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Robert, Thanks for the information. I am also not sure whether rasterizing a rectangular grid is good or not. I tried 'gIntersection' but got an error. Anyway, here are the data sets. As you see the climate division file name...

Hi, I read ESRI shapefile and related files using readOGR, and was able to plot successfully but am unable to customize the plot. The data is attached and corresponds to US climate divisions. The below mentioned second command supposed to...

Edzer, It helps. Thanks. For the future audience reference, here is the solution that worked in this situation Thanks to Colin Rundel. I calculated areas and compared with values after gBuffer application - they are same for all polygons except for...

Robert, Thanks for all the detailed information. I am able to work around it with the help of your email and Roger Bivand's reply from archives. For others benefit, I am putting the final version code here. Thanks, Satish...

Hi, I need to calculate the fraction of a polygon that is intersected by another polygon. details of the problem: I have data in two shape files; the first file corresponds to a rectangular grid with uniform intervals whereas the...

Hi, I am trying to calculate fraction of a polygon that is intersected by another polygon. I have data in two shape files; the first file corresponds to a rectangular grid with uniform intervals whereas the second file corresponds to...

Hi, I need to calculate the fraction of a polygon that is intersected by another polygon. details of the problem: I have data in two shape files; the first file corresponds to a rectangular grid with uniform intervals whereas the...

Robert, Thanks for all the detailed information, it was very helpful and am able to find solutions. I update the thread with my final version of code. Thanks, Satish On Thu, Dec 22, 2011 at 9:44 PM, Robert Hijmans...