[Qgis-user] Cannot open DEM

[Marco Pasetti]

Hi Mikhail,

you need to use the GRASS plugin in QGIS;

if I understood right you want to use the following raster data (I read from 
the pointed web site):

Data Statistics (30M DEM)
Size:  ~10mb
Resolution: 30 meter
Available format:  USGS DEM
Available geographic area: 7.5 minute quad, 1 degree block
Projection: UTM coordinate system, NAD 83, meters

so you need to:

1) create a new GRASS location with the correct EPSG ID code; I think it 
should be: 3081
see http://www.epsg-registry.org/ for more details (put "nad83" in the 
"name" search box of the "query by filter" page)

2) import the raster using r.in.gdal (from the r.in.gdal guide I have that 
the "USGS ASCII DEM (.dem)" format is supported)
remember to select the command option: "override projection (use location's 
projection)

Hope this helps,

Marco

----- Original Message ----- 
From: "Mikhail Umorin" <Mikhail.Umorin at twdb.state.tx.us>
To: <qgis-user at lists.osgeo.org>
Sent: Wednesday, July 02, 2008 11:09 PM
Subject: [Qgis-user] Cannot open DEM


> Hello —
>
> I am trying to load a DEM from here:
> http://www.tnris.org/datadownload/quad.jsp?Quad=Sabine%20Pass
>
> ("30m DEM" link :
> ftp://ftp2.tnris.org/Elevation/DEMs/30m/2993/g299317.zip)
>
> It is supposedly from USGS but I get error saying that it is not a
> supported raster source.
>
> What is the problem? Can someone help me?
>
> Mikhail.
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