Andrew,
Thanks as ever for an excellent answer. To be more specific than "aaacck",
what I don't like about the quadtree implementation Oracle uses is the fact
that it requires parsing spatial data into grids. From the Oracle literature,
the system now better able to search across grid cells, but handles that
automagically (?! Yikes.). The R-tree's capacity and performance are
impressive: who exactly would I say that to at the Emerald City?
I know I have to learn more about this new system; maybe my initial
interjection is unfounded. At any rate, good to see the cartridge taking off,
the partnership, etc. Congrats.
Sam Kome
New address:
Sage Software, Inc.
1289 N. Fordham Blvd A319
Chapel Hill, NC 27514
www.sagesoft.com
[EMAIL PROTECTED] wrote:
> >Still, if MI now supports Oracle's SDO_GEOMETRY and the accompanying
> linear
> >quadtree indexes (aaacck), what becomes of SW_GEOMETRY, and the R-trees?
>
> Our SpatialWare boys report:
>
> It is possible to have both and SDO_GEOMETRY and and SW_GEOMETRY in the
> same
> database however R-trees are not supported. Feedback to Oracle from
> customers
> can result in product changes so if you want to see 8i spatial support
> R-trees,
> then let Oracle know.
>
> The extender lets you read an SW_GEOMETRY and write it as an SDO_GEOMETRY
> (using a caste) and vica versa . If you are using splines and arcs in
> SW_GEOMETRY you will need to continue using SW_GEOMETRY until this support
> appears in SDO_GEOMETRY. If you want to use the spatial extender cartridge
> for this, you will need to use the quad tree index if you wish to avoid
> SpatialWare 'middleware'. The extender functions work on both geometry
> types.
>
> The quadtree will perform well if you use the correct grid parameters. So
> you do have to know your data better than you do with a R-tree (there is
> an admin. tool that helps).
>
> If you need to know more details about what the extender does, this
> information is available from MapInfo.
>
> SpatialWare is also available as an Informix blade and an IBM true
> extender.
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