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If you need to downscale gridded maps, then consider also using SAGA GIS, which
has a very flexible down/up-scaling functionality:
http://spatial-analyst.net/wiki/index.php?title=Export_maps_to_GE#Rescaling_maps_in_SAGA_GIS
HTH
T. H
Thanks again for the fast reply,
In fact this problem is only a tiny part of the project and I'll need
to run this overlay operation over more than 600 polygons (watersheds)
to get mean values (and standard error) of ~10 environmental variables
(rasters that are not at the same resolution,
On Tue, 5 Jan 2010, laure velez wrote:
Many thanks for the fast replies,
@ Roger : polygons and raster are ok (see attached file).
@ Johannes : I have already try this but the result was not satisfying, using
a SpatialPointsDataFrame do not solve the problem as the points are not inside
Many thanks for the fast replies,
@ Roger : polygons and raster are ok (see attached file).
@ Johannes : I have already try this but the result was not satisfying, using
a SpatialPointsDataFrame do not solve the problem as the points are not inside
the polygon (see attached file).
I gues
