Hi Michael, > Yes. This has 6 points like it is supposed to. But the transformation > doesn't work. Doesn't work with more than 6 either.
from g.transform g=roads_streams o=2 f=src,dst,rev,fwd,fd,rd 274.000000 462.000000 598064.018692 4927655.934580 274.000000 462.000000 598064.018692 4927655.934580 0.000000 0.000000 .... I get what I would expect with min number of GPSs for the given order, when I add some other GPSs to the points file I get non-zero fwd/rev errors g.transform g=roads_streams o=2 0.004227 0.007915 0.132068 0.006500 0.047218 0.003247 ... Maybe I don't understand your point here, Regards, Martin 2008/6/17 Michael Barton <[EMAIL PROTECTED]>: > > Michael > > > On 6/17/08 3:44 AM, "GRASS GIS" <[EMAIL PROTECTED]> wrote: > >> #163: g.transform no longer calculating error for 2nd order transformation >> -----------------------+---------------------------------------------------- >> Reporter: cmbarton | Owner: [email protected] >> Type: defect | Status: new >> Priority: major | Milestone: 6.3.1 >> Component: default | Version: svn-develbranch6 >> Resolution: | Keywords: g.transform georectify >> -----------------------+---------------------------------------------------- >> Comment (by martinl): >> >> Replying to [ticket:163 cmbarton]: >>> Sometime recently, g.transform stopped calculating forward and backward >> error for 2nd order transformations. It simply returns 0's. 1st order >> transformations still work fine AFAICT. >> >> The 2nd order transformations requires at least 6 GCPs. Your input POINTS >> file contains 6 points. Then forward/reverse error is 0.0's. >> >> Martin > > __________________________________________ > Michael Barton, Professor of Anthropology > Director of Graduate Studies > School of Human Evolution & Social Change > Center for Social Dynamics & Complexity > Arizona State University > > phone: 480-965-6213 > fax: 480-965-7671 > www: http://www.public.asu.edu/~cmbarton > > > -- Martin Landa <landa.martin gmail.com> * http://gama.fsv.cvut.cz/~landa * _______________________________________________ grass-dev mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-dev
