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Zoltan Szecsei wrote:<br>
<blockquote cite="mid:4B864611.2050001@geograph.co.za" type="cite"><br>
I've tried various -t_srs permutations trying to convert a tiff ortho
from LATLONG to UTM34S but I keep ending up with PROJCS in the Northern
hemisphere, even though the Corner Coordinates show a latitude in the
South. The UTM coords are not in the expected value range, either.<br>
<br>
Note I am not using -s_srs as I am expecting that from the TIFF headers.<br>
<br>
<b>gdalwarp -t_srs 'epsg:32734' 3319bc23.tif bc23.tif</b><br>
Notice the UTM zone, Central Meridian and False Northing in the target
bc23.tif file.<br>
<br>
</blockquote>
The reason for this problem is that the coordinates embedded in the
source tif image are garbage.<br>
The image originates from a SID image, that is in Lo19 Gauss using
Hartebeeshoek94 (epsg:2048)<br>
On export Lizardtech's GeoViewer defaults to LatLong.<br>
<br>
I was able to get the original SID & SDW files for the image, and
noticed that it's contents were Gauss values, so I re-exported the
image from GeoViewer, forcing use of the world files, and now
everything is hunkey-dorey.<br>
<br>
Thanks anyway.<br>
<br>
Kind regards,<br>
Zoltan<br>
<br>
<br>
<br>
<br>
<br>
<pre class="moz-signature" cols="72">--
===========================================
Zoltan Szecsei
Director
Geograph (Pty) Ltd.
P.O. Box 7, Muizenberg 7950, South Africa.
65 Main Road, Muizenberg 7945
Western Cape, South Africa.
34° 6'16.35"S 18°28'5.62"E
Tel: +27-21-7884897 Mobile: +27-83-6004028
Fax: +27-86-6115323 <a class="moz-txt-link-abbreviated" href="http://www.geograph.co.za">www.geograph.co.za</a>
===========================================</pre>
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