Fixed #25205 -- Removed doc references to deprecated GeoManager class.

    Bouke Haarsma <bouke@haarsma.eu>

    Božidar Benko <bbenko@gmail.com>

    Brant Harris

    Brendan Hayward <brendanhayward85@gmail.com>

    Brenton Simpson <http://theillustratedlife.com>

    Brett Cannon <brett@python.org>

    Brett Hoerner <bretthoerner@bretthoerner.com>

        # A projected coordinate system (only valid for South Texas!)

        # is used, units are in meters.

        point = models.PointField(srid=32140)

        objects = models.GeoManager()

Then distance queries may be performed as follows::

    >>> from django.contrib.gis.geos import *

    >>> from django.contrib.gis.geos import fromstr

    >>> from django.contrib.gis.measure import D # ``D`` is a shortcut for ``Distance``

    >>> from geoapp import SouthTexasCity

    >>> from geoapp.models import SouthTexasCity

    # Distances will be calculated from this point, which does not have to be projected.

    >>> pnt = fromstr('POINT(-96.876369 29.905320)', srid=4326)

    # If numeric parameter, units of field (meters in this case) are assumed.

:class:`~django.contrib.gis.db.models.PointField` in the ``AustraliaCity``

queryset is calculated::

    >>> from django.contrib.gis.db.models.functions import Distance

    >>> pnt = AustraliaCity.objects.get(name='Hobart').point

    >>> for city in AustraliaCity.objects.distance('point', pnt):

    >>> for city in AustraliaCity.objects.annotate(distance=Distance('point', pnt)):

    ...     print(city.name, city.distance)

    Wollongong 990071.220408 m

    Shellharbour 972804.613941 m

    This lookup is not available on SpatiaLite.

.. _geoqueryset-methods:

``GeoQuerySet`` Methods

=======================

    class TestGeo(models.Model):

        name = models.CharField(max_length=25) # corresponds to the 'str' field

        poly = models.PolygonField(srid=4269) # we want our model in a different SRID

        objects = models.GeoManager()

        def __str__(self):              # __unicode__ on Python 2

            return 'Name: %s' % self.name