By the way the SRID for WGS84 UTM32N is 32632, not 36232 as you wrote (typo?)
Nicholas Efremov-Kendall schrieb: > Hi Jan, > > Unless I am very much mistaken, http://www.dmap.co.uk/utmworld.htm > 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. > > > UTM Zone 32 N is also EPSG:32632 > > http://spatialreference.org/ref/epsg/32632/ so I still don't know what > going on. > > 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. > > On Wed, Jun 10, 2009 at 12:38 PM, Jan Martin > <[email protected] <mailto:[email protected]>> wrote: > > Hi Nicholas, > > your assumption regarding your source UTM Zone beeing UTM 32N is > wrong. > > Your coordinates are from Tunisia. And Tunisia is UTM 32S, not UTM > 32N: > > http://upload.wikimedia.org/wikipedia/commons/8/85/LA2-Africa-UTM-zones.png > > But as you can see here EPSG:32632 is the right result of a > conversion from UTM Zone 32S to EPSG: > http://spatialreference.org/ref/epsg/?search=32632&srtext=Search > <http://spatialreference.org/ref/epsg/?search=32632&srtext=Search> > > Question remains why your coordinates from Tunisia are displayed > in Algeria. > > 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. > After all your coordinates have been recorded in *WGS84, UTM 32S.* > > Jan > > On Wed, Jun 10, 2009 at 6:08 PM, Nicholas Efremov-Kendall > <[email protected] <mailto:[email protected]>> wrote: > > > Hello all, > > 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. > best, > Nick > > > _______________________________________________ > Users mailing list > [email protected] <mailto:[email protected]> > http://openlayers.org/mailman/listinfo/users > > > > ------------------------------------------------------------------------ > > _______________________________________________ > Users mailing list > [email protected] > http://openlayers.org/mailman/listinfo/users > -- *Thomas Maschler* AFC International ** Programme d'appui au PSFE (ProPSFE) Expert Forestier/ SIG/ Télédétection www.cameroun-foret.com Coopération Technique Allemande/German Technical Cooperation B.P. 7814 Yaoundé Cameroun/ Cameroon T : + 237 22 21 94 57/ 22 21 06 51 M : +237 74 44 01 60 F : +237 22 21 26 89 _______________________________________________ Users mailing list [email protected] http://openlayers.org/mailman/listinfo/users
