from django.contrib.gis.db import models from django.utils.encoding import python_2_unicode_compatible from ..utils import gisfield_may_be_null @python_2_unicode_compatible class NamedModel(models.Model): name = models.CharField(max_length=30) objects = models.GeoManager() class Meta: abstract = True def __str__(self): return self.name class SouthTexasCity(NamedModel): "City model on projected coordinate system for South Texas." point = models.PointField(srid=32140) class SouthTexasCityFt(NamedModel): "Same City model as above, but U.S. survey feet are the units." point = models.PointField(srid=2278) class AustraliaCity(NamedModel): "City model for Australia, using WGS84." point = models.PointField() class CensusZipcode(NamedModel): "Model for a few South Texas ZIP codes (in original Census NAD83)." poly = models.PolygonField(srid=4269) class SouthTexasZipcode(NamedModel): "Model for a few South Texas ZIP codes." poly = models.PolygonField(srid=32140, null=gisfield_may_be_null) class Interstate(NamedModel): "Geodetic model for U.S. Interstates." path = models.LineStringField() class SouthTexasInterstate(NamedModel): "Projected model for South Texas Interstates." path = models.LineStringField(srid=32140)