Thanks, Tom..........
I guessed you probably had.... but I didn't guess gdal!
So I (apparently) successfully installed the gdal utilities. For an
example in the documentation, they show:
gdal_contour -a elev dem.tif contour.shp -i 10.0
Is that a good set of options? Don't you need to put in a base
elevation or something? Are the contour lines labels with elevation? I
don't understand the -3d, -inodata, or -snodata.... they are not needed
for the typical USGS dem?
Any other clues as my DEM downloads?
Many thanx.............. jt
Tom Russo wrote:
On Sun, Oct 26, 2008 at 09:30:01AM -0500, we recorded a bogon-computron collision of
the <[EMAIL PROTECTED]> flavor, containing:
Converting Digital Elevation Models To Shapefile/DXF Contours
Published at December 20, 2007 in DEM, GIS and Garmin.
http://freegeographytools.com/2007/converting-digital-elevation-models-to-shapefiledxf-contours
<https://webmail2.centurytel.net/hwebmail/services/go.php?url=http%3A%2F%2Ffreegeographytools.com%2F2007%2Fconverting-digital-elevation-models-to-shapefiledxf-contours>
I had a note from Curt in July, 2007, that Xastir doesn't support DEM file
format. But if these were converted to shapefiles, should I be able to use
them?
Yes.
There are plenty of tools to do this, including "gdal_contour" (a part of the
GDAL suite).
--
Jim Tolbert
[EMAIL PROTECTED]
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