mirror of
https://github.com/django/django.git
synced 2024-12-28 12:06:22 +00:00
563 lines
26 KiB
Python
563 lines
26 KiB
Python
import json
|
|
import math
|
|
import re
|
|
from decimal import Decimal
|
|
|
|
from django.contrib.gis.db.models import functions
|
|
from django.contrib.gis.geos import (
|
|
GEOSGeometry, LineString, Point, Polygon, fromstr,
|
|
)
|
|
from django.contrib.gis.measure import Area
|
|
from django.db import NotSupportedError, connection
|
|
from django.db.models import Sum
|
|
from django.test import TestCase, skipUnlessDBFeature
|
|
|
|
from ..utils import FuncTestMixin, mysql, oracle, postgis, spatialite
|
|
from .models import City, Country, CountryWebMercator, State, Track
|
|
|
|
|
|
class GISFunctionsTests(FuncTestMixin, TestCase):
|
|
"""
|
|
Testing functions from django/contrib/gis/db/models/functions.py.
|
|
Area/Distance/Length/Perimeter are tested in distapp/tests.
|
|
|
|
Please keep the tests in function's alphabetic order.
|
|
"""
|
|
fixtures = ['initial']
|
|
|
|
def test_asgeojson(self):
|
|
# Only PostGIS and SpatiaLite support GeoJSON.
|
|
if not connection.features.has_AsGeoJSON_function:
|
|
with self.assertRaises(NotSupportedError):
|
|
list(Country.objects.annotate(json=functions.AsGeoJSON('mpoly')))
|
|
return
|
|
|
|
pueblo_json = '{"type":"Point","coordinates":[-104.609252,38.255001]}'
|
|
houston_json = (
|
|
'{"type":"Point","crs":{"type":"name","properties":'
|
|
'{"name":"EPSG:4326"}},"coordinates":[-95.363151,29.763374]}'
|
|
)
|
|
victoria_json = (
|
|
'{"type":"Point","bbox":[-123.30519600,48.46261100,-123.30519600,48.46261100],'
|
|
'"coordinates":[-123.305196,48.462611]}'
|
|
)
|
|
chicago_json = (
|
|
'{"type":"Point","crs":{"type":"name","properties":{"name":"EPSG:4326"}},'
|
|
'"bbox":[-87.65018,41.85039,-87.65018,41.85039],"coordinates":[-87.65018,41.85039]}'
|
|
)
|
|
# MySQL ignores the crs option.
|
|
if mysql:
|
|
houston_json = json.loads(houston_json)
|
|
del houston_json['crs']
|
|
chicago_json = json.loads(chicago_json)
|
|
del chicago_json['crs']
|
|
|
|
# Precision argument should only be an integer
|
|
with self.assertRaises(TypeError):
|
|
City.objects.annotate(geojson=functions.AsGeoJSON('point', precision='foo'))
|
|
|
|
# Reference queries and values.
|
|
# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 0)
|
|
# FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Pueblo';
|
|
self.assertJSONEqual(
|
|
pueblo_json,
|
|
City.objects.annotate(geojson=functions.AsGeoJSON('point')).get(name='Pueblo').geojson
|
|
)
|
|
|
|
# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 2) FROM "geoapp_city"
|
|
# WHERE "geoapp_city"."name" = 'Houston';
|
|
# This time we want to include the CRS by using the `crs` keyword.
|
|
self.assertJSONEqual(
|
|
City.objects.annotate(json=functions.AsGeoJSON('point', crs=True)).get(name='Houston').json,
|
|
houston_json,
|
|
)
|
|
|
|
# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 1) FROM "geoapp_city"
|
|
# WHERE "geoapp_city"."name" = 'Houston';
|
|
# This time we include the bounding box by using the `bbox` keyword.
|
|
self.assertJSONEqual(
|
|
victoria_json,
|
|
City.objects.annotate(
|
|
geojson=functions.AsGeoJSON('point', bbox=True)
|
|
).get(name='Victoria').geojson
|
|
)
|
|
|
|
# SELECT ST_AsGeoJson("geoapp_city"."point", 5, 3) FROM "geoapp_city"
|
|
# WHERE "geoapp_city"."name" = 'Chicago';
|
|
# Finally, we set every available keyword.
|
|
self.assertJSONEqual(
|
|
City.objects.annotate(
|
|
geojson=functions.AsGeoJSON('point', bbox=True, crs=True, precision=5)
|
|
).get(name='Chicago').geojson,
|
|
chicago_json,
|
|
)
|
|
|
|
@skipUnlessDBFeature("has_AsGML_function")
|
|
def test_asgml(self):
|
|
# Should throw a TypeError when trying to obtain GML from a
|
|
# non-geometry field.
|
|
qs = City.objects.all()
|
|
with self.assertRaises(TypeError):
|
|
qs.annotate(gml=functions.AsGML('name'))
|
|
ptown = City.objects.annotate(gml=functions.AsGML('point', precision=9)).get(name='Pueblo')
|
|
|
|
if oracle:
|
|
# No precision parameter for Oracle :-/
|
|
gml_regex = re.compile(
|
|
r'^<gml:Point srsName="EPSG:4326" xmlns:gml="http://www.opengis.net/gml">'
|
|
r'<gml:coordinates decimal="\." cs="," ts=" ">-104.60925\d+,38.25500\d+ '
|
|
r'</gml:coordinates></gml:Point>'
|
|
)
|
|
else:
|
|
gml_regex = re.compile(
|
|
r'^<gml:Point srsName="EPSG:4326"><gml:coordinates>'
|
|
r'-104\.60925\d+,38\.255001</gml:coordinates></gml:Point>'
|
|
)
|
|
self.assertTrue(gml_regex.match(ptown.gml))
|
|
self.assertIn(
|
|
'<gml:pos srsDimension="2">',
|
|
City.objects.annotate(gml=functions.AsGML('point', version=3)).get(name='Pueblo').gml
|
|
)
|
|
|
|
@skipUnlessDBFeature("has_AsKML_function")
|
|
def test_askml(self):
|
|
# Should throw a TypeError when trying to obtain KML from a
|
|
# non-geometry field.
|
|
with self.assertRaises(TypeError):
|
|
City.objects.annotate(kml=functions.AsKML('name'))
|
|
|
|
# Ensuring the KML is as expected.
|
|
ptown = City.objects.annotate(kml=functions.AsKML('point', precision=9)).get(name='Pueblo')
|
|
self.assertEqual('<Point><coordinates>-104.609252,38.255001</coordinates></Point>', ptown.kml)
|
|
|
|
@skipUnlessDBFeature("has_AsSVG_function")
|
|
def test_assvg(self):
|
|
with self.assertRaises(TypeError):
|
|
City.objects.annotate(svg=functions.AsSVG('point', precision='foo'))
|
|
# SELECT AsSVG(geoapp_city.point, 0, 8) FROM geoapp_city WHERE name = 'Pueblo';
|
|
svg1 = 'cx="-104.609252" cy="-38.255001"'
|
|
# Even though relative, only one point so it's practically the same except for
|
|
# the 'c' letter prefix on the x,y values.
|
|
svg2 = svg1.replace('c', '')
|
|
self.assertEqual(svg1, City.objects.annotate(svg=functions.AsSVG('point')).get(name='Pueblo').svg)
|
|
self.assertEqual(svg2, City.objects.annotate(svg=functions.AsSVG('point', relative=5)).get(name='Pueblo').svg)
|
|
|
|
@skipUnlessDBFeature("has_Azimuth_function")
|
|
def test_azimuth(self):
|
|
# Returns the azimuth in radians.
|
|
azimuth_expr = functions.Azimuth(Point(0, 0, srid=4326), Point(1, 1, srid=4326))
|
|
self.assertAlmostEqual(City.objects.annotate(azimuth=azimuth_expr).first().azimuth, math.pi / 4)
|
|
# Returns None if the two points are coincident.
|
|
azimuth_expr = functions.Azimuth(Point(0, 0, srid=4326), Point(0, 0, srid=4326))
|
|
self.assertIsNone(City.objects.annotate(azimuth=azimuth_expr).first().azimuth)
|
|
|
|
@skipUnlessDBFeature("has_BoundingCircle_function")
|
|
def test_bounding_circle(self):
|
|
def circle_num_points(num_seg):
|
|
# num_seg is the number of segments per quarter circle.
|
|
return (4 * num_seg) + 1
|
|
|
|
expected_areas = (169, 136) if postgis else (171, 126)
|
|
qs = Country.objects.annotate(circle=functions.BoundingCircle('mpoly')).order_by('name')
|
|
self.assertAlmostEqual(qs[0].circle.area, expected_areas[0], 0)
|
|
self.assertAlmostEqual(qs[1].circle.area, expected_areas[1], 0)
|
|
if postgis:
|
|
# By default num_seg=48.
|
|
self.assertEqual(qs[0].circle.num_points, circle_num_points(48))
|
|
self.assertEqual(qs[1].circle.num_points, circle_num_points(48))
|
|
|
|
qs = Country.objects.annotate(circle=functions.BoundingCircle('mpoly', num_seg=12)).order_by('name')
|
|
if postgis:
|
|
self.assertGreater(qs[0].circle.area, 168.4, 0)
|
|
self.assertLess(qs[0].circle.area, 169.5, 0)
|
|
self.assertAlmostEqual(qs[1].circle.area, 136, 0)
|
|
self.assertEqual(qs[0].circle.num_points, circle_num_points(12))
|
|
self.assertEqual(qs[1].circle.num_points, circle_num_points(12))
|
|
else:
|
|
self.assertAlmostEqual(qs[0].circle.area, expected_areas[0], 0)
|
|
self.assertAlmostEqual(qs[1].circle.area, expected_areas[1], 0)
|
|
|
|
@skipUnlessDBFeature("has_Centroid_function")
|
|
def test_centroid(self):
|
|
qs = State.objects.exclude(poly__isnull=True).annotate(centroid=functions.Centroid('poly'))
|
|
tol = 1.8 if mysql else (0.1 if oracle else 0.00001)
|
|
for state in qs:
|
|
self.assertTrue(state.poly.centroid.equals_exact(state.centroid, tol))
|
|
|
|
with self.assertRaisesMessage(TypeError, "'Centroid' takes exactly 1 argument (2 given)"):
|
|
State.objects.annotate(centroid=functions.Centroid('poly', 'poly'))
|
|
|
|
@skipUnlessDBFeature("has_Difference_function")
|
|
def test_difference(self):
|
|
geom = Point(5, 23, srid=4326)
|
|
qs = Country.objects.annotate(diff=functions.Difference('mpoly', geom))
|
|
# Oracle does something screwy with the Texas geometry.
|
|
if oracle:
|
|
qs = qs.exclude(name='Texas')
|
|
|
|
for c in qs:
|
|
self.assertTrue(c.mpoly.difference(geom).equals(c.diff))
|
|
|
|
@skipUnlessDBFeature("has_Difference_function", "has_Transform_function")
|
|
def test_difference_mixed_srid(self):
|
|
"""Testing with mixed SRID (Country has default 4326)."""
|
|
geom = Point(556597.4, 2632018.6, srid=3857) # Spherical Mercator
|
|
qs = Country.objects.annotate(difference=functions.Difference('mpoly', geom))
|
|
# Oracle does something screwy with the Texas geometry.
|
|
if oracle:
|
|
qs = qs.exclude(name='Texas')
|
|
for c in qs:
|
|
self.assertTrue(c.mpoly.difference(geom).equals(c.difference))
|
|
|
|
@skipUnlessDBFeature("has_Envelope_function")
|
|
def test_envelope(self):
|
|
countries = Country.objects.annotate(envelope=functions.Envelope('mpoly'))
|
|
for country in countries:
|
|
self.assertTrue(country.envelope.equals(country.mpoly.envelope))
|
|
|
|
@skipUnlessDBFeature("has_ForcePolygonCW_function")
|
|
def test_force_polygon_cw(self):
|
|
rings = (
|
|
((0, 0), (5, 0), (0, 5), (0, 0)),
|
|
((1, 1), (1, 3), (3, 1), (1, 1)),
|
|
)
|
|
rhr_rings = (
|
|
((0, 0), (0, 5), (5, 0), (0, 0)),
|
|
((1, 1), (3, 1), (1, 3), (1, 1)),
|
|
)
|
|
State.objects.create(name='Foo', poly=Polygon(*rings))
|
|
st = State.objects.annotate(force_polygon_cw=functions.ForcePolygonCW('poly')).get(name='Foo')
|
|
self.assertEqual(rhr_rings, st.force_polygon_cw.coords)
|
|
|
|
@skipUnlessDBFeature("has_GeoHash_function")
|
|
def test_geohash(self):
|
|
# Reference query:
|
|
# SELECT ST_GeoHash(point) FROM geoapp_city WHERE name='Houston';
|
|
# SELECT ST_GeoHash(point, 5) FROM geoapp_city WHERE name='Houston';
|
|
ref_hash = '9vk1mfq8jx0c8e0386z6'
|
|
h1 = City.objects.annotate(geohash=functions.GeoHash('point')).get(name='Houston')
|
|
h2 = City.objects.annotate(geohash=functions.GeoHash('point', precision=5)).get(name='Houston')
|
|
self.assertEqual(ref_hash, h1.geohash[:len(ref_hash)])
|
|
self.assertEqual(ref_hash[:5], h2.geohash)
|
|
|
|
@skipUnlessDBFeature("has_Intersection_function")
|
|
def test_intersection(self):
|
|
geom = Point(5, 23, srid=4326)
|
|
qs = Country.objects.annotate(inter=functions.Intersection('mpoly', geom))
|
|
for c in qs:
|
|
if spatialite or (mysql and not connection.features.supports_empty_geometry_collection) or oracle:
|
|
# When the intersection is empty, some databases return None.
|
|
expected = None
|
|
else:
|
|
expected = c.mpoly.intersection(geom)
|
|
self.assertEqual(c.inter, expected)
|
|
|
|
@skipUnlessDBFeature("has_IsValid_function")
|
|
def test_isvalid(self):
|
|
valid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))')
|
|
invalid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 1 1, 1 0, 0 0))')
|
|
State.objects.create(name='valid', poly=valid_geom)
|
|
State.objects.create(name='invalid', poly=invalid_geom)
|
|
valid = State.objects.filter(name='valid').annotate(isvalid=functions.IsValid('poly')).first()
|
|
invalid = State.objects.filter(name='invalid').annotate(isvalid=functions.IsValid('poly')).first()
|
|
self.assertIs(valid.isvalid, True)
|
|
self.assertIs(invalid.isvalid, False)
|
|
|
|
@skipUnlessDBFeature("has_Area_function")
|
|
def test_area_with_regular_aggregate(self):
|
|
# Create projected country objects, for this test to work on all backends.
|
|
for c in Country.objects.all():
|
|
CountryWebMercator.objects.create(name=c.name, mpoly=c.mpoly.transform(3857, clone=True))
|
|
# Test in projected coordinate system
|
|
qs = CountryWebMercator.objects.annotate(area_sum=Sum(functions.Area('mpoly')))
|
|
# Some backends (e.g. Oracle) cannot group by multipolygon values, so
|
|
# defer such fields in the aggregation query.
|
|
for c in qs.defer('mpoly'):
|
|
result = c.area_sum
|
|
# If the result is a measure object, get value.
|
|
if isinstance(result, Area):
|
|
result = result.sq_m
|
|
self.assertAlmostEqual((result - c.mpoly.area) / c.mpoly.area, 0)
|
|
|
|
@skipUnlessDBFeature("has_Area_function")
|
|
def test_area_lookups(self):
|
|
# Create projected countries so the test works on all backends.
|
|
CountryWebMercator.objects.bulk_create(
|
|
CountryWebMercator(name=c.name, mpoly=c.mpoly.transform(3857, clone=True))
|
|
for c in Country.objects.all()
|
|
)
|
|
qs = CountryWebMercator.objects.annotate(area=functions.Area('mpoly'))
|
|
self.assertEqual(qs.get(area__lt=Area(sq_km=500000)), CountryWebMercator.objects.get(name='New Zealand'))
|
|
|
|
with self.assertRaisesMessage(ValueError, 'AreaField only accepts Area measurement objects.'):
|
|
qs.get(area__lt=500000)
|
|
|
|
@skipUnlessDBFeature("has_LineLocatePoint_function")
|
|
def test_line_locate_point(self):
|
|
pos_expr = functions.LineLocatePoint(LineString((0, 0), (0, 3), srid=4326), Point(0, 1, srid=4326))
|
|
self.assertAlmostEqual(State.objects.annotate(pos=pos_expr).first().pos, 0.3333333)
|
|
|
|
@skipUnlessDBFeature("has_MakeValid_function")
|
|
def test_make_valid(self):
|
|
invalid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 1 1, 1 0, 0 0))')
|
|
State.objects.create(name='invalid', poly=invalid_geom)
|
|
invalid = State.objects.filter(name='invalid').annotate(repaired=functions.MakeValid('poly')).first()
|
|
self.assertIs(invalid.repaired.valid, True)
|
|
self.assertEqual(invalid.repaired, fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))', srid=invalid.poly.srid))
|
|
|
|
@skipUnlessDBFeature("has_MemSize_function")
|
|
def test_memsize(self):
|
|
ptown = City.objects.annotate(size=functions.MemSize('point')).get(name='Pueblo')
|
|
self.assertTrue(20 <= ptown.size <= 40) # Exact value may depend on PostGIS version
|
|
|
|
@skipUnlessDBFeature("has_NumGeom_function")
|
|
def test_num_geom(self):
|
|
# Both 'countries' only have two geometries.
|
|
for c in Country.objects.annotate(num_geom=functions.NumGeometries('mpoly')):
|
|
self.assertEqual(2, c.num_geom)
|
|
|
|
qs = City.objects.filter(point__isnull=False).annotate(num_geom=functions.NumGeometries('point'))
|
|
for city in qs:
|
|
# Oracle and PostGIS return 1 for the number of geometries on
|
|
# non-collections, whereas MySQL returns None.
|
|
if mysql:
|
|
self.assertIsNone(city.num_geom)
|
|
else:
|
|
self.assertEqual(1, city.num_geom)
|
|
|
|
@skipUnlessDBFeature("has_NumPoint_function")
|
|
def test_num_points(self):
|
|
coords = [(-95.363151, 29.763374), (-95.448601, 29.713803)]
|
|
Track.objects.create(name='Foo', line=LineString(coords))
|
|
qs = Track.objects.annotate(num_points=functions.NumPoints('line'))
|
|
self.assertEqual(qs.first().num_points, 2)
|
|
mpoly_qs = Country.objects.annotate(num_points=functions.NumPoints('mpoly'))
|
|
if not connection.features.supports_num_points_poly:
|
|
for c in mpoly_qs:
|
|
self.assertIsNone(c.num_points)
|
|
return
|
|
|
|
for c in mpoly_qs:
|
|
self.assertEqual(c.mpoly.num_points, c.num_points)
|
|
|
|
for c in City.objects.annotate(num_points=functions.NumPoints('point')):
|
|
self.assertEqual(c.num_points, 1)
|
|
|
|
@skipUnlessDBFeature("has_PointOnSurface_function")
|
|
def test_point_on_surface(self):
|
|
# Reference values.
|
|
if oracle:
|
|
# SELECT SDO_UTIL.TO_WKTGEOMETRY(SDO_GEOM.SDO_POINTONSURFACE(GEOAPP_COUNTRY.MPOLY, 0.05))
|
|
# FROM GEOAPP_COUNTRY;
|
|
ref = {
|
|
'New Zealand': fromstr('POINT (174.616364 -36.100861)', srid=4326),
|
|
'Texas': fromstr('POINT (-103.002434 36.500397)', srid=4326),
|
|
}
|
|
else:
|
|
# Using GEOSGeometry to compute the reference point on surface values
|
|
# -- since PostGIS also uses GEOS these should be the same.
|
|
ref = {
|
|
'New Zealand': Country.objects.get(name='New Zealand').mpoly.point_on_surface,
|
|
'Texas': Country.objects.get(name='Texas').mpoly.point_on_surface
|
|
}
|
|
|
|
qs = Country.objects.annotate(point_on_surface=functions.PointOnSurface('mpoly'))
|
|
for country in qs:
|
|
tol = 0.00001 # SpatiaLite might have WKT-translation-related precision issues
|
|
self.assertTrue(ref[country.name].equals_exact(country.point_on_surface, tol))
|
|
|
|
@skipUnlessDBFeature("has_Reverse_function")
|
|
def test_reverse_geom(self):
|
|
coords = [(-95.363151, 29.763374), (-95.448601, 29.713803)]
|
|
Track.objects.create(name='Foo', line=LineString(coords))
|
|
track = Track.objects.annotate(reverse_geom=functions.Reverse('line')).get(name='Foo')
|
|
coords.reverse()
|
|
self.assertEqual(tuple(coords), track.reverse_geom.coords)
|
|
|
|
@skipUnlessDBFeature("has_Scale_function")
|
|
def test_scale(self):
|
|
xfac, yfac = 2, 3
|
|
tol = 5 # The low precision tolerance is for SpatiaLite
|
|
qs = Country.objects.annotate(scaled=functions.Scale('mpoly', xfac, yfac))
|
|
for country in qs:
|
|
for p1, p2 in zip(country.mpoly, country.scaled):
|
|
for r1, r2 in zip(p1, p2):
|
|
for c1, c2 in zip(r1.coords, r2.coords):
|
|
self.assertAlmostEqual(c1[0] * xfac, c2[0], tol)
|
|
self.assertAlmostEqual(c1[1] * yfac, c2[1], tol)
|
|
# Test float/Decimal values
|
|
qs = Country.objects.annotate(scaled=functions.Scale('mpoly', 1.5, Decimal('2.5')))
|
|
self.assertGreater(qs[0].scaled.area, qs[0].mpoly.area)
|
|
|
|
@skipUnlessDBFeature("has_SnapToGrid_function")
|
|
def test_snap_to_grid(self):
|
|
# Let's try and break snap_to_grid() with bad combinations of arguments.
|
|
for bad_args in ((), range(3), range(5)):
|
|
with self.assertRaises(ValueError):
|
|
Country.objects.annotate(snap=functions.SnapToGrid('mpoly', *bad_args))
|
|
for bad_args in (('1.0',), (1.0, None), tuple(map(str, range(4)))):
|
|
with self.assertRaises(TypeError):
|
|
Country.objects.annotate(snap=functions.SnapToGrid('mpoly', *bad_args))
|
|
|
|
# Boundary for San Marino, courtesy of Bjorn Sandvik of thematicmapping.org
|
|
# from the world borders dataset he provides.
|
|
wkt = ('MULTIPOLYGON(((12.41580 43.95795,12.45055 43.97972,12.45389 43.98167,'
|
|
'12.46250 43.98472,12.47167 43.98694,12.49278 43.98917,'
|
|
'12.50555 43.98861,12.51000 43.98694,12.51028 43.98277,'
|
|
'12.51167 43.94333,12.51056 43.93916,12.49639 43.92333,'
|
|
'12.49500 43.91472,12.48778 43.90583,12.47444 43.89722,'
|
|
'12.46472 43.89555,12.45917 43.89611,12.41639 43.90472,'
|
|
'12.41222 43.90610,12.40782 43.91366,12.40389 43.92667,'
|
|
'12.40500 43.94833,12.40889 43.95499,12.41580 43.95795)))')
|
|
Country.objects.create(name='San Marino', mpoly=fromstr(wkt))
|
|
|
|
# Because floating-point arithmetic isn't exact, we set a tolerance
|
|
# to pass into GEOS `equals_exact`.
|
|
tol = 0.000000001
|
|
|
|
# SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.1)) FROM "geoapp_country"
|
|
# WHERE "geoapp_country"."name" = 'San Marino';
|
|
ref = fromstr('MULTIPOLYGON(((12.4 44,12.5 44,12.5 43.9,12.4 43.9,12.4 44)))')
|
|
self.assertTrue(
|
|
ref.equals_exact(
|
|
Country.objects.annotate(
|
|
snap=functions.SnapToGrid('mpoly', 0.1)
|
|
).get(name='San Marino').snap,
|
|
tol
|
|
)
|
|
)
|
|
|
|
# SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.05, 0.23)) FROM "geoapp_country"
|
|
# WHERE "geoapp_country"."name" = 'San Marino';
|
|
ref = fromstr('MULTIPOLYGON(((12.4 43.93,12.45 43.93,12.5 43.93,12.45 43.93,12.4 43.93)))')
|
|
self.assertTrue(
|
|
ref.equals_exact(
|
|
Country.objects.annotate(
|
|
snap=functions.SnapToGrid('mpoly', 0.05, 0.23)
|
|
).get(name='San Marino').snap,
|
|
tol
|
|
)
|
|
)
|
|
|
|
# SELECT AsText(ST_SnapToGrid("geoapp_country"."mpoly", 0.5, 0.17, 0.05, 0.23)) FROM "geoapp_country"
|
|
# WHERE "geoapp_country"."name" = 'San Marino';
|
|
ref = fromstr(
|
|
'MULTIPOLYGON(((12.4 43.87,12.45 43.87,12.45 44.1,12.5 44.1,12.5 43.87,12.45 43.87,12.4 43.87)))'
|
|
)
|
|
self.assertTrue(
|
|
ref.equals_exact(
|
|
Country.objects.annotate(
|
|
snap=functions.SnapToGrid('mpoly', 0.05, 0.23, 0.5, 0.17)
|
|
).get(name='San Marino').snap,
|
|
tol
|
|
)
|
|
)
|
|
|
|
@skipUnlessDBFeature("has_SymDifference_function")
|
|
def test_sym_difference(self):
|
|
geom = Point(5, 23, srid=4326)
|
|
qs = Country.objects.annotate(sym_difference=functions.SymDifference('mpoly', geom))
|
|
# Oracle does something screwy with the Texas geometry.
|
|
if oracle:
|
|
qs = qs.exclude(name='Texas')
|
|
for country in qs:
|
|
self.assertTrue(country.mpoly.sym_difference(geom).equals(country.sym_difference))
|
|
|
|
@skipUnlessDBFeature("has_Transform_function")
|
|
def test_transform(self):
|
|
# Pre-transformed points for Houston and Pueblo.
|
|
ptown = fromstr('POINT(992363.390841912 481455.395105533)', srid=2774)
|
|
prec = 3 # Precision is low due to version variations in PROJ and GDAL.
|
|
|
|
# Asserting the result of the transform operation with the values in
|
|
# the pre-transformed points.
|
|
h = City.objects.annotate(pt=functions.Transform('point', ptown.srid)).get(name='Pueblo')
|
|
self.assertEqual(2774, h.pt.srid)
|
|
self.assertAlmostEqual(ptown.x, h.pt.x, prec)
|
|
self.assertAlmostEqual(ptown.y, h.pt.y, prec)
|
|
|
|
@skipUnlessDBFeature("has_Translate_function")
|
|
def test_translate(self):
|
|
xfac, yfac = 5, -23
|
|
qs = Country.objects.annotate(translated=functions.Translate('mpoly', xfac, yfac))
|
|
for c in qs:
|
|
for p1, p2 in zip(c.mpoly, c.translated):
|
|
for r1, r2 in zip(p1, p2):
|
|
for c1, c2 in zip(r1.coords, r2.coords):
|
|
# The low precision is for SpatiaLite
|
|
self.assertAlmostEqual(c1[0] + xfac, c2[0], 5)
|
|
self.assertAlmostEqual(c1[1] + yfac, c2[1], 5)
|
|
|
|
# Some combined function tests
|
|
@skipUnlessDBFeature(
|
|
"has_Difference_function", "has_Intersection_function",
|
|
"has_SymDifference_function", "has_Union_function")
|
|
def test_diff_intersection_union(self):
|
|
geom = Point(5, 23, srid=4326)
|
|
qs = Country.objects.all().annotate(
|
|
difference=functions.Difference('mpoly', geom),
|
|
sym_difference=functions.SymDifference('mpoly', geom),
|
|
union=functions.Union('mpoly', geom),
|
|
intersection=functions.Intersection('mpoly', geom),
|
|
)
|
|
|
|
if oracle:
|
|
# Should be able to execute the queries; however, they won't be the same
|
|
# as GEOS (because Oracle doesn't use GEOS internally like PostGIS or
|
|
# SpatiaLite).
|
|
return
|
|
for c in qs:
|
|
self.assertTrue(c.mpoly.difference(geom).equals(c.difference))
|
|
if not (spatialite or mysql):
|
|
self.assertEqual(c.mpoly.intersection(geom), c.intersection)
|
|
self.assertTrue(c.mpoly.sym_difference(geom).equals(c.sym_difference))
|
|
self.assertTrue(c.mpoly.union(geom).equals(c.union))
|
|
|
|
@skipUnlessDBFeature("has_Union_function")
|
|
def test_union(self):
|
|
"""Union with all combinations of geometries/geometry fields."""
|
|
geom = Point(-95.363151, 29.763374, srid=4326)
|
|
|
|
union = City.objects.annotate(union=functions.Union('point', geom)).get(name='Dallas').union
|
|
expected = fromstr('MULTIPOINT(-96.801611 32.782057,-95.363151 29.763374)', srid=4326)
|
|
self.assertTrue(expected.equals(union))
|
|
|
|
union = City.objects.annotate(union=functions.Union(geom, 'point')).get(name='Dallas').union
|
|
self.assertTrue(expected.equals(union))
|
|
|
|
union = City.objects.annotate(union=functions.Union('point', 'point')).get(name='Dallas').union
|
|
expected = GEOSGeometry('POINT(-96.801611 32.782057)', srid=4326)
|
|
self.assertTrue(expected.equals(union))
|
|
|
|
union = City.objects.annotate(union=functions.Union(geom, geom)).get(name='Dallas').union
|
|
self.assertTrue(geom.equals(union))
|
|
|
|
@skipUnlessDBFeature("has_Union_function", "has_Transform_function")
|
|
def test_union_mixed_srid(self):
|
|
"""The result SRID depends on the order of parameters."""
|
|
geom = Point(61.42915, 55.15402, srid=4326)
|
|
geom_3857 = geom.transform(3857, clone=True)
|
|
tol = 0.001
|
|
|
|
for city in City.objects.annotate(union=functions.Union('point', geom_3857)):
|
|
expected = city.point | geom
|
|
self.assertTrue(city.union.equals_exact(expected, tol))
|
|
self.assertEqual(city.union.srid, 4326)
|
|
|
|
for city in City.objects.annotate(union=functions.Union(geom_3857, 'point')):
|
|
expected = geom_3857 | city.point.transform(3857, clone=True)
|
|
self.assertTrue(expected.equals_exact(city.union, tol))
|
|
self.assertEqual(city.union.srid, 3857)
|
|
|
|
def test_argument_validation(self):
|
|
with self.assertRaisesMessage(ValueError, 'SRID is required for all geometries.'):
|
|
City.objects.annotate(geo=functions.GeoFunc(Point(1, 1)))
|
|
|
|
msg = 'GeoFunc function requires a GeometryField in position 1, got CharField.'
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
City.objects.annotate(geo=functions.GeoFunc('name'))
|
|
|
|
msg = 'GeoFunc function requires a geometric argument in position 1.'
|
|
with self.assertRaisesMessage(TypeError, msg):
|
|
City.objects.annotate(union=functions.GeoFunc(1, 'point')).get(name='Dallas')
|