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 # Same as `City` above, but for testing model inheritance.

    33 class CityBase(models.Model):

    34     name = models.CharField(max_length=25)

    35     population = models.IntegerField()

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

    37     point = models.PointField()

    38     objects = models.GeoManager()

    39 

    40 class ICity1(CityBase):

    41     dt = models.DateField()

    42     

    43 class ICity2(ICity1):

    44     dt_time = models.DateTimeField(auto_now=True)

    45 

    46 # Mapping dictionaries for the models above.

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

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

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

    50               }

    51 

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

    53                   'poly' : 'POLYGON',

    54                   }

    55 

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

    57                 'population' : 'Population',

    58                 'density' : 'Density',

    59                 'dt' : 'Created',

    60                 'point' : 'POINT',

    61                 }

    62 

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

    64                  'length' : 'Length',

    65                  'path' : 'LINESTRING',

    66                  }