Dear all,

I have two SpatialPolygonsDataFrame and I am conducting some spatial
operations such as gIntersection, gSymdifference, gUnion in rgeos. However,
the outputs are SpatialPolygons, and thus, I lose the attributes (@data) of
the original polygons.

I need to keep the original attributes associated with the resulted
attributes, and I was wondering if this is somehow possible, and how. I
tried byid T and F without success.

Thanks in advance.

Alex

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