On Tue, Aug 11, 2015 at 11:37 PM, Blumentrath, Stefan <stefan.blumentr...@nina.no> wrote: > Dear all, > > Although there is a lot of relevant information regarding the > orthorectification of tilted digital camera images in GRASS GIS online > (here: ... > Does up-slope direction of the photo or sky in the photo conflict with the > orthorectification algorithm?
I have no idea... in general the algorithm is very robust but was really written for aerial photos. > > When it comes to the GCPs I am in principle quite confident that they are > placed OK. Or do you think that GCPs measured by a hand held GPS are too > imprecise? They should be fine. > However, depending on initial camera settings RMS something like 268, which > indicates that something is wrong here. If I do not use i.photo.init, the > image is placed much better (RMS around 10-20), but still pretty poor… About 10 years have passed that I tried the last time, memory is fading... Did you figure it out? ... > Btw: Some of the submodules of i.ortho.photo are not linked to the /bin > folder in GRASS 6.4.5svn, so I have to start them like this: > /usr/local/grass-6.4.5svn/etc/i.photo.init To my knowledge they are intentionally hidden in order to be run from the i.ortho.photo main menu (in GRASS GIS 6). Markus _______________________________________________ grass-user mailing list grass-user@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/grass-user