[gdal-dev] Re: gdal_rasterize 1.8.0 options

[Jan Hartmann]

For the Dutch case: in 2005 the PROJ-definition for the Dutch national 
system (which uses "Double Stereographic") was changed from "stere" to 
"sterea". See the thread starting at: 
http://lists.osgeo.org/pipermail/gdal-dev/2005-November/007045.html. The 
thread refers to a bug ticket at 
http://bugzilla.remotesensing.org/show_bug.cgi?id=980, but that link 
doesn't exist anymore.

Is there a place to put al the links on the stere-sterea subject 
together? In my experience, discussions about projection parameters  
tend to get fragmented, and even if a solution has been found, old 
errors tend to show up time and again. Sometimes, I can only find the 
solution in my private email archive.

Jan

On 2011-02-07 11:32, Maciej Sieczka wrote:
> W dniu 05.02.2011 14:47, Hermann Peifer pisze:
>> On 05/02/2011 13:12, Even Rouault wrote:
>
>>> I've just had a look, but not being neither Dutch nor a specialist
>>> of (stereographic) projections, I don't feel competent enough to do
>>> any action on it. Those tickets plus the reading of
>>> http://udig.refractions.net/files/docs/api-
>>> geotools/org/geotools/referencing/operation/projection/Stereographic.html 
>>>
>>>  make me deeply confused and wondering if r21627 was really
>>> appropriate.
>
>> Hmm. This page confirms what I mentioned in ticket #2869:
>> "Double_Stereographic" is simply the ESRI alias of
>> "Oblique_Stereographic" (EPSG code 9809).
>>
>> About r21627: I am afraid I do not understand enough about the inner
>>  workings of GDAL/OGR to make a judgement about whether this change
>> was appropriate or not.
>>
>> But by the end of the day and from what I remember when looking
>> somewhat deeper into the issue, about 2 years ago: there is one
>> stereographic projection (known as "the USGS formula" or "the
>> approach given by Snyder") which translates into +proj=stere, and
>> there is the other "Double_Stereographic", aka
>> "Oblique_Stereographic" which is expected to end up as +proj=sterea.
>
> I'm not an expert too, but Hermann findings are in accordance with my
> findings for Polish stereographic CRS (from over 5 years ago):
>
> http://lists.maptools.org/pipermail/proj/2005-March/001524.html
>
> The Polish CRSs which use +proj=sterea version of stereographic are
> 3120, 2172-2174, 3328.
>
> See also Gerald Evendeen's notes:
>
> http://lists.maptools.org/pipermail/proj/2005-March/001526.html
>
> Maciek
>
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