[OSGeo-Standards] Fwd: Notes from the Geospatial Search meeting in Atlanta

[Raj Singh]

Selected excerpts from Carl Reed's email to OGC membership
---
Raj


Begin forwarded message:

> From: creed at opengeospatial.org
> Date: October 9, 2008 8:41:08 PM GMT+02:00
>
> The invited participants to the meeting included OAB members as well  
> as
> individuals who participate in non-OGC standards activities related to
> search on the web. All the information, including the presentations  
> and
> position papers, can be found on OGCNetwork:
> http://www.ogcnetwork.net/node/396.
>
> A key objective of the meeting was to begin a dialogue between the  
> various
> organizations working geospatial search. The group was able to  
> identify a
> number of suggestions for further consideration and discussion. They  
> also
> recommended that the following ideas be discussed and firm guidance
> provided as soon as possible.
>
> 1. Use the Egenhofer topological operations – terminology and  
> definition,
> per Simple Features model (point, line, polygon)as a fundamental set  
> of
> definitions.
> 2. In any geospatial query language, the minimum spatial parameter is
> BBOX, WGS84, with an implied spatial relation/operator ‘intersects’.  
> So,
> global search might be BBOX(-180,-90,180,90.
> 3. The next geospatial search type that should be defined is the Point
> with radius/distance and units=meters(default)
> 4. For specifying min/max, follow 19107 minx, miny, maxx, maxy pattern
> -90<lat<90, -180<long<180 (in decimal degrees)
> 5. GeoRSS practice is a good example of minimal description
>
> A complete set of all the discussion items and suggested topics for  
> future
> standards work are on the portal in the Atlanta TC - Geospatial  
> folder.
>
> I will be gathering up the notes and completing a more formal report  
> in
> the near future.
>
> Any questions, please let me know.
>
> Regards
>
> Carl Reed
> CTO
> OGC