Hi all,
Is it possible to rectify a vector map, i.e. import a map that was drawn
in x,y coordinates and then rectify it to a real projection system, or
does one have to transform the map into raster and then use i.rectify ?
Moritz
Hi,
I've just been trying to do exactly this (with added complications that the vector data is in eps format and full of extra features that I need to get rid of...).
There is a command v.transform that will rectify a vector but it will only do 1st order transformations. If my understanding of georeferencing is right, then you should be able to create a location in the same projection as the vector map source and then a first order transform is all that should be needed. (If I've got this wrong can someone tell me!). Unfortunately, for my data we have no projection information on the vector graphics files and so I think I'm going to have to go down the rasterize, i.rectify, r.poly route..
David
On Friday, July 11, 2003, at 10:04 am, Moritz Lennert wrote:
Hi all,
Is it possible to rectify a vector map, i.e. import a map that was drawn
in x,y coordinates and then rectify it to a real projection system, or
does one have to transform the map into raster and then use i.rectify ?Moritz