[postgis-users] (E)WKB specification

Frank Warmerdam warmerdam at pobox.com
Tue Oct 25 06:34:24 PDT 2005

On 10/25/05, Lars Rößiger <lars.roessiger at d33.net> wrote:
> Hi.
> Where can I find the WKB and EWKB specifications? I browsed some
> documents on opengis.org without success. I tried a search for WKB but
> no results found :-(


I believe that WKB is defined in the Simple Features for SQL
specification.  I don't think the existing document includes the
2.5D extensions.  There is a separate document floating around
that covers that.

I'm not exactly sure what you mean by EWKB.  There an ISO
SQL MM specification which defines at least a variety of EWKT
that OGC will likely try to align with.  It might include EWKB
(I don't recall).   Of course ISO specs are not normally free.
I got a review copy under the cross agreement between ISO
and OGC.

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

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