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Method for automatically creating CityGML model based on two-dimensional vector

A two-dimensional vector and automatic creation technology, applied in the field of three-dimensional modeling, can solve problems such as unanalyzable applications and heavy manual workload of three-dimensional modeling, and achieve the effect of saving modeling costs and improving efficiency

Pending Publication Date: 2022-02-11
SHAANXI TIRAIN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the manual workload of 3D modeling is huge, and the models are expressed by adding texture information to the geometric structure. The geometric structure expresses a whole. In subsequent applications, the roof, floor or wall cannot be analyzed and applied separately. The attribute information of buildings It is also mounted as an external link

Method used

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] The invention relates to a method for automatically creating a CityGML model based on a two-dimensional vector. According to the definition of the building LOD2 model in the CityGML2.0 standard, it expresses the floor of the building, the side wall of the building, and the roof of the building. the whole building. The steps involved are:

[0021] Step 1: Define the modules included in the building CityGML format model such as roof, side wall, floor, etc.

[0022] The building can be split into different modules so that different structures can analyze the building. Define the surface whose normal line is vertical to the ground in the building surfac...

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Abstract

The invention discloses a method for automatically creating a CityGML model based on a two-dimensional vector. The method comprises the following steps: dividing building surface elements into a floor, sidewalls, and a roof; then obtaining two-dimensional vector data of the building, and obtaining top height and bottom height data of the building; combining objects of the same building ID through attributes of a building ID, using the Boolean operation to process a topological relationship among objects of the building, and finally generating a complete building model. According to a model generated by the invention, information such as roofs, sidewalls, and floors are distinguished, and independent application analysis can be carried out on the roofs, the sidewalls, and the floors, so that the application effect of the three-dimensional model is better achieved.

Description

technical field [0001] The invention relates to the technical field of three-dimensional modeling, in particular to a method for automatically creating a CityGML model based on two-dimensional vectors. Background technique [0002] City Geographic Markup Language (CityGML) is a concept for the modeling and exchange of 3D city and landscape models, and a general information model for representing 3D city objects. It defines the classes and relationships of the most relevant terrain objects in city and region models based on geometric, topological, semantic and appearance properties. Includes generalized hierarchies between subject classes, aggregations, relationships between objects, and spatial attributes. Compared with other 3D vector formats, CityGML is based on a rich, common information model as well as geometric and graphical content, allowing the use of virtual 3D city models for complex analysis tasks in different application areas, such as simulation, urban data min...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/10G06F30/20G06F30/13G06F119/02
CPCG06T17/10G06F30/13G06F30/20G06F2119/02
Inventor 陈利姚维琛王亚平王晶王星宇
Owner SHAANXI TIRAIN TECH CO LTD