A DRG file is in MrSID format with these files available: drg_s_or071.aux,
drg_s_or071.sid, drg_s_or071.sid.xml, drg_s_or071.sdw, and
drg_s_or071.sid.html.
The accompanying .txt file tells me the projection is UTM Zone 10. To
create a new location for this map I need to specify the file holding the
projection information and select the correct format in the GUI's second
step.
Which file should I use to inform the grass GIS of the MrSID projection?
Rich
On Tue, 20 Sep 2016, Rich Shepard wrote:
Which file should I use to inform the grass GIS of the MrSID projection?
Never mind. I looked up the EPSG code and entered that directly.
Rich
On Tue, 20 Sep 2016, Rich Shepard wrote:
Never mind. I looked up the EPSG code and entered that directly.
However, I'm not finding the correct file at which to point grass.
r.in.gdal fails because it cannot find any bands. My web searches on how to
import a MrSID file all point me to the r.in.gdal manual page and no example
there seems to apply to the files I have.
Suggestions?
Rich
From what I read, you should point to the .sid file. But check if your gdal is compiled with MrSID support. A gdalinfo on the file should inform you if your gdal install can handle such files
On Tue, Sep 20, 2016 at 4:07 PM, Rich Shepard <rshepard@appl-ecosys.com> wrote:
On Tue, 20 Sep 2016, Rich Shepard wrote:
Never mind. I looked up the EPSG code and entered that directly.
However, I’m not finding the correct file at which to point grass.
r.in.gdal fails because it cannot find any bands. My web searches on how to
import a MrSID file all point me to the r.in.gdal manual page and no example
there seems to apply to the files I have.Suggestions?
Rich
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On Tue, 20 Sep 2016, Daniel Victoria wrote:
From what I read, you should point to the .sid file. But check if your
gdal is compiled with MrSID support. A gdalinfo on the file should inform
you if your gdal install can handle such files
Daniel,
Now that is really interesting. Running 'gdalinfo --formats' produces a
list that does not include MrSid, which explains why grass did not want to
import the .sid file. Time to recompile gdal.
Thanks for the information,
Rich
On Tue, 20 Sep 2016, Rich Shepard wrote:
Now that is really interesting. Running 'gdalinfo --formats' produces a
list that does not include MrSid, which explains why grass did not want to
import the .sid file. Time to recompile gdal.
I had an old version of gdal installed and just upgraded that to version
2.1.1; still no MrSid support. In the gdal wiki I found this information:
"MrSID driver needs LizardTech decoding software development kit (DSDK). It
is not free software, but you can download it without charge at
https://www.lizardtech.com/developer/ (you will have to register first). To
enable file creation capability you need encoding SDK (ESDK). You should
contact LizardTech to obtain it."
For a single DRG it's not worth the hassle.
Rich