On Tue, Jul 14, 2009 at 11:30 PM, Stuart Moffatt<[email protected]> wrote: > Ah, thought there was a catch. Will have to consider an RTree implementation > (any live examples with datastore entities?), but it would be nice to use > JTS' STRtree.
You may also want to check out the approaches used by GeoModel for Python: http://code.google.com/p/geomodel/ - a variant of Geohashing: http://en.wikipedia.org/w/index.php?title=Geohash. A more sophisticated variant is to use a space-filling curve: http://www.ddj.com/184410998 > > What about storing the index as a file in WEB-INF? That's workable, as long as your index is less than 10MB, and read-only. -Nick Johnson > > Stuart > > > On Tue, Jul 14, 2009 at 4:23 PM, Nick Johnson (Google) > <[email protected]> wrote: >> >> Are you aware that Datastore entities are limited to 1MB each? If you >> want to implement an R-Tree, you're probably best off implementing the >> tree using datastore entities. >> >> -Nick Johnson >> >> >> -- >> Nick Johnson, App Engine Developer Programs Engineer >> Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration >> Number: 368047 > > -- Nick Johnson, App Engine Developer Programs Engineer Google Ireland Ltd. :: Registered in Dublin, Ireland, Registration Number: 368047 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
