Hi, Here's an example : [GCC 4.1.3 20070929 (prerelease) (Ubuntu 4.1.2-16ubuntu2)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import geohash >>> hashSW = geohash.Geohash((1.5765380859375,42.894076403348976)) >>> hashNE = geohash.Geohash((6.1907958984375,44.3002644115815)) >>> hashPoi = geohash.Geohash((3.867915,43.733638)) >>> hashPoi > hashSW False >>> hashPoi < hashNE True
With geoIndex : >>> hashSW = geohash.Geoindex((1.5765380859375,42.894076403348976)) >>> hashNE = geohash.Geoindex((6.1907958984375,44.3002644115815)) >>> hashPoi = geohash.Geoindex((3.867915,43.733638)) >>> hashPoi > hashSW False >>> hashPoi < hashNE True I might be missing something but I thought : hash(SW) < hashPoi < hash(NE) How do you use it and do you find something different ? Regards, Pierre On 4 sep, 12:33, Ubaldo Huerta <[EMAIL PROTECTED]> wrote: > Do you have a example of a point whose geohash value isn't greater > than SW, NE geohashes? > > I've tried, in the python interpreter, many examples, and haven't > observed what you're describing. It's pretty scary because I'm writing > a lot of code for a geo app that's based on that property of > geohashes, described athttp://labs.metacarta.com/blog/27.entry/, > working. I knew about equator, etc cases needed special handling, but > I'm not too concerned. > > -U > > On Sep 3, 10:23 pm, Pierre <[EMAIL PROTECTED]> wrote: > > > Hi, > > > I need to find points (lat/lng) within a certain bounding box. To do > > so, I tried Geohash python implementation (http://mappinghacks.com/ > > code/geohash.py.txt). > > > Problem's data is : > > - I have 2 points (South west SW corner / North east NE corner) > > describing a geographic Bounding box > > - I have a model (let's call it 'Poi') having a field "geohash" of > > type Db.StringProperty + Lat and Lng field (Float) > > > Question is : How on earth (lol :-) ) can I find all Poi within my > > bounding box ? > > > I've already tried something like : > > > Create Geohash for SW, create Geohash for NE and do something like : > > > "SELECT * FROM Poi WHERE geohash >:1 and geohash <= :2, geohash(SW), > > geohash(NE)" > > > Also tried with geoindex, at different depth but all this fails and > > still give points not located within Bounding box. > > Also tried like describe in "http://labs.metacarta.com/blog/27.entry/ > > geographic-queries-on-google-app-engine/" to create a small > > surrounding box for each Poi and then create a geohash for this > > specific bounding box to be in between my SW->NE bounding box.... > > > Nothing is working even with "not worst case" (I mean equatorial > > problem...) case/ > > > Any help will be greatly appreciated. > > > Thanks all, > > > Pierre --~--~---------~--~----~------------~-------~--~----~ 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 [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
