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spatialdatapolygons
2004 Apr 02
1
Winding Number
I have shapefiles for the state climatic divisions for the United States
and read.shape brings them in wonderfully. Now I wish to run through a
list of several thousand observation sites to find out in which division
each is located. I figure that I can compute the winding number for each
site and be done. However a search doesn't find any references and I
can't find a winding number