[Proj] ERROR 6: No translation for Double_Stereographic to PROJ.4 format is known.

[Hermann Peifer]

As far as I  remember: Oscar provided the requested test points, so I would guess that the double stereographic projection is now supported

?

Hermann

-------- Original Message  --------
Subject: Re:ERROR 6: No translation for Double_Stereographic to   PROJ.4 format is known.
From: OvV_HN <ovv at hetnet.nl>
To: 
Date: 02/04/2009 17:43

> I can look up some official test points in my files, including references to 
> more or less authoritative sources. Will take a few days, around Sunday 
> perhaps.
> The latest versions of the RDNAP software (Netherlands) indeed do grid 
> interpolation.
> The Dutch Kadaster has/had an on-line transformation tool without grid 
> interpolation, but with Schreiber polynomials, including a small error 
> however.
> Prince Edward test points are described in a Technical Report (no. 48 I 
> believe).
> Romanian test points can be obtained from a Hungarian Excel application by 
> Gábor Timár.
> 
> 
> Oscar van Vlijmen
> 
> 
> ----- Original Message ----- 
> From: "Frank Warmerdam" <warmerdam at pobox.com>
> To: "PROJ.4 and general Projections Discussions" <proj at lists.maptools.org>
> Sent: Tuesday, March 31, 2009 9:27 PM
> Subject: Re: [Proj] ERROR 6: No translation for Double_Stereographic to 
> PROJ.4 format is known.
> 
> 
>> OvV_HN wrote:
>>> I don't get it. I always thought the existing PROJ (and libproj) function
>>> sterea was a full implementation of the double stereographic projection,
>>> suited for Dutch RD, New Brunswick / Prince Edward Island stereo and
>>> Romanian Stereo 70.
>> Oscar,
>>
>> Well, that is possible.  Is someone willing to do some leg work confirming
>> if that is the case, and documenting the correct formulation of the
>> coordinate systems described in http://trac.osgeo.org/gdal/ticket/2487
>> for PROJ.4?  Some sample test points would also be helpful.  Given that
>> I would be happy to update GDAL to support double stereographic and
>> update some other resources.
> 
> 
> 
> _______________________________________________
> Proj mailing list
> Proj at lists.maptools.org
> http://lists.maptools.org/mailman/listinfo/proj
>