Hello, I can't find anything on how to create one raster layer out of two or more. I have a number of adjacent DEM files that I'd like to combine into one layer for analysis. I can't even figure out whether the verb is merge, combine, join, or something else entirely!
Can anyone help?
TIA, Michael
On Mon, Feb 27, 2006 at 09:10:58PM -0800, we recorded a bogon-computron collision of the <michael.rensing@shaw.ca> flavor, containing:
Hello, I can't find anything on how to create one raster layer out of
two or more. I have a number of adjacent DEM files that I'd like to
combine into one layer for analysis. I can't even figure out whether the
verb is merge, combine, join, or something else entirely!Can anyone help?
"patch"
That is, you use "r.patch" to do this. Set your region to one that is
large enough to contain all the adjacent DEMs and use r.patch to create
one stitched raster.
--
Tom Russo KM5VY SAR502 DM64ux http://www.swcp.com/~russo/
Tijeras, NM QRPL#1592 K2#398 SOC#236 AHTB#1
"And, isn't sanity really just a one-trick pony anyway? I mean all you get is
one trick, rational thinking, but when you're good and crazy, oooh, oooh,
oooh, the sky is the limit!" --- The Tick
Micheal,
If you have gdal installed, your can use the gdal_merge.py utility to
accomplish this (http://gdal.maptools.org/gdal_merge.html).
matt
On 2/27/06, Michael Rensing <michael.rensing@shaw.ca> wrote:
Hello, I can't find anything on how to create one raster layer out of
two or more. I have a number of adjacent DEM files that I'd like to
combine into one layer for analysis. I can't even figure out whether the
verb is merge, combine, join, or something else entirely!Can anyone help?
TIA, Michael
--
Matt Perry
perrygeo@gmail.com
http://www.perrygeo.net
> Hello, I can't find anything on how to create one raster layer out
> of two or more. I have a number of adjacent DEM files that I'd like
> to combine into one layer for analysis. I can't even figure out
> whether the verb is merge, combine, join, or something else
> entirely!
..
"patch"
That is, you use "r.patch" to do this. Set your region to one that is
large enough to contain all the adjacent DEMs and use r.patch to
create one stitched raster.
Hint: To extend the region to cover both maps,
g.region rast=map1,map2
This works for more than two maps as well...
Hamish