Changes between Version 19 and Version 20 of GeoDjango

Timestamp:

Feb 27, 2007, 10:22:44 AM (18 years ago)

Author:

Jeremy Dunck <jdunck@…>

Comment:

--

GeoDjango

@@ -28 +28 @@
   Example code, where point and box are types from GeoTypes:
 {{{
-Schools.objects.geo_near(point=x, radius=1.0)
-Schools.objects.geo_within(bound_box=box)
-}}}
+from django.db import models
+from django.contrib.gis import db as gis_db
+
+class School(meta.Model):
+  name = ...
+  objects = gis_db.Manager()
+
+Assume a location column has already been added to the DB, e.g.
+select addgeometrycolumn('','schools_school','location',-1, 'POINT', 2);
+
+Then this would work:
+from django.contrib.gis.geometry import Point
+x = Point(-95.36819458007812, 30.2184318620219)
+School.objects.geo_near('location', point=x, radius=1.0)
+
+This could construct a LinearRing approximating the circle around x
+and issue something like:
+
+poly = "POLYGON (...points from curve approximation...)"
+_where.append("""
+where schools_school.location && %s and
+within(schools_school.location, %s)
+""")
+_params.append(poly, poly)}}}
 
 === Geos ===