Rendering method and device of three-dimensional space data

Abstract

The invention discloses a rendering method and device of three-dimensional space data. The method includes the steps that the three-dimensional space data are obtained; a first quadtree for updating and rendering two-dimensional satellite images and altitude data is set, and a second quadtree for updating and rendering aerial photo three-dimensional model data is set; node auxiliary information and terrain block offset information corresponding to nodes of the two quadtrees are obtained, the three-dimensional space data are rendered according to the node auxiliary information and the terrain block offset information, the node auxiliary information indicates data types corresponding to the nodes, and the terrain block offset information is used for correcting drawn practical positions of the aerial photo three-dimensional model data corresponding to the terrain blocks. According to the method, updating and drawing are conducted simultaneously through the two quadtrees, the two quadtrees are independent from each other, so the aerial photo three-dimensional model data can be overlapped on the two-dimensional satellite images and the altitude which are subjected to data coordinate encryption deflection to be drawn at the same time; accordingly, in the scene transition and splicing process of a three-dimensional electronic map, manual intervention is eliminated, and uncertain factors of model making and the complexity of data making are reduced on the premise of guaranteeing data display accuracy.

Description

technical field [0001] The invention belongs to the technical field of communications, and in particular relates to a rendering method and device for three-dimensional spatial data. Background technique [0002] With the rapid development of computer graphics, three-dimensional simulation technology and virtual reality technology, the traditional two-dimensional electronic map has been injected with new vitality, and the three-dimensional electronic map carried on the Internet is becoming an important direction of electronic map development. [0003] At present, the general practice of 3D electronic maps is to construct a 3D earth space based on satellite images and elevation data in 2D electronic maps, and then superimpose or replace the 3D model data on this basis. This is especially true for electronic maps, where a scene transition and splicing problem is involved. Due to the consideration of national security, in order to prevent the leakage of basic geographic informa...

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Problems solved by technology

[0004] In the process of research and practice of the prior art, the inventors of the present invention have found that this method increases the uncertainty factors of model making an

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