Ye gods - you are a genius. I've got a merged DEM with none of the
overlap - except for the two triangular holes in the DEM because They
worried about political boundaries...but not overlap of the data.
So I ran this through the Toolbox formerly knows as Sextante. It has
r.patch as a tool. Luckily I didn't have to go through all the
convolutions of of building a map set and resolutions and then wondering
if I've forgotten something.
GDAL Merge didn't work.
Saga Merge Raster Layers gave me the same output as GDAL Merge
Now I just have to explain it to my client and I'm good.
Thanks to all of you who chimed in.....
Randy
-----------------
Randal Hale, GISP
North River Geographic Systems, Inc
http://www.northrivergeographic.com
423.653.3611 [email protected]
twitter:rjhale
http://about.me/rjhale
On 05/29/2014 09:42 AM, Mark Seibel wrote:
Hi.
On Thu, May 29, 2014 at 9:25 AM, Randal Hale
<[email protected]
<mailto:[email protected]>> wrote:
I have two Digital Elevation Models - Imagine a square cut into
two equal triangles.
No matter how I do it - One DEM overwrites the other one so I'm
only ever getting half of the elevation model I want when I merge
them.
...
Thoughts or ideas?
Randy
Is there a GRASS function in QGIS for r.patch? It uses both datasets,
and uses one to fill the NULL values of another. Would probably have
to make sure the computational region is set to accommodate the extent
of merging both DEMs (maybe not necessary if r.patch doesnt regard
region settings).
Mark
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