Generation method of three-dimensional map vector tile data, storage medium and terminal

Abstract

The invention provides a three-dimensional map vector tile data generation method, a storage medium and a terminal. The method includes: using a unit cube to divide a three-dimensional space of a three-dimensional geometric data model; firstly, constructing a visual domain cube based on a unit cube where a viewpoint position is located; secondly, performing intersection relation judgment on all three-dimensional models in the three-dimensional geometric data model and the visual domain cube to obtain a potential three-dimensional model set in the visual domain cube; taking the center of the unit cube where the viewpoint position is located as a viewpoint to perform occlusion screening on the potential three-dimensional model set to obtain a visible three-dimensional model set, and finallygenerating vector tile data of the visible three-dimensional model set. According to the method for generating the three-dimensional map vector tile data, screening is carried out before the vector tile data is generated, only the visible three-dimensional model set in the visible range cube is loaded each time, and the vector tile data of the visible three-dimensional model set is generated, so that the data volume is small, and the generation speed is high.

Description

technical field [0001] The present invention relates to the field of map technology, in particular to a method for generating three-dimensional map vector tile data, a storage medium and a terminal. Background technique [0002] With the continuous advancement of 3D surveying and mapping technology, the ultra-massive 3D geospatial data with high precision, high frequency and large coverage is growing explosively. Different types of 3D geospatial data (oblique photographic models, point clouds, fine models, etc.) have different precisions, which represent different levels of detail in expressing the real world, and are applied to urban 3D scenes of different spatial scales. For example, the accuracy of oblique photographic models is usually at the centimeter level, which has the characteristics of high realism, and is widely used in the visualization of large-scale urban 3D scenes; the accuracy of 3D laser scanning point cloud (LIDAR) can reach millimeter level, which can be ...

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Problems solved by technology

[0006] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a method for generating 3D map vector tile data, a storage medium and a terminal, aiming at solving the problem that the existing vector tile technology is not applicable to 3D scenes, and the data generation slow technical issues

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