[gdal-dev] Re: gdal-dev Digest, Vol 44, Issue 28

[Craig Leat]

> Date: Thu, 10 Jan 2008 17:18:41 -0500
> From: Frank Warmerdam <warmerdam at pobox.com>
> Subject: [gdal-dev] Axis Ordering RFC
> To: gdal-dev <gdal-dev at lists.osgeo.org>
> Message-ID: <478699C1.7020701 at pobox.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Folks,
>
> Due to issues with GDAL handling of geographic GMLJP2 files (and issues on
> the horizon with WCS 1.1 support) I'm eager to get "axis order awareness"
> into GDAL 1.6.0.  I have prepared a preliminary RFC and am currently seeking
> feedback.
>
>    http://trac.osgeo.org/gdal/wiki/rfc20_srs_axes
>

Hi

AFAIK, to support the South African datums (EPSG codes: 22275, 22277,
22279, ..., 22293 and 2046 to 2055) axis order and axis orientation
switches are required. Could this RFC be expanded to allow support for
these datums?

Frank when we discussed this 18 months ago you wrote the following:
"My intention for addressing this was to add some sort of +axis...
directives that would tell the pj_transform() function how axis values
need to be remapped.  So, it would require extending the PJ structure
with the axis info, and modifications to pj_transform to apply it,
converting stuff into internal form on the way in, and back to
external form on the way out."

I am not familiar with the API so please excuse me if I have missed the point.

Regards

Craig.