Will this box always have 4 points? Will it be a square with right angles? if it's going to be that simple, just write the function yourself.
On May 2, 1:28 pm, Barry Hunter <barrybhun...@googlemail.com> wrote: > Because of the way a geohash is created, chopping off charactors off > the end reduces the percision of the 'point' > > So a given geohash actually represents a box. The more charctors the > smaller the box. > > And because you can do prefix searches on AppEngine, you can just > store the location as a Geohash, and the query on that. limiting the > length of the search string to define your box. > > It works, however the major issue is the boxes aren't symmetric or > consistant, so defining a suitable prefix (or list of prefixes) is not > trivial. > > http://docs.opengeo.org/geospiel/2009/01/22/b-tree-r-tree-we-all-tile... > > On 02/05/2009, Andrew Badera <and...@badera.us> wrote: > > > > > How does geohash help one query a bounded box? Geohash is a single point. > > > Thanks- > > - Andy Badera > > - and...@badera.us > > - Google me:http://www.google.com/search?q=andrew+badera > > > On Sat, May 2, 2009 at 1:13 PM, Jim <jeb62...@gmail.com> wrote: > > > > Have you looked at the geohash approach? > > > >http://geohash.org/site/tips.html > > > >http://pypi.python.org/pypi/Geohash/1.0rc1 > > > > On May 1, 7:40 pm, Matt <mmm...@gmail.com> wrote: > > > > Hello, > > > > > I'm building a simple mapping app that needs to be able to query for > > > > all points inside a box of points. > > > > > I noticed the mutiny library which has a technique for achieving this, > > > > but it occurred to me to ask if there is perhaps a way to do it more > > > > simply using GeoPtProperty properties. The mutiny approach is linked > > > > below: > > >http://code.google.com/p/mutiny/source/browse/trunk/geobox.py > > > > > Any advice on this would be much appreciated. > > -- > Barry > > -www.nearby.org.uk-www.geograph.org.uk- --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
