CN112100297A - Three-dimensional visualization method for data management in urban updating - Google Patents
Three-dimensional visualization method for data management in urban updating Download PDFInfo
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- CN112100297A CN112100297A CN202010725582.5A CN202010725582A CN112100297A CN 112100297 A CN112100297 A CN 112100297A CN 202010725582 A CN202010725582 A CN 202010725582A CN 112100297 A CN112100297 A CN 112100297A
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Abstract
The invention relates to a three-dimensional visualization method for data management in urban updating, which comprises the following steps: unmanned aerial vehicle oblique photography, generating a building into a single building oblique model, and forming an independent object with attachable attributes; digitalizing the existing address entity, converting the digital address entity into standard address data and GIS geographic coordinate data to form a geographic coding database; superposing and attaching the building inclination model and the spatial geometric data, and acquiring associated data through the spatial geometric data; and carrying out multistage division on the map according to the scale standard, and establishing a grid index so as to facilitate query. The invention adopts the oblique photogrammetry technology to establish a three-dimensional model, realizes the locking of various information of the building, can simultaneously acquire image data in real time, establishes a three-dimensional image database, and realizes the measurement function, the quick query and positioning and the data contrastive analysis in different periods of any building in a land using range. Meanwhile, three-dimensional visualization can be applied to carry out batch management on data on the map.
Description
Technical Field
The invention belongs to the field of surveying and mapping, and particularly relates to a visualization method of a map building model.
Technical Field
With the gradual maturity of unmanned aerial vehicle photography technology, a brand-new visual angle is achieved and all-around shooting can be carried out, and a live-action three-dimensional map is really developed. The intuitiveness, the information quantity and the accuracy of the method are far from the comparison of the traditional two-dimensional electronic map. In the traditional mapping field, data such as urban and rural planning, land planning, controllability detailed planning, real estate investigation, real measurement of real estate buildings and the like are generally displayed by two-dimensional drawings such as CAD (computer-aided design), the two-dimensional drawings are independently stored, a unified platform is not needed for summary display, the displayed visualization method is single, the coordinate standards are different, data cannot be overlapped and viewed, the data management mode is single, and comprehensive analysis capability is difficult to form.
Disclosure of Invention
The invention aims to provide a method for combining multiple kinds of data of a three-dimensional visual map for updating a city map.
The invention relates to a three-dimensional visualization method for data management in city updating, which comprises the following steps:
A. unmanned aerial vehicle oblique photography, generating a building into a single building oblique model, and forming an independent object with attachable attributes;
B. digitalizing the existing address entity, converting the digital address entity into standard address data and GIS geographic coordinate data to form a geographic coding database;
C. the building inclination model is superposed and attached to the spatial geometric data, and associated attribute data and multimedia data are obtained through the spatial geometric data;
D. the map is divided into multiple levels according to the scale standard, a grid index is established after the map is subjected to graph rendering, a map engine inquires according to a request, and the map in the cache is sent and displayed according to the current display scale and range.
The three-dimensional visualization method for data management in urban updating is further described, a three-layer client/server information framework is established, a sign-and-tear information graph is established, and an analysis scene is provided by the established monomer model.
As a further description of the above three-dimensional visualization method for data management in urban updating, the building tilt model includes spatial geometry ID, building area initial survey information, parcel land information, lot land information, home-entry survey information, and planning information.
As a further description of the above three-dimensional visualization method for data management in urban update, the spatial geometric data, the attribute data, and the multimedia data are all associated together.
As a further description of the above three-dimensional visualization method for data management in urban update, the building tilt model is a cut-and-singleton model: and taking the boundary line of the vector surface as a cutting line, generating a point subset boundary by the point cloud to obtain a single model boundary, and performing triangular segmentation on the point subset to form a single model.
As a further description of the above three-dimensional visualization method for data management in city update, the building tilt model is ID singleization: the vector data set stores ID values, and in combination with two-dimensional vector plane data, the ID values of the corresponding vector planes are assigned to each vertex in the map division as attributes and are associated with other types of data to form a single model.
As a further description of the above three-dimensional visualization method for data management in urban update, the building tilt model is dynamically integrated: the vector surface and the oblique photography model are loaded to the same scene, and the vector surface is attached to the surface of the oblique model object.
The invention has the beneficial effects that: and a real-scene three-dimensional model is established by adopting the latest aerial oblique photogrammetry technology, so that the key projects of the reconstruction area, the current land utilization situation of the peripheral area, the building height, the building area, the structure and other attached crops are locked. Meanwhile, a live-action three-dimensional image database can be established on the basis of image data acquired in real time, and the measuring function, the quick query and positioning and the data comparison and analysis at different periods of time of any building in the land range are realized through the established three-dimensional visual data management system. Meanwhile, three-dimensional visualization can be applied to carry out batch management on city planning, land planning, investigation of real estate title, calculation of floor area of houses and daily land.
Drawings
FIG. 1 is a schematic diagram illustrating angle comparison of a captured image according to the present invention;
FIG. 2 is a process of integrally forming a building tilt model according to the present invention;
FIG. 3 is a boundary handling process in a singulation model process.
Detailed Description
Referring to fig. 1-3, the present invention provides a three-dimensional visualization method for data management in city update, which comprises the following steps:
A. unmanned aerial vehicle oblique photography, generating a building into a single building oblique model, and forming an independent object with attachable attributes; in the process of building a surface model of a building, it can be seen from fig. 1 that oblique images have significant advantages over vertical images because they provide a better viewing angle to the sides of the building, a feature that just meets the requirements of the generation of the surface texture of the building. Vertical images taken in the same area can be used for generating a three-dimensional city model or improving the generated three-dimensional city model;
B. digitalizing the existing address entity, and sequentially converting the existing address entity into standard address data and GIS geographic coordinate data to form a geographic coding database; the address entities comprise place names, road names, gate building addresses and the like, and address query and address matching can be provided by formulating an address search matching algorithm;
C. the building inclination model is superposed and attached to the spatial geometric data, and associated attribute data and multimedia data are obtained through the spatial geometric data;
D. the map is divided in multiple stages according to the scale standard, a grid index is established after the map is subjected to graph rendering, the map is cut and stored in a plurality of small graphs, when the map is accessed through the Internet, a map engine inquires according to a request, and the map in the cache is sent and displayed according to the current display scale and range.
The three-dimensional visualization method for data management in urban updating is further described, a three-layer client/server information framework is established, a sign-and-tear information graph is established, and an analysis scene is provided by the established monomer model.
As a further description of the above three-dimensional visualization method for data management in urban updating, the building tilt model includes spatial geometry ID, building area initial survey information, parcel land information, lot land information, home-entry survey information, and planning information.
As a further description of the above three-dimensional visualization method for data management in urban update, the spatial geometric data, the attribute data, and the multimedia data are all associated together.
As a further description of the above three-dimensional visualization method for data management in city update, the building tilt model has a plurality of singlelization modes:
the building inclined model is cut and individualized: and taking the boundary line of the vector surface as a cutting line, generating a point subset boundary by the point cloud to obtain a single model boundary, and performing triangular segmentation on the point subset to form a single model.
The building inclination model is ID simplex: the vector data set stores ID values, and in combination with two-dimensional vector plane data, the ID values of the corresponding vector planes are assigned to each vertex in the map division as attributes and are associated with other types of data to form a single model.
The building inclination model is dynamically integrated: the vector surface and the oblique photography model are loaded to the same scene, and the vector surface is attached to the surface of the oblique model object.
In the building inclination model modeling process, point clouds are generated by computer graphic calculation and pos information space-three processing, grids are formed by the point clouds, and a three-dimensional model endowed with textures is generated by combining the grids and photos.
The above description is not intended to limit the technical scope of the present invention, and any modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (7)
1. The three-dimensional visualization method for data management in city updating is characterized by comprising the following steps:
A. unmanned aerial vehicle oblique photography, generating a building into a single building oblique model, and forming an independent object with attachable attributes;
B. digitalizing the existing address entity, converting the digital address entity into standard address data and GIS geographic coordinate data to form a geographic coding database;
C. the building inclination model is superposed and attached to the spatial geometric data, and associated attribute data and multimedia data are obtained through the spatial geometric data;
D. the map is divided into multiple levels according to the scale standard, a grid index is established after the map is subjected to graph rendering, a map engine inquires according to a request, and the map in the cache is sent and displayed according to the current display scale and range.
2. The three-dimensional visualization method for data management in city update according to claim 1, wherein: and establishing a three-layer client/server information framework, establishing a sign-and-tear information graph, and providing an analysis scene by the established single-body model.
3. The three-dimensional visualization method for data management in city update according to claim 1, wherein: the building inclination model comprises a space geometry ID, building area initial measurement information, parcel land information, lot land information, home-entry measurement information and planning information.
4. The three-dimensional visualization method for data management in city update according to claim 1, wherein: the spatial geometric data, the attribute data and the multimedia data are all uniformly associated.
5. The method of claim 1, wherein the building tilt model is a cut-to-singleton model: and taking the boundary line of the vector surface as a cutting line, generating a point subset boundary by the point cloud to obtain a single model boundary, and performing triangular segmentation on the point subset to form a single model.
6. The method of claim 1, wherein the building tilt model is ID singleization: the vector data set stores ID values, and in combination with two-dimensional vector plane data, the ID values of the corresponding vector planes are assigned to each vertex in the map division as attributes and are associated with other types of data to form a single model.
7. The method of claim 1, wherein the building tilt model is dynamically simplex: the vector surface and the oblique photography model are loaded to the same scene, and the vector surface is attached to the surface of the oblique model object.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112800079A (en) * | 2021-04-12 | 2021-05-14 | 北京三维天地科技股份有限公司 | Method and system for simplifying standard use |
| CN114049462A (en) * | 2021-11-09 | 2022-02-15 | 中国人民解放军61646部队 | Three-dimensional model monomer method and device |
| CN115082635A (en) * | 2022-08-19 | 2022-09-20 | 北京山维科技股份有限公司 | Method and system for realizing multiple states of geographic entity based on cutting inclination model |
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