Dynamic visualization method of island reefs based on tidal process
A technology of tides and islands, which is applied in the field of dynamic visualization of islands and reefs based on tide levels, and can solve problems such as insufficient display of dynamic tidal processes
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[0024] Such as figure 1 Shown, the specific implementation mode of the inventive method is as follows:
[0025] (1) Construct DEM using contour lines, elevation control points, contour lines, and water depth points;
[0026] a) Negative value processing is performed on the water depth data (isobath, water depth point), that is, the water depth value is changed from positive to negative to generate an absolute altitude value;
[0027] b) Use the elevation data of the land and seabed, and use the popular contour interpolation algorithm to generate DEM;
[0028] (2) According to the area selected by the user, use the terrain extraction module to search and select the DEM of the corresponding area in the basic geographic information database. Here, Nanyao Island in the Nansha Islands is taken as an example. Nanyao Island is located at 114°25'25" E, 10°40'04"N, eg figure 2 The three-dimensional display of DEM of Nanyao Island is shown;
[0029] (3) According to the area and ti...
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