[postgis-devel] LWGEOM for PostGIS 2.0

[Paul Ramsey]

Is vertical datum a separate concern from CRS? Or is a CRS a compound
element including vertical datum, horizontal datum, and projection?

I was thinking that we will use GBOX for the box when we update
LWGEOM, so cover all our dimensional bases. The idea is to upgrade
LWGEOM just enough to mesh with the GSERIALIZED form used by
geography, and flip geometry over to use GSERIALIZED with it.

The question of whether vertical datum needs separate storage ceases
to be academic if we need to serialize it separately. Do we?

P

On Sun, Sep 5, 2010 at 10:45 AM, Olivier Courtin
<olivier.courtin at oslandia.com> wrote:
> Hi,
>
> Related to PostGIS 2.0, i propose a first possible structure
> improve for LWGEOM.
>
> http://trac.osgeo.org/postgis/wiki/LWGeomUpdate
>
> Could be discuss on Friday @Barcelona
>
> Changes:
>  - Have enough spaces for future types -> 255
>  - Enlarge flags available to 8 (so 3 left available)
>  - Add Vertical Datum concept
>  - Use Box3D rather than Box2DFloat
>
>
> Thoughts, reactions ?
>
> --
> Olivier
>
>
> _______________________________________________
> postgis-devel mailing list
> postgis-devel at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-devel
>