Data rarefying and smooth processing method based on vector map
A vector map data, smoothing technology, applied in image data processing, image enhancement, image coding and other directions, can solve problems such as loss, and achieve the effect of improving the display effect
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[0021] A method for thinning and smoothing processing based on vector map data of the present invention mainly includes the following two steps:
[0022] Step 1. Reduce the amount of data by thinning out the curve feature points;
[0023] Step 2. Solve the problem of protruding edges and corners by smoothing the closed curve feature points.
[0024] The specific steps of the feature points of the thinning curve are as follows:
[0025] Step 11, load the geographical coordinates (longitude and latitude) of the curve feature points in the vector map data into the array, and set the thinning state identification iDel for each curve feature point, except the thinning state identification iDel= In addition to 1, the thinning state flag iDel of other feature points is initialized to 0 before thinning and smoothing. Among them, thinning state flag iDel=0 means thinning is allowed, thinning state flag iDel=1 means reserved point, The thinning state flag iDel=-1 can be deleted. If th...
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