On Mon, Oct 31, 2011 at 11:22 AM, Moritz Lennert <[email protected]> wrote: > On 31/10/11 10:08, Markus Metz wrote: >> >> On Sat, Oct 29, 2011 at 11:25 AM, Moritz Lennert >> <[email protected]> wrote: >>> >>> On 27/10/11 21:10, Moritz Lennert wrote: >>>> >>>> Hello, >>>> >>>> Trying to use the georeferencing tool in 6.4.1, I have the following >>>> question: is it possible to define a vector map as target map when >>>> georeferencing a raster map ? I can't seem to find how to do this. >>> >>> Just to be precise: I'm talking about the tool in the wxgui. >>> >>> Am I the only one seeing this as a problem ? I can work around this by >>> transforming my vector map in a raster and then use the result as target >>> map. But I find this less than ideal. It should be possible to use vector >>> map as reference, not only raster maps. >>> >>> I will file a bug report about this, but was just wondering whether I'm >>> missing something obvious. >> >> Vector support in the georeferencing tool is poor. Ideally the tool >> would have something like a layer manager where you can add as >> reference maps any number and combination of raster and vector maps, >> just like in the regular layer manager. Further more, the C module >> v.rectify is still missing (I want to write it based on v.transfrom >> and v.proj but did not get around yet to do it). > > Ok, so currently I have to use the v.to.rast workaround, then. But does the > solution really have to be a whole layer manager ? Generally one does not > use many different layers as reference maps, so just having a choice between > vector and raster reference maps in the preparatory steps of the tool should > be enough IMHO.
OK. Then the option for reference maps could be one raster map and/or one vector map (vector map always on top of raster map). > > v.rectify is still another issue. v.transform probably covers most of the > use cases anyway, or ? Yes, apart from the case when source and target LOCATION_NAME are different. This is handled by v.proj. Since GCPs are specific for a given source / target location combination, a TARGET like for imagery groups would also be needed. Markus M _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
