[postgis-users] Re: Bugus SRS

[Paul Ramsey]

This is one of those places where some test cases would be handy. IE: I 
know this point in lat/lon is this place in the projected coordinate 
system and this place in the geocentric coordinate system.

Frank Warmerdam wrote:

> On 5/5/05, strk at refractions.net <strk at refractions.net> wrote:
> 
>>Nicolas, we just changed the entry you pointed our attention on:
>>SRID=27582
>>
>>You reported it worked for you with entries shipped with postgis
>>pre 1.0.0:
> 
> 
>>That entry already had a lon_0 != 0.
>>
>>Since these entries are extracted by a script in gdal/ogr
>>I think it's worth fixing them in the source data repository
>>first.
>>
>>Frank, did you check this out lately ?
> 
> 
> Strk,
> 
> I am aware of outstanding problems with the NTF coordinate systems.
> I think the problem is related to the non-greenwich prime meridian
> but it could also be related to the use of gradians.   There is an 
> open bug report on the issue, but I haven't dug into it. 
> 
> Best regards,