Simulation method of webgis spatio-temporal process based on time series features and particle system
A particle system and process simulation technology, applied in the field of geographic information visualization, can solve the problems of natural phenomenon expression, lack of natural phenomenon display and analysis support, no fixed shape and appearance, etc., to reduce development costs and expand the ability to dynamically display space-time information Effect
Active Publication Date: 2020-04-03
中国科学院电子学研究所苏州研究院
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[0006] The technical problem to be solved in the present invention is to aim at the deficiencies of the above-mentioned prior art, and provide a kind of Web GIS spatio-temporal process simulation method based on time-series features and particle system, this Web GIS spatio-temporal process simulation method based on time-series features and particle system can solve The existing WebGIS system is mainly visualized through regular graphics, and it is impossible to express natural phenomena such as clouds, fog, snow, dust, and luminous trajectories that have no fixed shape and appearance and change with time. The display and analysis of supporting issues
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[0054] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific preferred embodiments.
[0055] Such as figure 1 As shown, a Web GIS spatio-temporal process simulation method based on time series features and particle systems includes the following steps.
[0056] Step 1, WebGIS scene creation: the WebGIS scene is created using WebGL, the network drawing standard, and the created WebGIS scene includes 3D digital earth, camera 1 and renderer 1, etc. Among them, camera one and renderer one are responsible for observing and rendering the three-dimensional digital earth.
[0057] Step 2, particle system scene creation: Create a particle system scene. The scene creation method refers to the particle system initialization in ThreeJS. The created particle system scene includes particle emitter, camera 2 and renderer 2, etc. Among them, camera 2 and renderer 2 are responsible for observing and rendering the particle s...
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The invention discloses a time sequence feature and particle system-based WebGIS spatio-temporal process simulation method. The method comprises the steps of firstly creating a WebGIS scene and a particle system scene, and performing scene fusion; secondly analyzing features of a spatio-temporal process based on a time sequence, and performing abstract expression on generation, development and destruction processes of a spatio-temporal phenomenon; and finally updating particle states according to a motion rule, and executing rendering to finish spatio-temporal process visualization. According to the method, the deficiencies of a WebGIS in expressing natural phenomena such as rain, wind, clouds and the like are made up for, the spatio-temporal information dynamic display capacity of the WebGIS is expanded, and inversion and prediction are supported, so that support is provided for exploring a spatio-temporal change law of the phenomena.
Description
technical field [0001] The invention relates to the field of geographic information visualization, in particular to a WebGIS spatio-temporal process simulation method based on time series features and particle systems. Background technique [0002] The development of WebGIS (Web Geospatial Information System) has tended to be perfect. The traditional two-dimensional WebGIS has excellent spatial analysis and two-dimensional data expression capabilities, but there are problems such as three-dimensional geometric position information, spatial topological information and partial semantic missing. [0003] With the rapid popularization of the Internet and the rapid development and application of HTML5 technology, the 3D WebGIS formed by combining the new generation of Web3D drawing standards, WebGL technology and 2D WebGIS has injected fresh blood into the development of GIS. Compared with 2D GIS, 3D WebGIS can analyze and display objects in the objective world from a spatial per...
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IPC IPC(8): G06T17/05G06T15/00
CPCG06T15/00G06T17/05Y02A90/10
Inventor 付琨胡岩峰顾爽徐汇军王洋钱晶付啟明张尧
Owner 中国科学院电子学研究所苏州研究院