[GRASS5] [bug #2537] (grass) aitoff/winkel tripel fails on rasters
Glynn Clements
glynn.clements at virgin.net
Sat Jul 24 15:18:21 EDT 2004
William K wrote:
> A question about the inverse projection thing - is that a PROJ
> limitation, or a general limitation of the Aitoff/Winkel Tripel
> projection?
I'm not sure how to interpret that question.
The proj library includes inverses for some projections, but not all,
and not for Aitoff or Winkel Tripel.
I suspect that these projections don't have a clearly defined inverse,
i.e. the inverse can't be defined in terms of an algebraic expression,
and there isn't a "standard" approximation.
--
Glynn Clements <glynn.clements at virgin.net>
More information about the grass-dev
mailing list