If i said in the beguinning of my post I can transform, by save layer as shape, and there choose the RT90 coordinate-system (it say it is in wsg 84). It just when I add a different layer, the transformation to metric system, it's fail.
/Cheers ---------- Forwarded message ---------- From: Bo Victor Thomsen <bo.victor.thom...@gmail.com> Date: 2012/9/23 Subject: Re: [Qgis-user] gfx in WSG 84 added to another CRS (EPSG:3021) To: Johan Nilsson <joni8...@gmail.com> The QGIS on-the-fly re-projection mechanism is able to manage both different ellipsoids, projections and coordinate units. Could the definition of EPSG:3021 in QGIS be wrong ? I'm am 100% sure, that QGIS handles lat/long wgs84 (EPGS:4326) correct. What happens if you convert and re-project the GPX file to shape/EPSG:3021 with ex. *ogr2ogr* ( www.gdal.org - no QGIS involved). Is your converted data then placed correctly ? Regards Bo Victor Thomsen 09-2012 13:16, Johan Nilsson skrev: Don't work May it be that CRS have at least to components? Projections (Shape-models of the earth) and Coordinate-system (defined as a grid from Equator and Greenwich, but different according to the place on earth), and Enable 'on the fly' reprojections don't change units from degrees to the metric Coordinat-system? /Cheers 2012/9/21 Bo Victor Thomsen <bo.victor.thom...@gmail.com> > > 1. Choose a CRS for your _project_ using the menu "Settings" --> > "Project properties" --> Tab "Coordinate Reference System (CRS) and choose > the CRS from the dialog. Remember to enable "on the fly CRS transformation" > 2. Open your layer(s). Don't think about the projection here. > 3. Right-click on each of your layer(s) in the "Layers" dialog and > choose "Set layer CRS". If necessary, choose the CRS for the individual > layer. > > In some cases the CRS for a layer can't be inferred from the information > in the layer's datafile or QGIS can't read it correctly. Executing step 3 > for each "problem" layer corrects this problem. > > Regards > Bo Victor Thomsen > Aestas-GIS > Denmark > > > Den 21-09-2012 09:23, Johan Nilsson skrev: > > When I click Layer-->'Add vector layer.....' I can browse for files, shp, > gpx, and so on, but never chose an CRS in that menu. My Background map are > in RT90 coordinate system in meters approx 1500000,6500000 m but gpx files > come to 17 and 60 m (not degree), way ot of the map... > > > /Cheers > > 2012/9/21 leyan ouyang <ouyang.le...@hotmail.com> > >> Yes it is possible, the option "on-the-fly reprojection" does just >> that. Choose the main CRS as the project CRS (it will be used for distance >> calculations, etc.). Then when you add a layer you can choose its CRS >> individually, QGIS will do the transformation. >> >> Regards, >> >> Leyan >> >> ------------------------------ >> Date: Fri, 21 Sep 2012 09:08:05 +0200 >> From: joni8...@gmail.com >> To: qgis-user@lists.osgeo.org >> Subject: [Qgis-user] gfx in WSG 84 added to another CRS (EPSG:3021) >> >> >> Hi. >> I can transform gpx file from a GPS (WSG84) to an old swedisch CSR >> EPSG:3021 (RT90 2,5 gon V metric coordinate system)) shape file, but I >> whant to let the program transform on the fly. >> >> I know that year 1999 Silicon graphic had it on there 'super coomputers' >> and GIS-softwate, and I also see that QGIS have under menue: >> *Settings-->Options-->CRS*-tab have an option to check 'on the fly >> reprojection' in option. >> >> Under options-->CRS can you define default project CRS and defaut CRS to >> what your add in layers, but If you have a lot of old files with diffenent >> CRS it could be errors. Now Sweden is in transition from RT90 to SweRef99 >> (very near WSG84) >> >> Is it possible to add vector files with other CRS, or even rasters to a >> project without transform it? >> >> /Cheers >> >> >> _______________________________________________ Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> _______________________________________________ >> Qgis-user mailing list >> Qgis-user@lists.osgeo.org >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> > > > _______________________________________________ > Qgis-user mailing > listQgis-user@lists.osgeo.orghttp://lists.osgeo.org/mailman/listinfo/qgis-user > > > > _______________________________________________ > Qgis-user mailing list > Qgis-user@lists.osgeo.org > http://lists.osgeo.org/mailman/listinfo/qgis-user > >
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