[Proj] rHEALPix new parameters

Michael Speth spethm at landcareresearch.co.nz
Sun Oct 16 17:38:08 PDT 2011


Thanks for looking into this.  Here is a link to the source.  Note, I 
have combined the healpix and rhealpix (still have more to implement on 
rhealpix).  The spole and npole parameters used can be found on lines 
471, 472, 493, and 494.

http://code.scenzgrid.org/index.php/p/scenzgrid-proj4/source/tree/master/src/PJ_healpix.c

Thanks

On 17/10/11 11:55, Frank Warmerdam wrote:
> On Sun, Oct 16, 2011 at 3:27 PM, Michael Speth
> <spethm at landcareresearch.co.nz>  wrote:
>> Thanks Frank!
>> * New Parameters *
>> For adding new parameters, what is the command line syntax?
>>
>> Example: proj -v +proj=rhealpix +lon_0=0 +a=1 +R_A +ellps=WGS84 npole=0
>> spole=0 -E<<EOF 0 0 EOF
>>
>> This doesn't seem to work.  I've also tried using +npole=0 and +spole=0 and
>> also doesn't work.  How do I fix this?
>
> Michael,
>
> I'm not sure.  With the "+" prefix, they should be available for pj_params
> calls.  If you provide your code I could investigate.
>
>> * On Combining 2 Projections into 1 File
>> Typically, there are 2 to 4 Functions FORWARD(s_forward),
>> INVERSE(s_forward), and etc.  Would I need to create 8 of these functions (4
>> for each projection)?
>
> Yes, I imagine so.
>
> Best regards,


-- 
Michael Speth
Scientific Programmer
Landcare Research

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