[GRASS-dev] i.ortho.photo/lib/ref_points.c and making a REF_POINTS file
dr.yann.chemin at gmail.com
Mon May 8 13:12:10 PDT 2017
Looking for some lore from i.ortho.photo days in GRASS 6 and before...
Within i.image.2target, i.ortho.transform requires a REF_POINTS (image
E, image N, photo X, photo Y) file as part of its RMS error computation,
before using a CONTROL_POINTS (photo X, photo Y, photo Z, control X,
control Y, control Z) file made by i.image.2target interactive GCP
the i.photo.2image module, to my understanding is from (photo X, photo
Y) to (image X, image Y), i.e. we keep in the non-map units, we only
find the proper coordinates of the camera within the camera absolute
dimensions (i.e. mm or other). So I do not believe it is related to
generating a REF_POINTS file.
anybody who extensively used these modules before?
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