[R-sig-Geo] Cropping a set of points with a polygon

[Anthony Fischbach]

You may use something like this.
X.prj<-spTransform(X, proj4string(pointsDF))     ## project polygons to the
points coordinate system
pointsDF.over<-over(x=pointsDF, y=X.prj)	## perform GIS over lay opperation

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Tony Fischbach, Wildlife Biologist
Walrus Research Program
Alaska Science Center
U.S. Geological Survey
4210 University Drive
Anchorage, AK 99508-4650

AFischbach at usgs.gov
http://alaska.usgs.gov/science/biology/walrus
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