[GRASSLIST:7035] Re: region related issues with r.proj
Hamish
hamish_nospam at yahoo.com
Mon Jun 6 19:34:19 EDT 2005
> I have just stumbled upon a bit of an issue while using r.proj in
> grass6.0. The situation is as follows: I have imported a 10m dem of
> a comparatively large scale (zoomed out area) of a 10m dem, and what I
> would like to do is import this dem into a location of a smaller
> region using r.proj (I have done this successfully in a different
> scenario), but it complains that "the input map is outside current
> region." I figure that the problem is just as grass reports it,
> but I am not sure how to fix it/make it work. The projection
> converion is from nad83 to nad27. (On a separate note, is this inverse
> chronical conversion an error--is it better to run map projects in the
> most recent projection systems?)
Hint for getting the region correct:
Use v.in.region to rectify a box showing where your data will end up,
and then rectify the raster to this fine tuned region.
in the source location: (nad83)
d.zoom
v.in.region out=region_box
in the target location: (nad27)
v.proj in=region_box
g.region vect=region_box
r.proj in=old_map
good luck,
Hamish
More information about the grass-user
mailing list