Automatic Construction Method of 3D Spatial Model of Rail Transit Station Based on GIS Data

Abstract

The present invention proposes a method for automatically constructing a three-dimensional model of rail transit station space based on GIS data, including the following steps: designing two-dimensional topology rules for three-dimensional model generation; standardizing the two-dimensional data of subway stations; Under the rule, a 3D model based on prefab is constructed according to the standardized 2D data; under the 2D topology rule, a 3D model based on geometry is constructed according to the standardized 2D data; the 3D model based on prefab and Based on the 3D model of the geometric shape, the 3D model of the subway station interior is obtained. The present invention can truly restore the spatial composition, position direction, intersection and correlation of indoor elements of the subway station, effectively solve the problem of rapid construction and dynamic update of the three-dimensional refined model in actual production, and provide a fine and efficient three-dimensional model production and maintenance. Strong technical support.

Description

technical field [0001] The invention relates to three-dimensional modeling technology and texture mapping technology of indoor space, belongs to the field of parametric three-dimensional modeling, and specifically relates to a method for automatically constructing a three-dimensional model of rail transit station space based on GIS (Geographic Information System, geographic information system) data. Background technique [0002] With the continuous advancement of urbanization and the rapid development of geographic information technology, more and more requirements are put forward for urban space management, and 3D modeling technology, as an important means of reproducing 3D urban space scenes, is also constantly enriched and improved. At present, there are many methods for urban modeling, such as based on photogrammetry, based on remote sensing images, based on visual image sequences and based on 3D laser scanning 3D modeling methods, although these modeling methods can well...

AI Technical Summary

Problems solved by technology

At present, there are many methods for urban modeling, such as based on photogrammetry, based on remote sensing images, based on visual image sequences and based on 3D laser scanning 3D modeling methods, although these modeling methods can well reflect the external characteristics of urban buildings , but when it comes to the interior of the building, especially the modeling of the fine and complex parts of the underground space, it seems powerless

[0003] As an important transportation hub in the city, the subway station has a complex internal space structure, staggered layers, subordination relationship between multiple layers, and crossing relationship between layers, which brings great challenges to the 3D modeling work

Although traditional measurement data and 3D modeling software can also be used to construct 3D models of subway stations, indoor facilities, equipment, equipment and other components of subway stations will change with security activities, and subway stations will continue to change with the gradual construction and development Due to the indoor space structure, the manual modeling method requires not only the quality inspection of the measurement data, but also the layered construction of the 3D model, which is cumbersome and inefficient

In addition, the maintenance, quality inspection and update of 2D and 3D data in the station are heavy and continuous, which poses a challenge to the timeliness of indoor 3D map update

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