1 from django.contrib.gis.db import models

     2 

     3 class State(models.Model):

     4     name = models.CharField(max_length=20)

     5     objects = models.GeoManager()

     6 

     7 class County(models.Model):

     8     name = models.CharField(max_length=25)

     9     state = models.ForeignKey(State)

    10     mpoly = models.MultiPolygonField(srid=4269) # Multipolygon in NAD83

    11     objects = models.GeoManager()

    12 

    13 class CountyFeat(models.Model):

    14     name = models.CharField(max_length=25)

    15     poly = models.PolygonField(srid=4269)

    16     objects = models.GeoManager()

    17 

    18 class City(models.Model):

    19     name = models.CharField(max_length=25)

    20     population = models.IntegerField()

    21     density = models.DecimalField(max_digits=7, decimal_places=1)

    22     dt = models.DateField()

    23     point = models.PointField()

    24     objects = models.GeoManager()

    25 

    26 class Interstate(models.Model):

    27     name = models.CharField(max_length=20)

    28     length = models.DecimalField(max_digits=6, decimal_places=2)

    29     path = models.LineStringField()

    30     objects = models.GeoManager()

    31 

    32 # Mapping dictionaries for the models above.

    33 co_mapping = {'name' : 'Name',

    34               'state' : {'name' : 'State'}, # ForeignKey's use another mapping dictionary for the _related_ Model (State in this case).

    35               'mpoly' : 'MULTIPOLYGON', # Will convert POLYGON features into MULTIPOLYGONS.

    36               }

    37 

    38 cofeat_mapping = {'name' : 'Name',

    39                   'poly' : 'POLYGON',

    40                   }

    41 

    42 city_mapping = {'name' : 'Name',

    43                 'population' : 'Population',

    44                 'density' : 'Density',

    45                 'dt' : 'Created',

    46                 'point' : 'POINT',

    47                 }

    48 

    49 inter_mapping = {'name' : 'Name',

    50                  'length' : 'Length',

    51                  'path' : 'LINESTRING',

    52                  }