At 16:27 -0400 8/12/05, douglass_davis@stripped wrote:
>To the powers that be: Can we get a MySql GIS/spatial list?? This
>is going to be a very popular area (actually it is already).
>
>
>I am trying to use the Spatial extensions to MySql. To be honest
>PostGIS has many more features, but MySql is my favorite, and on top
>of that, the applications I am using only work with MySql.
>
>My problem is this. From the manual, all Geometry contains:
>
>Its SRID, or Spatial Reference Identifier. This value identifies the
>geometry's associated Spatial Reference System that describes the
>coordinate space in which the geometry object is defined.
>
>In MySQL, the SRID value is just an integer associated with the
>geometry value. All calculations are done assuming Euclidean
>(planar) geometry.
>
>This is a big issue. Will this be the same in version 5? Or will
>the SRIDs actually be used? I would like to just represent
>everything in lat/lon, not on a planar surface. Now, if the SRIDs
>are used in MySql 5, where is the list of acceptable values?
As far as I know, it's the same in MySQL 5.
>
>Also, to developers on the list: perhaps it would be better if these
>were text values like 'NAD83'??
I think that is unlikely to happen. The OpenGIS spec defines the
SRID to be an integer, and the SRID() function to be an integer-valued
function.
--
Paul DuBois, MySQL Documentation Team
Madison, Wisconsin, USA
MySQL AB, www.mysql.com
