[Proj] rHEALPix new parameters
Frank Warmerdam
warmerdam at pobox.com
Thu Oct 13 23:43:58 EST 2011
On 11-10-13 06:22 PM, Michael Speth wrote:
> Greetings,
> I've implemented the HEALPix projection and have now moved on to
> implementing a new projection called rHEALPix. I have two questions
> regarding this implementation.
>
> * rHEALPix requires 2 new parameters (spole and npole). How do I
> specify those parameters on the command line? (In the code I am using
> the pr_param function.
Michael,
To the best of my knowledge you just grab them with pj_param(). You
don't need to do anything special to declare them.
> * The rHEALPix projection uses the HEALPix projection. So is it
> possible to create a header with corresponding c file that shares common
> functions between the HEALPix and rHEALPix projections? If so, how
> should I name the files?
I would suggest just putting both projections in one source file to avoid
needing the external header file. It is not uncommon to have more than one
related projection in a single file (eg. tmerc and utm in PJ_tmerc).
Best regards,
--
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/warmerda
and watch the world go round - Rush | Geospatial Software Developer
More information about the Proj
mailing list