On Wed, Jan 11, 2012 at 1:25 PM, Bulent Arikan <[email protected]> wrote: > Dear List, > > I found a plan / architectural drawing online. I am not sure about the > resolution but JPG version is 25 Mb and TIFF version is 410 Kb. I want to > import the drawing as vector into 'xy location' and then rectify it. I > already did rectify the image as "raster" but I will need a vector layer. > Looking at 'v.in.ogr' I am not sure how to bring images of such formats into > GRASS as vector. Raster to vector transformation does not work.
Since it is a raster map you have (at least) two options: - use it as background for a digitizer (likely a lot of work) - try image processing to get out raster lines, then r.thin and subsequently r.to.vect with lines. This much depends on the JPG quality. - (there are some autotracer tools, too) Markus _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
