I have the feeling I'm missing something, here, and I prefer asking the
question here before posting a possible bug report.
What is the exact meaning of zrot in v.transform ? I would have thought
that with no scaling and no shift, zrot would create a simple rotation.
I create a square as such:
v.in.lines in=- out=testline sep=, --o << EOF
610000,200000
680000,200000
Nan,Nan
680000,200000
680000,270000
Nan,Nan
680000,270000
610000,270000
Nan,Nan
610000,270000
610000,200000
EOF
I then try to rotate that squate by 45 degrees:
v.transform input=testline output=testline45 zrotation=45
The result is shown the attached image: The rotation works, but I get a
shift of about 445km NW. Is this expected ?
Moritz
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