[geotk] Re: Gaus Conform Projection
martin.desruisseaux at geomatys.fr
Tue Sep 15 10:20:02 EDT 2009
theuns a écrit :
> Any chance of the projection being implemented in Geotk?
It depends partially on volunter time. The most tedious part is to write a test
suite. I can help, but chances to see that projection in raisonable time frame
are greater if a volunter can do the following steps:
1) Find the formula. The following web site provides C methods which can
be used as a starting point (if Frank Wamardam give us permission) if
that projection can be found in the list (sometime with a different
2) Copy-and-paste an existing class from Geotk (I suggest
and replace the old formula by the new one.
3) Copy-and-paste an existing test class from Geotk
(e.g. MercatorTest) and replace the tested coordinates by
the one appropriate for the new projection. At least some
of the expected projected coordinates should be computed
by an other software (e.g. ESRI or Proj4).
From that point I can review those two classes, write the corresponding
provider class and commit them. Then there is a final step:
4) Create a new test script similar to Mercator.txt for the new
projection. It is not necessary to have as many test points than
Mercator, but 10 points would be nice.
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