1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
from django.contrib.gis.db import models
class State(models.Model):
name = models.CharField(max_length=20)
objects = models.GeoManager()
class County(models.Model):
name = models.CharField(max_length=25)
state = models.ForeignKey(State)
mpoly = models.MultiPolygonField(srid=4269) # Multipolygon in NAD83
objects = models.GeoManager()
class CountyFeat(models.Model):
name = models.CharField(max_length=25)
poly = models.PolygonField(srid=4269)
objects = models.GeoManager()
class City(models.Model):
name = models.CharField(max_length=25)
population = models.IntegerField()
density = models.DecimalField(max_digits=7, decimal_places=1)
dt = models.DateField()
point = models.PointField()
objects = models.GeoManager()
class Interstate(models.Model):
name = models.CharField(max_length=20)
length = models.DecimalField(max_digits=6, decimal_places=2)
path = models.LineStringField()
objects = models.GeoManager()
# Mapping dictionaries for the models above.
co_mapping = {'name' : 'Name',
'state' : {'name' : 'State'}, # ForeignKey's use another mapping dictionary for the _related_ Model (State in this case).
'mpoly' : 'MULTIPOLYGON', # Will convert POLYGON features into MULTIPOLYGONS.
}
cofeat_mapping = {'name' : 'Name',
'poly' : 'POLYGON',
}
city_mapping = {'name' : 'Name',
'population' : 'Population',
'density' : 'Density',
'dt' : 'Created',
'point' : 'POINT',
}
inter_mapping = {'name' : 'Name',
'length' : 'Length',
'path' : 'LINESTRING',
}
|
