Question

I’m creating a geo app with Google Maps and I receive bounding box as 2 coordinates:

• north east
• south west

I have a model with PointField.

from django.contrib.gis.db import models

class Place(models.Model):
    name            = models.CharField(max_length=200)
    address         = models.CharField(max_length=200)

    location        = models.PointField()

How could I perform a query to get all places within bounding box?

Answer 1

Assuming that the “2 coordinates” are x,y tuples, for example:

ne = (50.0, -90)
sw = (45.5, -95)

You can extract the coordinates and create a bounding box tuple:

xmin = sw[0]
ymin = ne[1]
xmax = sw[1]
ymax = ne[0]
bbox = (xmin, ymin, xmax, ymax)

Using the bounding box geometry, query your Place records using a spatial lookup:

from django.contrib.gis.geos import Polygon

geom = Polygon.from_bbox(bbox)
queryset = Place.objects.filter(poly__contained=geom)