Worldfiles does not store CRS information. It simply provides you: pixel units, rotation, x,y coordinate of the center of the upper left pixel: http://en.wikipedia.org/wiki/World_file
You need to set the coordinate system in the Layer Properties > General > Specify CRS to view the raster in the proper CRS. On Mon, Dec 13, 2010 at 3:37 PM, LeventB <[email protected]> wrote: > > Hi there! > As i am writing a tutorial for open-source GIS, i want to make students > familiar with the world file connected to a *.tif. The goal is to > georeference a raster map by editing the *.tfw, which works well in ArcGIS. > There, i proceed in the following way: > > 1. Open the *.tfw with an editor > 2. Adjust the coordinates > 3. Save the *.tfw > 4. Delete the *.aux file > 5. Load the map to the canvas > > Strangely, this procedure doesn't have any effect in QGIS. Even if i delete > every related file except from the *.tfw and the *.tif itself, the map will > display the same as before. I wonder where QGIS gets the coordinates? > > Does anyone have an idea? > > Thanks and have a nice week, > Levent > -- > View this message in context: > http://osgeo-org.1803224.n2.nabble.com/Editing-the-world-file-tp5829927p5829927.html > Sent from the qgis-user mailing list archive at Nabble.com. > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > -- cheers, maning ------------------------------------------------------ "Freedom is still the most radical idea of all" -N.Branden wiki: http://esambale.wikispaces.com/ blog: http://epsg4253.wordpress.com/ ------------------------------------------------------ _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
