#1: g.setproj bug: latitude_of_center and longitude_of_center ignored
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Reporter: neteler | Owner: grass-dev@lists.osgeo.org
Type: defect | Status: new
Priority: major | Milestone: 6.3.0
Component: default | Version: svn-trunk
Resolution: | Keywords: proj
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Comment (by pkelly):
Replying to [comment:5 martinl]:
> Replying to [comment:3 pkelly]:
> > Re: the commented-out 7-parameter transform
>
> > I originally put this in and the source is now at
http://www.asprs.org/resources/grids/08-2001-swiss.pdf
>
> > As far as I can remember the two reasons I left it commented were:
>
> > 1) The parameters given are for CH1903+ which is apparently different
from CH1903 - I have no idea how much or if the differences are big enough
to be relevant.
>
> > 2) I didn't have any test points to verify the parameters - in
particular we always need to check the sign of the 3 rotation parameters
(the 4th, 5th and 6th numbers out of the 7) as the American/European
conventions are different.
>
> > If somebody can verify these two points then we can uncomment the
parameters.
>
> I cannot varify it (maybe someone in grass-dev/user ML), but I would
vote for uncomment the parameters and close the ticket (or to postpone it
for 6.4).
>
Well, the original bug seems to be fixed according to Markus' comments, so
no objections from me to closing the bug. I do object very strongly though
to uncommenting the Swiss datum parameters without fully verifying them.
People have been known to rely on and trust what GRASS does (ha ha ;)),
and the onus is on us as developers not to let them down and verify stuff
like this before putting it in there. I did a lot of research and double
checking before I added all the datum parameters that I did, and while I
can't remember the exact details of this one (was quite a while ago) it is
obvious that I had some doubts or it wouldn't be commented out. So until
someone does the work to verify that they are genuinely valid and work
then IMO they should stay disabled.
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Ticket URL: <http://trac.osgeo.org/grass/ticket/1#comment:6>
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