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Thanks Robert, I was able to do it with the following using the 'gpclib" package: p2 <- as(xy, "gpc.poly") p1 <- as(maparea, "gpc.poly") plot(setdiff(p1, p2), poly.args = list(col = 3), add = TRUE) Did exactly what I...
Hello, I have the contour of the shoreline of a lake. I have measured data points away from the lake shore signifying a particular depth. The data is not ordered as a polygon and hence trying to draw it creates...
Thank you very much. That worked, mostly!?! But I see the methodology now. I had been thinking about masks, but I was asking the wrong question I now realize. In my real application, using your approach, I still have some...
I have a result from Akima or Loesss interpolation using irregular data defined inside a polygon. I only want the results inside the polygon. Akima interpolates correctly inside the polygon but leaves a blue residue outside the polygon (a result...
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