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Home -> Community -> Usenet -> c.d.o.server -> Re: Ellipse Data Type? Best practices for elliptical data? [Oracle 9i Spatial]
C Wilks wrote:
>
> I will just be using a standard geodetic spatial reference system,
> probably WGS84 from what I can gather so far. I'm just trying to store
> geodetic ellipses, and then compare them with other shapes using the
> standard spatial predicates.
Sounds intriguing.
Since coord systems & their projections are based on datum that reference ellipsoids, I can image the error calc's involved when your ellipse doesn't agree with the datum will be hairy.
Mind expanding why you are doing this? Perhaps off-list to contact_forbrich at telus planet dot net, without spaces or contact_
Nevertheless, since 9i geodetics don't directly support arcs, you will need to approximate your ellipse. You might find the description of the arc densification function useful.
/Hans Received on Tue May 18 2004 - 13:47:11 CDT