[gdal-dev] Geometry as EWKB (PostGIS)

[Frank Warmerdam]

On 11-06-29 03:56 PM, Paul Ramsey wrote:
> Hi all (Evan!):
>
> In my FGDB project, the participants compared a file I generated with
> FGDB>PostGIS>FGDB and noticed that the coordinates had drifted a
> little in some cases. Turns out, the PostGIS OGR driver using WKT as
> the transit format, so that's allowing occasional coordinate drift.
> I'd like to write up an EWKB encoder for OGR geometries (or maybe add
> an option to the current encoder to generate EWKB?). Could you
> recommend whether I should do another big utility method like the
> shapeBuffer code, or a method on the OGRGeometry? whether you prefer
> an alteration to existing WKB writer or a separate code path?
>
> I want to avoid what happened last time, having to re-jig the whole
> thing at the end.

Paul,

I think, perhaps, that in trunk and perhaps 1.8.0 EWKB is already used.
I based this partly on the following changeset.  I imagine Even will fill
in the details.

   http://trac.osgeo.org/gdal/changeset/20697/trunk/gdal/ogr/ogrsf_frmts/pg

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    | Geospatial Programmer for Rent