492 lines
23 KiB
Python
492 lines
23 KiB
Python
from __future__ import unicode_literals
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import re
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from decimal import Decimal
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from django.contrib.gis.db.models import functions
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from django.contrib.gis.geos import LineString, Point, Polygon, fromstr
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from django.contrib.gis.measure import Area
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from django.db import connection
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from django.db.models import Sum
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from django.test import TestCase, skipUnlessDBFeature
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from django.utils import six
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from ..utils import mysql, oracle, postgis, spatialite
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from .models import City, Country, CountryWebMercator, State, Track
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@skipUnlessDBFeature("gis_enabled")
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class GISFunctionsTests(TestCase):
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"""
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Testing functions from django/contrib/gis/db/models/functions.py.
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Several tests are taken and adapted from GeoQuerySetTest.
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Area/Distance/Length/Perimeter are tested in distapp/tests.
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Please keep the tests in function's alphabetic order.
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"""
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fixtures = ['initial']
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def test_asgeojson(self):
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# Only PostGIS and SpatiaLite support GeoJSON.
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if not connection.ops.geojson:
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with self.assertRaises(NotImplementedError):
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list(Country.objects.annotate(json=functions.AsGeoJSON('mpoly')))
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return
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pueblo_json = '{"type":"Point","coordinates":[-104.609252,38.255001]}'
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houston_json = (
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'{"type":"Point","crs":{"type":"name","properties":'
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'{"name":"EPSG:4326"}},"coordinates":[-95.363151,29.763374]}'
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)
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victoria_json = (
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'{"type":"Point","bbox":[-123.30519600,48.46261100,-123.30519600,48.46261100],'
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'"coordinates":[-123.305196,48.462611]}'
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)
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chicago_json = (
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'{"type":"Point","crs":{"type":"name","properties":{"name":"EPSG:4326"}},'
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'"bbox":[-87.65018,41.85039,-87.65018,41.85039],"coordinates":[-87.65018,41.85039]}'
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)
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# Precision argument should only be an integer
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with self.assertRaises(TypeError):
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City.objects.annotate(geojson=functions.AsGeoJSON('point', precision='foo'))
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# Reference queries and values.
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# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 0)
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# FROM "geoapp_city" WHERE "geoapp_city"."name" = 'Pueblo';
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self.assertJSONEqual(
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pueblo_json,
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City.objects.annotate(geojson=functions.AsGeoJSON('point')).get(name='Pueblo').geojson
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)
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# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 2) FROM "geoapp_city"
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# WHERE "geoapp_city"."name" = 'Houston';
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# This time we want to include the CRS by using the `crs` keyword.
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self.assertJSONEqual(
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houston_json,
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City.objects.annotate(json=functions.AsGeoJSON('point', crs=True)).get(name='Houston').json
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)
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# SELECT ST_AsGeoJson("geoapp_city"."point", 8, 1) FROM "geoapp_city"
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# WHERE "geoapp_city"."name" = 'Houston';
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# This time we include the bounding box by using the `bbox` keyword.
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self.assertJSONEqual(
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victoria_json,
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City.objects.annotate(
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geojson=functions.AsGeoJSON('point', bbox=True)
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).get(name='Victoria').geojson
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)
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# SELECT ST_AsGeoJson("geoapp_city"."point", 5, 3) FROM "geoapp_city"
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# WHERE "geoapp_city"."name" = 'Chicago';
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# Finally, we set every available keyword.
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self.assertJSONEqual(
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chicago_json,
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City.objects.annotate(
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geojson=functions.AsGeoJSON('point', bbox=True, crs=True, precision=5)
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).get(name='Chicago').geojson
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)
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@skipUnlessDBFeature("has_AsGML_function")
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def test_asgml(self):
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# Should throw a TypeError when trying to obtain GML from a
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# non-geometry field.
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qs = City.objects.all()
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with self.assertRaises(TypeError):
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qs.annotate(gml=functions.AsGML('name'))
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ptown = City.objects.annotate(gml=functions.AsGML('point', precision=9)).get(name='Pueblo')
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if oracle:
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# No precision parameter for Oracle :-/
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gml_regex = re.compile(
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r'^<gml:Point srsName="EPSG:4326" xmlns:gml="http://www.opengis.net/gml">'
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r'<gml:coordinates decimal="\." cs="," ts=" ">-104.60925\d+,38.25500\d+ '
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r'</gml:coordinates></gml:Point>'
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)
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else:
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gml_regex = re.compile(
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r'^<gml:Point srsName="EPSG:4326"><gml:coordinates>'
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r'-104\.60925\d+,38\.255001</gml:coordinates></gml:Point>'
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)
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self.assertTrue(gml_regex.match(ptown.gml))
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self.assertIn(
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'<gml:pos srsDimension="2">',
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City.objects.annotate(gml=functions.AsGML('point', version=3)).get(name='Pueblo').gml
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)
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@skipUnlessDBFeature("has_AsKML_function")
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def test_askml(self):
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# Should throw a TypeError when trying to obtain KML from a
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# non-geometry field.
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with self.assertRaises(TypeError):
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City.objects.annotate(kml=functions.AsKML('name'))
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# Ensuring the KML is as expected.
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ptown = City.objects.annotate(kml=functions.AsKML('point', precision=9)).get(name='Pueblo')
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self.assertEqual('<Point><coordinates>-104.609252,38.255001</coordinates></Point>', ptown.kml)
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@skipUnlessDBFeature("has_AsSVG_function")
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def test_assvg(self):
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with self.assertRaises(TypeError):
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City.objects.annotate(svg=functions.AsSVG('point', precision='foo'))
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# SELECT AsSVG(geoapp_city.point, 0, 8) FROM geoapp_city WHERE name = 'Pueblo';
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svg1 = 'cx="-104.609252" cy="-38.255001"'
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# Even though relative, only one point so it's practically the same except for
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# the 'c' letter prefix on the x,y values.
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svg2 = svg1.replace('c', '')
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self.assertEqual(svg1, City.objects.annotate(svg=functions.AsSVG('point')).get(name='Pueblo').svg)
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self.assertEqual(svg2, City.objects.annotate(svg=functions.AsSVG('point', relative=5)).get(name='Pueblo').svg)
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@skipUnlessDBFeature("has_BoundingCircle_function")
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def test_bounding_circle(self):
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def circle_num_points(num_seg):
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# num_seg is the number of segments per quarter circle.
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return (4 * num_seg) + 1
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expected_areas = (169, 136) if postgis else (171, 126)
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qs = Country.objects.annotate(circle=functions.BoundingCircle('mpoly')).order_by('name')
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self.assertAlmostEqual(qs[0].circle.area, expected_areas[0], 0)
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self.assertAlmostEqual(qs[1].circle.area, expected_areas[1], 0)
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if postgis:
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# By default num_seg=48.
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self.assertEqual(qs[0].circle.num_points, circle_num_points(48))
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self.assertEqual(qs[1].circle.num_points, circle_num_points(48))
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qs = Country.objects.annotate(circle=functions.BoundingCircle('mpoly', num_seg=12)).order_by('name')
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if postgis:
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self.assertGreater(qs[0].circle.area, 168.4, 0)
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self.assertLess(qs[0].circle.area, 169.5, 0)
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self.assertAlmostEqual(qs[1].circle.area, 136, 0)
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self.assertEqual(qs[0].circle.num_points, circle_num_points(12))
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self.assertEqual(qs[1].circle.num_points, circle_num_points(12))
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else:
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self.assertAlmostEqual(qs[0].circle.area, expected_areas[0], 0)
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self.assertAlmostEqual(qs[1].circle.area, expected_areas[1], 0)
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@skipUnlessDBFeature("has_Centroid_function")
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def test_centroid(self):
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qs = State.objects.exclude(poly__isnull=True).annotate(centroid=functions.Centroid('poly'))
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tol = 1.8 if mysql else (0.1 if oracle else 0.00001)
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for state in qs:
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self.assertTrue(state.poly.centroid.equals_exact(state.centroid, tol))
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with self.assertRaisesMessage(TypeError, "'Centroid' takes exactly 1 argument (2 given)"):
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State.objects.annotate(centroid=functions.Centroid('poly', 'poly'))
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@skipUnlessDBFeature("has_Difference_function")
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def test_difference(self):
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geom = Point(5, 23, srid=4326)
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qs = Country.objects.annotate(diff=functions.Difference('mpoly', geom))
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# Oracle does something screwy with the Texas geometry.
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if oracle:
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qs = qs.exclude(name='Texas')
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for c in qs:
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self.assertTrue(c.mpoly.difference(geom).equals(c.diff))
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@skipUnlessDBFeature("has_Difference_function", "has_Transform_function")
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def test_difference_mixed_srid(self):
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"""Testing with mixed SRID (Country has default 4326)."""
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geom = Point(556597.4, 2632018.6, srid=3857) # Spherical mercator
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qs = Country.objects.annotate(difference=functions.Difference('mpoly', geom))
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# Oracle does something screwy with the Texas geometry.
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if oracle:
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qs = qs.exclude(name='Texas')
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for c in qs:
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self.assertTrue(c.mpoly.difference(geom).equals(c.difference))
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@skipUnlessDBFeature("has_Envelope_function")
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def test_envelope(self):
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countries = Country.objects.annotate(envelope=functions.Envelope('mpoly'))
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for country in countries:
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self.assertIsInstance(country.envelope, Polygon)
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@skipUnlessDBFeature("has_ForceRHR_function")
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def test_force_rhr(self):
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rings = (
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((0, 0), (5, 0), (0, 5), (0, 0)),
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((1, 1), (1, 3), (3, 1), (1, 1)),
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)
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rhr_rings = (
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((0, 0), (0, 5), (5, 0), (0, 0)),
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((1, 1), (3, 1), (1, 3), (1, 1)),
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)
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State.objects.create(name='Foo', poly=Polygon(*rings))
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st = State.objects.annotate(force_rhr=functions.ForceRHR('poly')).get(name='Foo')
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self.assertEqual(rhr_rings, st.force_rhr.coords)
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@skipUnlessDBFeature("has_GeoHash_function")
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def test_geohash(self):
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# Reference query:
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# SELECT ST_GeoHash(point) FROM geoapp_city WHERE name='Houston';
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# SELECT ST_GeoHash(point, 5) FROM geoapp_city WHERE name='Houston';
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ref_hash = '9vk1mfq8jx0c8e0386z6'
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h1 = City.objects.annotate(geohash=functions.GeoHash('point')).get(name='Houston')
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h2 = City.objects.annotate(geohash=functions.GeoHash('point', precision=5)).get(name='Houston')
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self.assertEqual(ref_hash, h1.geohash)
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self.assertEqual(ref_hash[:5], h2.geohash)
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@skipUnlessDBFeature("has_Intersection_function")
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def test_intersection(self):
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geom = Point(5, 23, srid=4326)
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qs = Country.objects.annotate(inter=functions.Intersection('mpoly', geom))
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for c in qs:
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if spatialite or (mysql and not connection.ops.uses_invalid_empty_geometry_collection) or oracle:
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# When the intersection is empty, some databases return None.
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expected = None
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else:
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expected = c.mpoly.intersection(geom)
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self.assertEqual(c.inter, expected)
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@skipUnlessDBFeature("has_IsValid_function")
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def test_isvalid(self):
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valid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))')
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invalid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 1 1, 1 0, 0 0))')
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State.objects.create(name='valid', poly=valid_geom)
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State.objects.create(name='invalid', poly=invalid_geom)
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valid = State.objects.filter(name='valid').annotate(isvalid=functions.IsValid('poly')).first()
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invalid = State.objects.filter(name='invalid').annotate(isvalid=functions.IsValid('poly')).first()
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self.assertIs(valid.isvalid, True)
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self.assertIs(invalid.isvalid, False)
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@skipUnlessDBFeature("has_Area_function")
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def test_area_with_regular_aggregate(self):
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# Create projected country objects, for this test to work on all backends.
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for c in Country.objects.all():
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CountryWebMercator.objects.create(name=c.name, mpoly=c.mpoly)
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# Test in projected coordinate system
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qs = CountryWebMercator.objects.annotate(area_sum=Sum(functions.Area('mpoly')))
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# Some backends (e.g. Oracle) cannot group by multipolygon values, so
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# defer such fields in the aggregation query.
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for c in qs.defer('mpoly'):
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result = c.area_sum
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# If the result is a measure object, get value.
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if isinstance(result, Area):
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result = result.sq_m
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self.assertAlmostEqual((result - c.mpoly.area) / c.mpoly.area, 0)
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@skipUnlessDBFeature("has_MakeValid_function")
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def test_make_valid(self):
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invalid_geom = fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 1 1, 1 0, 0 0))')
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State.objects.create(name='invalid', poly=invalid_geom)
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invalid = State.objects.filter(name='invalid').annotate(repaired=functions.MakeValid('poly')).first()
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self.assertIs(invalid.repaired.valid, True)
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self.assertEqual(invalid.repaired, fromstr('POLYGON((0 0, 0 1, 1 1, 1 0, 0 0))', srid=invalid.poly.srid))
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@skipUnlessDBFeature("has_MemSize_function")
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def test_memsize(self):
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ptown = City.objects.annotate(size=functions.MemSize('point')).get(name='Pueblo')
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self.assertTrue(20 <= ptown.size <= 40) # Exact value may depend on PostGIS version
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@skipUnlessDBFeature("has_NumGeom_function")
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def test_num_geom(self):
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# Both 'countries' only have two geometries.
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for c in Country.objects.annotate(num_geom=functions.NumGeometries('mpoly')):
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self.assertEqual(2, c.num_geom)
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qs = City.objects.filter(point__isnull=False).annotate(num_geom=functions.NumGeometries('point'))
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for city in qs:
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# Oracle and PostGIS return 1 for the number of geometries on
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# non-collections, whereas MySQL returns None.
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if mysql:
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self.assertIsNone(city.num_geom)
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else:
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self.assertEqual(1, city.num_geom)
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@skipUnlessDBFeature("has_NumPoint_function")
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def test_num_points(self):
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coords = [(-95.363151, 29.763374), (-95.448601, 29.713803)]
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Track.objects.create(name='Foo', line=LineString(coords))
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qs = Track.objects.annotate(num_points=functions.NumPoints('line'))
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self.assertEqual(qs.first().num_points, 2)
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mpoly_qs = Country.objects.annotate(num_points=functions.NumPoints('mpoly'))
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if not connection.features.supports_num_points_poly:
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msg = 'NumPoints can only operate on LineString content on this database.'
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with self.assertRaisesMessage(TypeError, msg):
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list(mpoly_qs)
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return
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for c in mpoly_qs:
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self.assertEqual(c.mpoly.num_points, c.num_points)
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if not oracle:
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# Oracle cannot count vertices in Point geometries.
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for c in City.objects.annotate(num_points=functions.NumPoints('point')):
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self.assertEqual(1, c.num_points)
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@skipUnlessDBFeature("has_PointOnSurface_function")
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def test_point_on_surface(self):
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# Reference values.
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if oracle:
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# SELECT SDO_UTIL.TO_WKTGEOMETRY(SDO_GEOM.SDO_POINTONSURFACE(GEOAPP_COUNTRY.MPOLY, 0.05))
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# FROM GEOAPP_COUNTRY;
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ref = {'New Zealand': fromstr('POINT (174.616364 -36.100861)', srid=4326),
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'Texas': fromstr('POINT (-103.002434 36.500397)', srid=4326),
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}
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else:
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# Using GEOSGeometry to compute the reference point on surface values
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# -- since PostGIS also uses GEOS these should be the same.
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ref = {'New Zealand': Country.objects.get(name='New Zealand').mpoly.point_on_surface,
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'Texas': Country.objects.get(name='Texas').mpoly.point_on_surface
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}
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qs = Country.objects.annotate(point_on_surface=functions.PointOnSurface('mpoly'))
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for country in qs:
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tol = 0.00001 # SpatiaLite might have WKT-translation-related precision issues
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self.assertTrue(ref[country.name].equals_exact(country.point_on_surface, tol))
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@skipUnlessDBFeature("has_Reverse_function")
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def test_reverse_geom(self):
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coords = [(-95.363151, 29.763374), (-95.448601, 29.713803)]
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Track.objects.create(name='Foo', line=LineString(coords))
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track = Track.objects.annotate(reverse_geom=functions.Reverse('line')).get(name='Foo')
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coords.reverse()
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self.assertEqual(tuple(coords), track.reverse_geom.coords)
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@skipUnlessDBFeature("has_Scale_function")
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def test_scale(self):
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xfac, yfac = 2, 3
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tol = 5 # The low precision tolerance is for SpatiaLite
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qs = Country.objects.annotate(scaled=functions.Scale('mpoly', xfac, yfac))
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for country in qs:
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for p1, p2 in zip(country.mpoly, country.scaled):
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for r1, r2 in zip(p1, p2):
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for c1, c2 in zip(r1.coords, r2.coords):
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self.assertAlmostEqual(c1[0] * xfac, c2[0], tol)
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self.assertAlmostEqual(c1[1] * yfac, c2[1], tol)
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# Test float/Decimal values
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qs = Country.objects.annotate(scaled=functions.Scale('mpoly', 1.5, Decimal('2.5')))
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self.assertGreater(qs[0].scaled.area, qs[0].mpoly.area)
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@skipUnlessDBFeature("has_SnapToGrid_function")
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def test_snap_to_grid(self):
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# Let's try and break snap_to_grid() with bad combinations of arguments.
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for bad_args in ((), range(3), range(5)):
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with self.assertRaises(ValueError):
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Country.objects.annotate(snap=functions.SnapToGrid('mpoly', *bad_args))
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for bad_args in (('1.0',), (1.0, None), tuple(map(six.text_type, range(4)))):
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with self.assertRaises(TypeError):
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Country.objects.annotate(snap=functions.SnapToGrid('mpoly', *bad_args))
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# Boundary for San Marino, courtesy of Bjorn Sandvik of thematicmapping.org
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# from the world borders dataset he provides.
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wkt = ('MULTIPOLYGON(((12.41580 43.95795,12.45055 43.97972,12.45389 43.98167,'
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'12.46250 43.98472,12.47167 43.98694,12.49278 43.98917,'
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'12.50555 43.98861,12.51000 43.98694,12.51028 43.98277,'
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'12.51167 43.94333,12.51056 43.93916,12.49639 43.92333,'
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'12.49500 43.91472,12.48778 43.90583,12.47444 43.89722,'
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'12.46472 43.89555,12.45917 43.89611,12.41639 43.90472,'
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'12.41222 43.90610,12.40782 43.91366,12.40389 43.92667,'
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'12.40500 43.94833,12.40889 43.95499,12.41580 43.95795)))')
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Country.objects.create(name='San Marino', mpoly=fromstr(wkt))
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# Because floating-point arithmetic isn't exact, we set a tolerance
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# to pass into GEOS `equals_exact`.
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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):
|
|
"Testing the `difference`, `intersection`, `sym_difference`, and `union` GeoQuerySet methods."
|
|
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):
|
|
geom = Point(-95.363151, 29.763374, srid=4326)
|
|
ptown = City.objects.annotate(union=functions.Union('point', geom)).get(name='Dallas')
|
|
expected = fromstr('MULTIPOINT(-96.801611 32.782057,-95.363151 29.763374)', srid=4326)
|
|
self.assertTrue(expected.equals(ptown.union))
|