A Multi-level Vector Road Network Matching Method Based on Delaunay Triangulation
A technology of triangulation and matching methods, applied in image analysis, image enhancement, instruments, etc., to achieve the effect of good matching relationship
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[0062] In order to illustrate the idea of the present invention more clearly, below in conjunction with appendix image 3 A small road network data is used as an example for further illustration.
[0063] image 3 -a shows a simple road data with 3 roads.
[0064] Utilize the method of the present invention to carry out matching road:
[0065] Step 1) Remove the roads where the nodes with a connectivity of 1 are located, and use the Stroke principle to process the road network hierarchically, and set the threshold to obtain the first-level road network.
[0066] figure 2 -a is two pieces of road network data to be matched, figure 2 -b is the result of the first-level road network obtained after step 1.
[0067] Step 2) Obtain all the nodes of the road network, and then obtain their convex hull polygons, and then expand and refine the convex hull, so that the points on the obtained polygons are evenly distributed in the outer layer of the first layer of road network, s...
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