Hi Mike,<br><br>if you could just tell me which tools to use to do that (GDAL or Shpproj) I'd be really grateful. <br>best,<br>Nick<br><br><div class="gmail_quote">On Wed, Jun 10, 2009 at 1:04 PM, Michael O'Cleirigh <span dir="ltr"><<a href="mailto:michael.ocleirigh@rivulet.ca">michael.ocleirigh@rivulet.ca</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
Hello, <br>
<br>
I had a similar type of problem with WMS in OpenLayers when showing a
layer served through Geoserver. i.e. The features were offset
incorrectly when reprojected onto a Google Maps base layer.<br>
<br>
My source layer is in the NAD 83 UTM Zone 17N EPSG:26917 projection.
But in order to get it to reproject to the Google EPSG:900913 properly
I needed to first convert the layer into standard NAD 83 degree unit
projection (4269).<br>
<br>
I see that EPSG:32632 is similar to 26917 in that its unit is meter.
Can you try converting the layer into the appropriate WGS84 degree
projection first and see if that helps?<br>
<br>
Regards, <br>
<br>
Mike<br>
<br>
<blockquote type="cite"><div><div></div><div class="h5">Hi Jan,<br>
<br>
Unless I am very much mistaken, <a href="http://www.dmap.co.uk/utmworld.htm" target="_blank">http://www.dmap.co.uk/utmworld.htm</a>
shows Tunisia to be squarely in UTM 32 N. I have ArcGIS and my landsatt
data for the region all fall into UTM 32 N, which is why I believe this
is in fact the case.<br>
<br>
<br>
UTM Zone 32 N is also EPSG:32632 <br>
<br>
<a href="http://spatialreference.org/ref/epsg/32632/" target="_blank">http://spatialreference.org/ref/epsg/32632/</a>
so I still don't know what going on. <br>
<br>
UTM coordinates are arbitrary cartesian points, which basically could
end up anywhere which is why the UTM zone is needed for the origin. The
only thing I can think is that yes, there is some issue with the
projection, but I don't know what.<br>
<br>
<div class="gmail_quote">On Wed, Jun 10, 2009 at 12:38 PM, Jan Martin
<span dir="ltr"><<a href="mailto:janmartin3@googlemail.com" target="_blank">janmartin3@googlemail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi
Nicholas,<br>
<br>
your assumption regarding your source UTM Zone beeing UTM 32N is wrong.<br>
<br>
Your coordinates are from Tunisia. And Tunisia is UTM 32S, not UTM 32N:<br>
<a href="http://upload.wikimedia.org/wikipedia/commons/8/85/LA2-Africa-UTM-zones.png" target="_blank">http://upload.wikimedia.org/wikipedia/commons/8/85/LA2-Africa-UTM-zones.png</a><br>
<br>
But as you can see here EPSG:32632 is the right result of a conversion
from UTM Zone 32S to EPSG:<br>
<a href="http://spatialreference.org/ref/epsg/?search=32632&srtext=Search" target="_blank">http://spatialreference.org/ref/epsg/?search=32632&srtext=Search</a><br>
<br>
Question remains why your coordinates from Tunisia are displayed in
Algeria.<br>
<br>
I wonder if it is OK to just use EPSG:32632 as a projection for your
data, or if one would have to do math on the coordinates to.<br>
After all your coordinates have been recorded in <b>WGS84, UTM 32S.</b><br>
<br>
Jan<br>
<br>
<div class="gmail_quote">
<div>
<div>On Wed, Jun 10, 2009 at 6:08 PM, Nicholas
Efremov-Kendall <span dir="ltr"><<a href="mailto:n.e.kendall@gmail.com" target="_blank">n.e.kendall@gmail.com</a>></span>
wrote:<br>
</div>
</div>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>
<div><br>
<div class="gmail_quote">Hello all,<br>
<br>
I believe this is more of a gis question, than for OpenLayers, but the
problem manifests itself in openlayers and I'm having some trouble
diagnosing it. Jan provided me with some very helpful assistance, which
led me to the conclusion that my projection was wrong. I'm trying to
display gps point originally recorded in UTM 32N. I had mistakenly
believed this was EPSG 22332, but 36232 is actually what I was going
for. My problem is this: I have the points overlaid on a wms server
(thanks to Jan) but they're in the wrong spot. However, when I change
the EPSG code, the points don't move. Does anyone have a suggestion for
why they don't move? and or for how to crack this nut.<br>
best,<br>
Nick<br>
</div>
<br>
<br>
</div>
</div>
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