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Okay. some details.<br>
I am working in California maps. I had trouble creating a new
project/mapset, but it is working now. I used r.in.gdal to bring in the
Geotiff and Grass sees it as NAD83 Albers Conical. I tried to use the
command gdalinfo and Grass could not file the file. Even though it is
showing in the Map Display.<br>
Whatever.<br>
here is the g.region -p, I have no idea if it is correct. I don't
understand the negative west, east numbers yet.<br>
<br>
projection: 99 (Albers Equal Area)<br>
zone: 0<br>
datum: nad83<br>
ellipsoid: grs80<br>
north: 405480.97282175<br>
south: 391273.11966856<br>
west: -271733.88910031<br>
east: -260832.03532599<br>
nsres: 1.52772615<br>
ewres: 1.52772615<br>
rows: 9300<br>
cols: 7136<br>
cells: 66364800<br>
<br>
My next question is: I need this base Geotiff in UTM WGS84. From what
the other email said, I have to create a new location. Does the area
covered have to be the same? I am still having a hard time with the
project region syntax. <br>
<br>
I also have GPS waypoints(in UTM, WGS84) I want to bring into the
mapset. From what I read points should be treated as vectors? Is there
a way to mass import points into the database?<br>
<br>
I ordered the Neteler book, I hope it has real examples.<br>
<br>
Thanks,<br>
Tom<br>
<br>
Tom Russo wrote:
<blockquote cite="mid:20080721145503.GA94028@bogodyn.org" type="cite">
<pre wrap="">On Sun, Jul 20, 2008 at 08:28:54PM -0700, we recorded a bogon-computron collision of the <a class="moz-txt-link-rfc2396E" href="mailto:mtnbiketrail@zzz.com"><mtnbiketrail@zzz.com></a> flavor, containing:
</pre>
<blockquote type="cite">
<pre wrap="">I'm confused.
I want to set up a new project and use UTM wgs 84.
But, some of my data is drg(base USGS topo map), which are lat/long,
</pre>
</blockquote>
<pre wrap=""><!---->
Most USGS DRG topo maps are georeferenced in UTM (only those that have been
monkeyed with by other agencies are not). Some state and local GIS departments
reprocess them with software that removes the TIFF tags that GDAL would use
to figure out what to do with them, even when they don't change the projection.
Any USGS topo for California will have been reprojected to an equal-area
projection, and any USGS topo covering territory under the authority of the
Tennesee Valley Authority will be in UTM but with no geotiff tags necessary
for GDAL to recognize them. But real USGS topos for any other part of the
US should be in UTM and have GeoTIFF tags identifying the coordinate system.
</pre>
<br>
</blockquote>
<br>
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