Terrain multi-scale TIN (Triangulated Irregular Network) online visualization method oriented to virtual earth
A multi-scale and terrain technology, applied in 3D image processing, instrumentation, calculation, etc., can solve problems such as large distortion, irregular vector data of Grid terrain, seamless integration of geological spatial data, easy loss of important geomorphic feature information, etc.
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[0029] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.
[0030] The technical solution adopted in the present invention is a virtual earth-oriented terrain multi-scale TIN automatic construction and online visualization method. Firstly, a robust space-adaptive terrain feature extraction algorithm is used to extract high-quality terrain from various input terrain data. , and then construct a strict global terrain multi-scale TIN scale parameter model, and constrain high-quality terrain features, through a greedy plug-in TIN construction algorithm to generate high-precision TIN terrain pyramids that take features into...
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