Hi. Now I have found how I get all tings backwards and wrong :) By just going to *Settings-->Options-->CRS*, does NOT change the current project, of course.... For that you need to go to *File-->Project properties *. Thanks for your time
Cheers. 2012/9/23 Johan Nilsson <[email protected]> > 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 <[email protected]> > Date: 2012/9/23 > Subject: Re: [Qgis-user] gfx in WSG 84 added to another CRS (EPSG:3021) > To: Johan Nilsson <[email protected]> > > > > 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 <[email protected]> > >> >> 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 <[email protected]> >> >>> 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: [email protected] >>> To: [email protected] >>> 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 >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/qgis-user >>> >>> _______________________________________________ >>> Qgis-user mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/qgis-user >>> >>> >> >> >> _______________________________________________ >> Qgis-user mailing >> [email protected]http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> >> >> _______________________________________________ >> Qgis-user mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/qgis-user >> >> > > >
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