[fdo-internals] RFC 11 has been posted

Frank Warmerdam warmerdam at pobox.com
Fri Sep 7 15:56:14 EDT 2007

Orest Halustchak wrote:
> Hi Frank,
> The FDO api does not include any coordinate system transformation
> abilities. The only coordinate system information that is included is
> the ability to specify a coordinate system for a geometry property (via
> spatial context) and to get that information back when describing that
> property. There are no commands to specify input or output coordinate
> systems for the purposes of projecting coordinates.
> All projection work so far has been done by client applications, e.g.
> MapGuide projects coordinates into the map coordinate system after
> retrieving geometry from the provider. This does ensure that a
> consistent projection library is used regardless of which provider the
> data is coming from.


OK, I can understand that, and it might be foolish to start introducing
reprojection without some consideration.  But is this our long term plan?

It seems like it puts an unnecessary load on applications and the
disconnectedness of FDO's spatial reference descriptions from a coordinate
system transformation library may impede FDO adoption.

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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