Is the geotiff in degrees?
If you are on unix use gdalinfo to find out the projection of the
geotiff. You will have to import in its native projection and then
reporject into whatever coordinate system that you would like. I am
just drinking my coffee this morning, so I may not be awake yet.
HTH,
Stephen
On Wed 14 Mar 2012 02:27:39 AM CDT, Fridtjof Schiefenhövel wrote:
Hello there!
it seems I can't solve this problem:
->create a location with a mercator projection (i want to have degrees as the
coordinate system)
->import landsat geotiffs
->have degrees as units showing (e.g. when moving the mouse)
this is what I did:
-created a location using the projection/datum from a georeferenced file (the
landsat geotiff).
-created a location selecting mercator projection
here is what "g.region -p" showed:
projection: 99 (Mercator)
zone: 0
datum: wgs84
ellipsoid: wgs84
north: 0
south: -12.5
west: 125
east: 150
nsres: 12.5
ewres: 12.5
rows: 1
cols: 2
cells: 2
-ran v.in.region in the source location
{trying r.proj without it would give me an error saying the imported region is
out of bounds}
-imported the vector map in the target location
-set region to imported vector map
-ran r.proj to import/reproject the landsat geotiff from the source location.
here is what "g.region -p" showed now:
projection: 99 (Mercator)
zone: 0
datum: wgs84
ellipsoid: wgs84
north: -375086.40793588
south: -583681.58556862
west: -122131.46631847
east: 111149.12622161
nsres: 12.49971103
ewres: 12.50029968
rows: 16688
cols: 18662
cells: 311431456
I do not understand, how can these bound values be even accepted when I chose
Mercator projection and degrees coordinate system in the first place?
Thanks!
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--
Stephen Sefick
**************************************************
Auburn University
Biological Sciences
331 Funchess Hall
Auburn, Alabama
36849
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sas0...@auburn.edu
http://www.auburn.edu/~sas0025
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Let's not spend our time and resources thinking about things that are
so little or so large that all they really do for us is puff us up and
make us feel like gods. We are mammals, and have not exhausted the
annoying little problems of being mammals.
-K. Mullis
"A big computer, a complex algorithm and a long time does not equal
science."
-Robert Gentleman
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