On Fri, 15 Jan 2010, rick reeves wrote:
Hello List:
I have been reviewing techniques within R for performing the GIS-like
operation 'polygon algebra' (computing the union and intersection of
polygons within two SpatialPolygonDataFrame objects). The goal is to
combine two polygon data frames,
Hello List:
I have been reviewing techniques within R for performing the GIS-like
operation
'polygon algebra' (computing the union and intersection of polygons within
two SpatialPolygonDataFrame objects). The goal is to combine two polygon
data frames, to produce a new polygon data frames that
