On 07/11/2011 10:30 PM, Richard Duivenvoorde wrote: > Hi all, > > I have these pile of scanned old maps and can georeference them with the > good working georeferencer plugin in qgis. > > But do NOT want to really warp the image. Why should we want to store > TWO huge rasters, maybe loosing 'data' contained in the 'original'? > > So my question: is it possible (for Qgis, but preferebly also with other > tools (wms's) to load data from the original raster, probably > accompanied with a txt file with GCP points (or maybe some other format > containing both gcp points and projection/transformation information)? > > Is there some 'common' way for the the world of gis? > > Thanks for any thoughts, > > Richard Duivenvoorde
A world file is the common way. It describes the coordinates of the corners, how many units per pixel and what skew if any. See the wikipedia page for details. I believe the georef plugin can save the a world file for you. Thanks, Alex _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/qgis-user