Three-dimensional space information processing method and device and storage medium thereof

Abstract

The invention discloses a three-dimensional space information processing method and device and a storage medium thereof. The method comprises the following steps of: determining that the concave-convex value of a target area is larger than or equal to a preset threshold value, and generating a TIN grid model from the target area; and determining that the concave-convex value of the target area issmaller than a preset threshold, and generating a GRID grid model for the target area, wherein the target area comprises an area for generating a grid model in the DEM, and the concave-convex value isused for calculating the terrain concave-convex degree. According to the method, the GRID and TIN fusion grid model is generated by judging a plurality of target areas in the DEM, and the GRID grid model is generated for the target areas with simple terrains in the DEM, so that the grid precision can be properly increased to save the storage space and reduce rendering hardware resources; the TINgrid model is generated for the target area with a large terrain change amplitude in the DEM, so that the real terrain and landform can be expressed more finely, and the balance degree between rendering precision and storage complexity can be improved.

Description

technical field [0001] The invention relates to the field of data processing, in particular to a three-dimensional space information processing method, equipment and storage medium thereof. Background technique [0002] At present, terrain expression and various geological analysis are usually carried out on the basis of digital elevation model (Digital Elevation Model, DEM). DEM has many advantages as a digital expression method of terrain. In a broad sense, it consists of Grid structure, TIN structure, contour structure, etc. Organized in three ways. With the development of earth observation technology, it is more convenient and faster to obtain various scale topographic and surface object data represented by Grid data and TIN data, making it possible to construct refined terrain scenes on a large scale. Traditional total stations and theodolites can also obtain small-scale, high-precision terrain data as a supplement. Due to the complexity of the earth system, any means...

AI Technical Summary

Problems solved by technology

In the real world, it is difficult for a single data model to efficiently express various terrain scenarios. For example, Grid is suitable for expressing areas with little terrain change. However, if you want to express finely the boundaries of rivers and lakes, road belt terrain, etc., Grid can pass It can be obtained by increasing the resolution, but it will bring greater data redundancy

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