Method and system for generating 3D scene through two-dimensional GIS vector data

Abstract

The invention provides a method and system for generating a 3D scene through two-dimensional GIS vector data. The method specifically comprises the following steps: enabling a client to upload the two-dimensional GIS vector data of a building surface to a server; enabling the server to receive the data and performs format standardization operation on the data; performing topological processing on the standardized building surface data, and converting complex polygons in the building surface into simple polygons; reading a vertex array of the simple polygon, and constructing the building surface into a three-dimensional geometry; if the attribute value of the map type exists in the building surface data, acquiring a corresponding map to execute a tiling operation, otherwise, reading a default map to execute the tiling operation; and forming a grid object by combining the three-dimensional geometry and the material after the paving operation, and adding the grid object into the 3D scene. The two-dimensional GIS vector data of the building surfaces are obtained, and the two-dimensional GIS vector data are automatically pulled up and mapped according to the height information of the data of each building surface and then added into the three-dimensional scene, so that the problem of low efficiency caused by manual contrast of CAD drawing data or manual modeling is solved.

Description

technical field [0001] The invention relates to three-dimensional modeling technology, in particular to a method and system for generating 3D scenes from two-dimensional GIS vector data. Background technique [0002] With the development of technology, the traditional two-dimensional GIS map display method can no longer meet the needs of users for visual experience. The 3D GIS scene allows people to browse map data with a 720-degree view, which greatly improves the user experience. However, at present, most of the 3D scene modeling relies on manual modeling, and modeling is carried out through modeling software such as 3DSMax. The production cost of 3D data is relatively high, and the update and maintenance also need to be carried out by professional modeling personnel, which is inefficient and inconvenient. Fast visual presentation of data. Contents of the invention [0003] In view of the defects in the prior art, the purpose of the present invention is to provide a me...

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Problems solved by technology

[0003] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method and system for generating 3D scenes from two-dimensional GIS vector data, which solves the problem that most of the current three-dimensional scene modeling relies on manual modeling methods, and modeling through 3DSMax, etc. Software modeling, 3D data production costs are high, update and maintenance also need to be carried out by professional modeling personnel, the efficiency is low and it is not convenient for the fast and intuitive presentation of data

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