[Proj] Polar stereographic, different values on different platforms?

[Frank Warmerdam]

Bruce Raup wrote:
> Frank and all,
> 
> Has the problem described in the below been resolved yet?  A colleague
> of mine and I have just executed the same "proj" command on Windows
> and Linux, and are getting different results.  Windows version is Rel.
> 4.6.1, 21 Jul 2008.  Linux versions are Rel. 4.5.0, 22 Oct 2006 and
> Rel. 4.6.0, 21 Dec 2007
> 
> Command:
> echo "105 40" | proj +proj=stere +lat_0=90 +lon_0=0 +lat_ts=70 +datum=WGS84
> 
> On both Linux boxes, we get the output
> 5577808.93      1494569.40
> 
> On Windows, my colleague gets:
> 5610189.12      1503245.64
> 
> Using GMT's "mapproject" program, I get the same results as the Linux
> versions of Proj:
> echo "105 40" | mapproject -Js0/90/70/1:1 -C -F -R-180/180/30/90
> 5577808.933369  1494569.399231
> 
> What is the cause the the problem?  There is no change when we specify
> '+ellps=WGS84'.  I searched my archive of the list and found the
> below.

Bruce,

Unfortunately, with the loss of the old PROJ bug tracker, I can't review
the old bug report contents, and I don't recall the details of this problem.

I will say I see the same results you see here (that is, windows and
linux results are different), and I'm running quite recent PROJ.4 code.
So I suspect the issue is not fixed.

Best regards,

...
>> Andrea,
>>
>> I think this is related to the recently reported problem in:
>>
>>  http://bugzilla.remotesensing.org/show_bug.cgi?id=1558
>>
>> Hopefully I'll be able to resolve it though for your purposes I guess
>> you should just ignore the windows proj.4 results for now.
>>
>> 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/~warmerdam
>> and watch the world go round - Rush    | President OSGeo, http://osgeo.org
>>
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>>
> 
> 
> 


-- 
---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam at pobox.com
light and sound - activate the windows | http://pobox.com/~warmerdam
and watch the world go round - Rush    | Geospatial Programmer for Rent