mode.