CN111161417A - Method for constructing three-dimensional data model based on real estate registration result - Google Patents
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Abstract
The invention discloses a method for constructing a three-dimensional data model based on a real estate registration result, which comprises the following steps: 1) converting a layered household graph in the real estate registration result into an shp format; 2) carrying out topology processing on the converted shp-format layered household graph data; 3) creating a two-dimensional vector data set formed by overlapping a plurality of floor elements of a building from a base layer in sequence; 4) stretching geometric objects in the two-dimensional vector data set from a base layer in sequence according to the layer number information, and setting the stretching height according to the actual layer height of the building to generate a three-dimensional white mould of the building with a multi-layer structure; 5) performing style and texture mapping on the stretched three-dimensional white mould; 6) the building three-dimensional model is associated with business attribute data in the real estate registration effort. By the method, the three-dimensional data model meeting the real estate service management requirement can be constructed without additionally spending a large amount of manpower and material resources to collect the building site data.
Description
Technical Field
The invention relates to the technical field of real estate registration, in particular to a method for constructing a three-dimensional data model based on real estate registration results.
Background
The data model is constructed based on the real estate registration result, namely the data model meeting the real estate service management requirement is constructed based on the existing real estate registration data on the premise that a large amount of manpower and material resources are not needed to be additionally spent for acquiring field data.
The prior real estate registration of China is implemented by different departments according to different real estate management departments, is in a decentralized management state, and basically adopts a management system based on a two-dimensional plane. To further standardize the real estate market and related real estate management, the nation has been implementing a unified real estate registration system. In 2007, the 'property right law' promulgates the unified registration system of real estate by the specific country. In 2013, according to the reform and function change scheme of the state department, the state resource department at that time is responsible for guiding and supervising the unified registration responsibility of real properties such as national land, houses, grasslands, woodlands, sea areas and the like, and basically achieves four unifications of a registration organization, a registration book, a registration basis and an information platform.
Since real estate rights include land ownership, land use rights, building ownership, homestead use rights, country-owned forest use rights, grassland meadow contract rights, country-owned forest contract rights, sea use rights, etc., nothing is based on accurate positioning of space and boundaries, requiring that uniform registration of real estate must be established on an accurate geographic information system. In recent years, geographic information technology has been widely used in real estate management, and a transition from the initial two-dimensional geographic information system to the management of a three-dimensional geographic information system is progressing. The three-dimensional geographic information system can generate a surface three-dimensional model by utilizing a high-resolution satellite image, an aerial photo and a digital elevation model, and then superimposes space vector data, surface feature interest points and three-dimensional building model data to form a visual three-dimensional digital landscape of an area or a city, so that the visual three-dimensional digital landscape can be more visually and visually used for real estate registration management, and the decision level of the government is improved.
The existing three-dimensional technology of building models is stopped on the shapes and the outer facades of buildings, the external appearance is kept consistent with the current situation by manually acquiring photos and manually modeling, the information of the internal structure, the house type division and the property right of each building cannot be detailed, and the current situation is inconsistent with the specific requirements of real estate service management. Further, there is no photograph of the complete facade of the building in the existing real estate registration data.
In addition, the conventional three-dimensional building model data is stored in a file format based on three-dimensional building model files such as 3dml and 3dmx and facade picture files such as jpeg, and there are problems of difficulty in updating, complexity in a model generation process, and the like. The present invention also aims to propose an improvement to this problem.
Disclosure of Invention
The invention mainly aims to provide a method for constructing a three-dimensional data model of a building based on the actual situation of data in the real estate service management process.
The real estate registration result data mainly includes graphic data and business attribute data of the building. In the real estate service management process, the graphic data of the building is usually two-dimensional data which is stored in a CAD format or an shp format and contains coordinate information in x and y directions, and the positions of all components including a house, a core barrel, an overhead structure, a hall, an air shaft and the like on a floor plane are displayed mainly through a layered household graph. Based on the above actual situation, the proposed solution is as follows: a method for constructing a three-dimensional data model based on real estate registration results comprises the following steps:
step 1) format conversion: converting a layered household graph in the real estate registration result into an shp format;
step 2) data processing: carrying out topology processing such as segmentation, closure, combination and the like on the converted shp-format layered household graph data so as to accord with the topology specification of the space elements, wherein each household corresponds to an independent closed shape element after the processing;
step 3) matching layer elements and user elements by taking the base data of the natural building space as reference, and creating a two-dimensional vector data set formed by overlapping a plurality of floor elements of the building from the base layer in sequence, wherein the two-dimensional vector data set is similar to the projection overlapping of each layer structure in the building on a horizontal plane;
step 4) stretching geometric objects in the two-dimensional vector data set from a base layer in sequence according to the layer number information, wherein the stretching height is set according to the actual layer height of the building, and a three-dimensional white mould of the building with a multi-layer structure is generated;
step 5) carrying out style and texture mapping on the stretched three-dimensional white mold;
and 6) associating the building three-dimensional model with the service attribute data in the real estate registration result.
And step 4) specifically using software CityEngine to realize batch modeling by setting a rule file on the basis of two attributes of the building shape and the building height.
Step 6) concrete process: and hooking the shape elements in the three-dimensional model with the real estate unit service number, clicking any position of the three-dimensional model in the real estate three-dimensional data application process, acquiring the real estate unit service number corresponding to the unit model, and inquiring the service attribute information corresponding to the number based on the unique service number.
Aiming at the problems stated in the background art that the traditional three-dimensional building model data is stored in a file format, the updating is difficult, the model generating process is complex and the like, the invention provides the following improvement scheme:
through research and analysis of the current data and the prior art, if the three-dimensional data model can be displayed in real time in the real estate registration management service transaction process, the data storage mode of the three-dimensional data model is different from the mainstream storage mode in a file format, so that the data of the data model adopts a storage mode based on a space library (ARC SDE).
Has the advantages that:
1) by the method, the three-dimensional data model meeting the real estate service management requirement can be constructed without additionally spending a large amount of manpower and material resources to collect the building site data, so that the personnel and capital investment can be greatly reduced; moreover, the method can be used for quickly producing building model data in batches and in a large range;
2) in the data storage process, the storage mode uniformly adopts the database for storage, the storage occupation is relatively less due to the fact that the x, y and z coordinate point position information is stored in the database compared with the mode of storing model data and texture photos in a traditional file storage mode, and in the later application process of data, only one set of interfaces or services are needed to realize the application of the data because gis technology is used for storage and service.
Drawings
FIG. 1 is a plan view of layer 1;
FIG. 2 is a plan view of layers 2-17;
fig. 3 is a plan view of the antenna layer.
Detailed Description
The following specifically describes the method for constructing a three-dimensional data model based on real estate registration results of the present invention, taking the real estate registration results data of Guangdong province as an example.
The Guangdong province real estate registration result data mainly comprises a hierarchical household graph and business attribute data of the building. The graphic data is typically stored in a CAD format and the business attribute data is typically stored in a data table format, such as an xlsx format data table.
The hierarchical household drawings in the CAD format are shown in FIGS. 1-3, and the layout of each layer is shown separately according to the appointed proportion, for example, FIG. 1 shows a plan view of the 1 st layer, FIG. 2 shows a plan view of 2-17 layers, and FIG. 3 shows a plan view of a roof layer. The layered household graph is mainly used for displaying the position relation of all the components such as all the unit households, core barrels, overhead houses, halls, air shafts and the like. In CAD, it represents a component element in a closed figure.
The method for constructing the three-dimensional data model based on the real estate registration result comprises the following specific steps:
step 1) format conversion: and importing the corresponding hierarchical user-divided graphs in the CAD format into arcgis software in the same batch by taking a natural building as a unit, converting the hierarchical user-divided graphs into a shp (short for shape) format, and selecting a surface graph layer.
Step 2) data processing: and performing topology processing such as segmentation, closure, combination and the like on the converted shp-format layered household graph data by using a data processing tool provided by arcgis software, wherein each household corresponds to an independent closed form factor, for example, a balcony and a unit household in the graph 2 are combined to meet the topological specification of the space elements.
Step 3), overlaying layers: matching layer elements and user elements (including the ground and the underground) by taking natural building space base data (the natural building space base data refers to data described according to the mapping shape of the surface of the building) as reference, and creating a two-dimensional vector data set formed by stacking a plurality of floor elements of the building from the base layer in sequence, wherein the two-dimensional vector data set is similar to the projection stacking of each layer structure in the building on a horizontal plane. The left list area of the processed data has a record of a graph representing a floor.
And 4) stretching the geometric objects in the two-dimensional vector data set from the base layer in sequence according to the layer number information, wherein the stretching height is set according to the actual layer height (recorded in the file) of the building, and a three-dimensional white model of the building with a multi-layer structure is generated.
Specifically, software, c, e, c, e, g, c, e, g, n, e, g, e, g, e.
Taking CityEngine Advanced 2016.0 as an example
Rule preparation
(1) Common rules
t (tx, ty, tz) translation
r (rx, ry, rz) rotation
s (sx, sy, sz) shape adjustment
center-selector set to the center of plane i ("facets/window. obj") instead of other model extreme (18) stretch
split (z) {2: r (0,0,0) center (xyz) X } cut
(2) Use example
Lot-->
extrude(20)split(x){
2:color("#ff0000")X|2:color(1,0,0)X|
2:set(material.color.r,1.0)set(material.color.g,0)set(material.color.b,0)X
}
Lot-->extrude(10)Mass
Mass-->comp(f){top:Top|all:X}Top-->roofPyramid(30)Roof
split(splitAxis){size1:operations1|size2:operations2|...|sizen-1:operationsn-1}split(splitAxis){size1:operations1|size2:operations2|...|sizen-1:operationsn-1}*split(splitAxis,adjustSelector){size1:operations1|...|sizen-1:operationsn-1}split(splitAxis,adjustSelector){size1:operations1|...|sizen-1:operationsn-1}*
And compiling a corresponding rule file according to the production data model.
1. Creating a new project
File → New → project, click Next, click Finish.
2. Creating a new scene
File → New → scene, e.g. scene File New _ scene.cej, scene File is typically placed in the scenes folder.
3. And putting the required various resources into the assets folder.
4. Data (GIS data) is placed in a data folder.
5. Creating/importing street network data
Creating a street network: graph → Grow Streets click on Aply and Close using default settings.
6. Endowing CGA rule files
The architecture in the CityEngine is described using the CGA file.
Step 5) carrying out style and texture mapping on the stretched three-dimensional white mold, namely film pasting
Specifically, the method comprises the following steps: and setting style and texture mapping on the stretched three-dimensional white mold according to the rules of projecting the structure, the ownership relation and the ownership range outside the house, and finally generating a building three-dimensional model with a multi-floor and multi-room structure.
And 6) associating the building three-dimensional model with the service attribute data in the real estate registration result.
The method comprises the steps of mapping and hanging shape elements in a three-dimensional model and service attribute data, specifically hanging the shape elements in the three-dimensional model and real estate unit service numbers, acquiring real estate unit service numbers corresponding to the unit models by clicking any position of the three-dimensional model in the real estate three-dimensional data application process, and then inquiring service attribute information corresponding to the numbers based on the unique service numbers.
In addition, the data of the data model of the invention adopts a storage mode based on an ARCSDE, the online use and management of the data can be realized by using a universal rule through the data base storage model, the outer facade texture (selected according to the building structure and materials) and the real estate service attribute data, compared with the traditional file storage mode, the data storage mode of the invention uniformly adopts the data base for storage, the x, y and z coordinate point position information is stored in the data base, the storage occupation is relatively less compared with the mode of storing the model data and the texture photos in the traditional file storage mode, the application of the data can be realized only by using one set of interface or service in the later application process of the data because the mode of using gis technology for storage and service, compared with the traditional file storage mode, the data storage mode of the invention does not need to call the model service, The invention provides a plurality of interfaces such as space data service, and the like, which is more convenient to service, and the loading and displaying speed of the model can be improved.
Claims (4)
1. A method for constructing a three-dimensional data model based on real estate registration results is characterized by comprising the following steps:
step 1) format conversion: converting a layered household graph in the real estate registration result into an shp format;
step 2) data processing: carrying out topology processing on the converted shp-format layered user graph data, including segmentation, closing and combination so as to meet the topological specification of the space elements, wherein each user corresponds to an independent closed shape element after the processing;
step 3) matching layer elements and user elements by taking the base data of the natural building space as reference, and creating a two-dimensional vector data set formed by overlapping a plurality of floor elements of the building from the base layer in sequence, wherein the two-dimensional vector data set is similar to the projection overlapping of each layer structure in the building on a horizontal plane;
step 4) stretching geometric objects in the two-dimensional vector data set from a base layer in sequence according to the layer number information, wherein the stretching height is set according to the actual layer height of the building, and a three-dimensional white mould of the building with a multi-layer structure is generated;
step 5) carrying out style and texture mapping on the stretched three-dimensional white mold;
and 6) associating the building three-dimensional model with the service attribute data in the real estate registration result.
2. The method for constructing the three-dimensional data model based on the real estate registration result according to claim 1, wherein step 4) specifically uses software, type Engine, to realize batch modeling by setting a rule file on the basis of two attributes of building shape and building height.
3. The method for building the three-dimensional data model based on the real estate registration achievement according to claim 1, wherein the step 6) is a concrete process: and hooking the shape elements in the three-dimensional model with the real estate unit service number, clicking any position of the three-dimensional model in the real estate three-dimensional data application process, acquiring the real estate unit service number corresponding to the unit model, and inquiring the service attribute information corresponding to the number based on the unique service number.
4. The method for building a three-dimensional data model based on real estate registration efforts of claim 1 wherein the data of the data model is stored in a spatial library based storage manner.
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| CN112017077A (en) * | 2020-08-28 | 2020-12-01 | 南昌市国土资源勘测规划院有限公司 | Real estate registration platform, paperless business handling and 3D live-action model display mode |
| CN114037808A (en) * | 2022-01-10 | 2022-02-11 | 武大吉奥信息技术有限公司 | High-simulation white modulus data production method |
| US11430076B1 (en) * | 2018-05-24 | 2022-08-30 | Zillow, Inc. | View scores |
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Cited By (13)
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| US11769181B2 (en) | 2006-02-03 | 2023-09-26 | Mftb Holdco. Inc. | Automatically determining a current value for a home |
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| CN115222873A (en) * | 2022-05-19 | 2022-10-21 | 南京信息工程大学 | Three-dimensional property picture batch association method based on annotation and spatial semantics |
| CN116956423A (en) * | 2023-07-27 | 2023-10-27 | 重庆市规划和自然资源调查监测院 | Automatic modeling method and system based on property layering household map |
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| CN117540458A (en) * | 2023-10-31 | 2024-02-09 | 重庆市规划和自然资源信息中心 | Building full-space full-element real estate modeling method |
| CN117540458B (en) * | 2023-10-31 | 2024-05-28 | 重庆市规划和自然资源信息中心 | Building full-space full-element real estate modeling method |
| CN117576326A (en) * | 2024-01-16 | 2024-02-20 | 深圳大学 | Dynamic interaction visualization method and system for three-dimensional property body |
| CN117576326B (en) * | 2024-01-16 | 2024-05-07 | 深圳大学 | Dynamic interaction visualization method and system for three-dimensional property body |
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