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test_qgsgeometry.py
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test_qgsgeometry.py
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# -*- coding: utf-8 -*-
"""QGIS Unit tests for QgsGeometry.
.. note:: This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
"""
__author__ = 'Tim Sutton'
__date__ = '20/08/2012'
__copyright__ = 'Copyright 2012, The QGIS Project'
# This will get replaced with a git SHA1 when you do a git archive
__revision__ = '$Format:%H$'
import os
import csv
import math
from qgis.core import (
QgsGeometry,
QgsVectorLayer,
QgsFeature,
QgsPointXY,
QgsPoint,
QgsCircularString,
QgsCompoundCurve,
QgsCurvePolygon,
QgsGeometryCollection,
QgsLineString,
QgsMultiCurve,
QgsMultiLineString,
QgsMultiPoint,
QgsMultiPolygon,
QgsMultiSurface,
QgsPolygon,
QgsCoordinateTransform,
QgsRectangle,
QgsWkbTypes,
QgsRenderChecker,
QgsCoordinateReferenceSystem,
QgsProject
)
from qgis.PyQt.QtCore import QDir
from qgis.PyQt.QtGui import QImage, QPainter, QPen, QColor, QBrush, QPainterPath
from qgis.testing import (
start_app,
unittest,
)
from utilities import (
compareWkt,
unitTestDataPath,
writeShape
)
# Convenience instances in case you may need them not used in this test
start_app()
TEST_DATA_DIR = unitTestDataPath()
class TestQgsGeometry(unittest.TestCase):
def setUp(self):
self.report = "<h1>Python QgsGeometry Tests</h1>\n"
def testBool(self):
""" Test boolean evaluation of QgsGeometry """
g = QgsGeometry()
self.assertFalse(g)
myWKT = 'Point (10 10)'
g = QgsGeometry.fromWkt(myWKT)
self.assertTrue(g)
g.set(None)
self.assertFalse(g)
def testIsEmpty(self):
"""
the bulk of these tests are in testqgsgeometry.cpp for each QgsAbstractGeometry subclass
this test just checks the QgsGeometry wrapper
"""
g = QgsGeometry()
self.assertTrue(g.isEmpty())
g = QgsGeometry.fromWkt('Point(10 10 )')
self.assertFalse(g.isEmpty())
g = QgsGeometry.fromWkt('MultiPoint ()')
self.assertTrue(g.isEmpty())
def testVertexIterator(self):
g = QgsGeometry.fromWkt('Linestring(11 12, 13 14)')
it = g.vertices()
self.assertEqual(next(it), QgsPoint(11, 12))
self.assertEqual(next(it), QgsPoint(13, 14))
with self.assertRaises(StopIteration):
next(it)
def testPartIterator(self):
g = QgsGeometry()
it = g.parts()
with self.assertRaises(StopIteration):
next(it)
with self.assertRaises(StopIteration):
next(it)
# single point geometry
g = QgsGeometry.fromWkt('Point (10 10)')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'Point (10 10)')
with self.assertRaises(StopIteration):
next(it)
it = g.get().parts()
self.assertEqual(next(it).asWkt(), 'Point (10 10)')
with self.assertRaises(StopIteration):
next(it)
# multi point geometry
g = QgsGeometry.fromWkt('MultiPoint (10 10, 20 20, 10 20)')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'Point (10 10)')
self.assertEqual(next(it).asWkt(), 'Point (20 20)')
self.assertEqual(next(it).asWkt(), 'Point (10 20)')
with self.assertRaises(StopIteration):
next(it)
it = g.get().parts()
self.assertEqual(next(it).asWkt(), 'Point (10 10)')
self.assertEqual(next(it).asWkt(), 'Point (20 20)')
self.assertEqual(next(it).asWkt(), 'Point (10 20)')
with self.assertRaises(StopIteration):
next(it)
# empty multi point geometry
g = QgsGeometry.fromWkt('MultiPoint ()')
it = g.parts()
with self.assertRaises(StopIteration):
next(it)
# single line geometry
g = QgsGeometry.fromWkt('LineString (10 10, 20 10, 30 10)')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'LineString (10 10, 20 10, 30 10)')
with self.assertRaises(StopIteration):
next(it)
# multi line geometry
g = QgsGeometry.fromWkt('MultiLineString ((10 10, 20 20, 10 20),(5 7, 8 9))')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'LineString (10 10, 20 20, 10 20)')
self.assertEqual(next(it).asWkt(), 'LineString (5 7, 8 9)')
with self.assertRaises(StopIteration):
next(it)
# empty multi line geometry
g = QgsGeometry.fromWkt('MultiLineString ()')
it = g.parts()
with self.assertRaises(StopIteration):
next(it)
# single polygon geometry
g = QgsGeometry.fromWkt('Polygon ((10 10, 100 10, 100 100, 10 100, 10 10),(50 50, 55 50, 55 55, 50 55, 50 50))')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'Polygon ((10 10, 100 10, 100 100, 10 100, 10 10),(50 50, 55 50, 55 55, 50 55, 50 50))')
with self.assertRaises(StopIteration):
next(it)
# multi polygon geometry
g = QgsGeometry.fromWkt('MultiPolygon (((10 10, 100 10, 100 100, 10 100, 10 10),(50 50, 55 50, 55 55, 50 55, 50 50)),((20 2, 20 4, 22 4, 22 2, 20 2)))')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'Polygon ((10 10, 100 10, 100 100, 10 100, 10 10),(50 50, 55 50, 55 55, 50 55, 50 50))')
self.assertEqual(next(it).asWkt(), 'Polygon ((20 2, 20 4, 22 4, 22 2, 20 2))')
with self.assertRaises(StopIteration):
next(it)
# empty multi polygon geometry
g = QgsGeometry.fromWkt('MultiPolygon ()')
it = g.parts()
with self.assertRaises(StopIteration):
next(it)
# geometry collection
g = QgsGeometry.fromWkt('GeometryCollection( Point( 1 2), LineString( 4 5, 8 7 ))')
it = g.parts()
self.assertEqual(next(it).asWkt(), 'Point (1 2)')
self.assertEqual(next(it).asWkt(), 'LineString (4 5, 8 7)')
with self.assertRaises(StopIteration):
next(it)
# empty geometry collection
g = QgsGeometry.fromWkt('GeometryCollection()')
it = g.parts()
with self.assertRaises(StopIteration):
next(it)
def testWktPointLoading(self):
myWKT = 'Point (10 10)'
myGeometry = QgsGeometry.fromWkt(myWKT)
self.assertEqual(myGeometry.wkbType(), QgsWkbTypes.Point)
def testWktMultiPointLoading(self):
# Standard format
wkt = 'MultiPoint ((10 15),(20 30))'
geom = QgsGeometry.fromWkt(wkt)
self.assertEqual(geom.wkbType(), QgsWkbTypes.MultiPoint, ('Expected:\n%s\nGot:\n%s\n' % (QgsWkbTypes.Point, geom.type())))
self.assertEqual(geom.constGet().numGeometries(), 2)
self.assertEqual(geom.constGet().geometryN(0).x(), 10)
self.assertEqual(geom.constGet().geometryN(0).y(), 15)
self.assertEqual(geom.constGet().geometryN(1).x(), 20)
self.assertEqual(geom.constGet().geometryN(1).y(), 30)
# Check MS SQL format
wkt = 'MultiPoint (11 16, 21 31)'
geom = QgsGeometry.fromWkt(wkt)
self.assertEqual(geom.wkbType(), QgsWkbTypes.MultiPoint, ('Expected:\n%s\nGot:\n%s\n' % (QgsWkbTypes.Point, geom.type())))
self.assertEqual(geom.constGet().numGeometries(), 2)
self.assertEqual(geom.constGet().geometryN(0).x(), 11)
self.assertEqual(geom.constGet().geometryN(0).y(), 16)
self.assertEqual(geom.constGet().geometryN(1).x(), 21)
self.assertEqual(geom.constGet().geometryN(1).y(), 31)
def testFromPoint(self):
myPoint = QgsGeometry.fromPointXY(QgsPointXY(10, 10))
self.assertEqual(myPoint.wkbType(), QgsWkbTypes.Point)
def testFromMultiPoint(self):
myMultiPoint = QgsGeometry.fromMultiPointXY([
(QgsPointXY(0, 0)), (QgsPointXY(1, 1))])
self.assertEqual(myMultiPoint.wkbType(), QgsWkbTypes.MultiPoint)
def testFromLine(self):
myLine = QgsGeometry.fromPolylineXY([QgsPointXY(1, 1), QgsPointXY(2, 2)])
self.assertEqual(myLine.wkbType(), QgsWkbTypes.LineString)
def testFromMultiLine(self):
myMultiPolyline = QgsGeometry.fromMultiPolylineXY(
[[QgsPointXY(0, 0), QgsPointXY(1, 1)], [QgsPointXY(0, 1), QgsPointXY(2, 1)]])
self.assertEqual(myMultiPolyline.wkbType(), QgsWkbTypes.MultiLineString)
def testFromPolygon(self):
myPolygon = QgsGeometry.fromPolygonXY(
[[QgsPointXY(1, 1), QgsPointXY(2, 2), QgsPointXY(1, 2), QgsPointXY(1, 1)]])
self.assertEqual(myPolygon.wkbType(), QgsWkbTypes.Polygon)
def testFromMultiPolygon(self):
myMultiPolygon = QgsGeometry.fromMultiPolygonXY([
[[QgsPointXY(1, 1),
QgsPointXY(2, 2),
QgsPointXY(1, 2),
QgsPointXY(1, 1)]],
[[QgsPointXY(2, 2),
QgsPointXY(3, 3),
QgsPointXY(3, 1),
QgsPointXY(2, 2)]]
])
self.assertEqual(myMultiPolygon.wkbType(), QgsWkbTypes.MultiPolygon)
def testPointXY(self):
"""
Test the QgsPointXY conversion methods
"""
self.assertEqual(QgsGeometry.fromWkt('Point(11 13)').asPoint(), QgsPointXY(11, 13))
self.assertEqual(QgsGeometry.fromWkt('PointZ(11 13 14)').asPoint(), QgsPointXY(11, 13))
self.assertEqual(QgsGeometry.fromWkt('PointM(11 13 14)').asPoint(), QgsPointXY(11, 13))
self.assertEqual(QgsGeometry.fromWkt('PointZM(11 13 14 15)').asPoint(), QgsPointXY(11, 13))
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('MultiPoint(11 13,14 15)').asPoint()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('LineString(11 13,14 15)').asPoint()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('Polygon((11 13,14 15, 14 13, 11 13))').asPoint()
with self.assertRaises(ValueError):
QgsGeometry().asPoint()
# as polyline
self.assertEqual(QgsGeometry.fromWkt('LineString(11 13,14 15)').asPolyline(), [QgsPointXY(11, 13), QgsPointXY(14, 15)])
self.assertEqual(QgsGeometry.fromWkt('LineStringZ(11 13 1,14 15 2)').asPolyline(), [QgsPointXY(11, 13), QgsPointXY(14, 15)])
self.assertEqual(QgsGeometry.fromWkt('LineStringM(11 13 1,14 15 2)').asPolyline(), [QgsPointXY(11, 13), QgsPointXY(14, 15)])
self.assertEqual(QgsGeometry.fromWkt('LineStringZM(11 13 1 2,14 15 3 4)').asPolyline(), [QgsPointXY(11, 13), QgsPointXY(14, 15)])
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('Point(11 13)').asPolyline()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('MultiPoint(11 13,14 15)').asPolyline()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('MultiLineString((11 13, 14 15),(1 2, 3 4))').asPolyline()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('Polygon((11 13,14 15, 14 13, 11 13))').asPolyline()
with self.assertRaises(ValueError):
QgsGeometry().asPolyline()
# as polygon
self.assertEqual(QgsGeometry.fromWkt('Polygon((11 13,14 15, 11 15, 11 13))').asPolygon(),
[[QgsPointXY(11, 13), QgsPointXY(14, 15), QgsPointXY(11, 15), QgsPointXY(11, 13)]])
self.assertEqual(QgsGeometry.fromWkt('PolygonZ((11 13 1,14 15 2, 11 15 3, 11 13 1))').asPolygon(),
[[QgsPointXY(11, 13), QgsPointXY(14, 15), QgsPointXY(11, 15), QgsPointXY(11, 13)]])
self.assertEqual(QgsGeometry.fromWkt('PolygonM((11 13 1,14 15 2, 11 15 3, 11 13 1))').asPolygon(),
[[QgsPointXY(11, 13), QgsPointXY(14, 15), QgsPointXY(11, 15), QgsPointXY(11, 13)]])
self.assertEqual(QgsGeometry.fromWkt('PolygonZM((11 13 1 11,14 15 2 12 , 11 15 3 13 , 11 13 1 11))').asPolygon(),
[[QgsPointXY(11, 13), QgsPointXY(14, 15), QgsPointXY(11, 15), QgsPointXY(11, 13)]])
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('Point(11 13)').asPolygon()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('MultiPoint(11 13,14 15)').asPolygon()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('MultiLineString((11 13, 14 15),(1 2, 3 4))').asPolygon()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('LineString(11 13,14 15)').asPolygon()
with self.assertRaises(TypeError):
QgsGeometry.fromWkt('MultiPolygon(((11 13,14 15, 11 15, 11 13)))').asPolygon()
with self.assertRaises(ValueError):
QgsGeometry().asPolygon()
def testLineStringPythonAdditions(self):
"""
Tests Python specific additions to the QgsLineString API
"""
ls = QgsLineString()
self.assertTrue(bool(ls))
self.assertEqual(len(ls), 0)
ls = QgsLineString([QgsPoint(1, 2), QgsPoint(11, 12)])
self.assertTrue(bool(ls))
self.assertEqual(len(ls), 2)
# pointN
with self.assertRaises(IndexError):
ls.pointN(-3)
with self.assertRaises(IndexError):
ls.pointN(2)
self.assertEqual(ls.pointN(0), QgsPoint(1, 2))
self.assertEqual(ls.pointN(1), QgsPoint(11, 12))
self.assertEqual(ls.pointN(-2), QgsPoint(1, 2))
self.assertEqual(ls.pointN(-1), QgsPoint(11, 12))
# xAt
with self.assertRaises(IndexError):
ls.xAt(-3)
with self.assertRaises(IndexError):
ls.xAt(2)
self.assertEqual(ls.xAt(0), 1)
self.assertEqual(ls.xAt(1), 11)
self.assertEqual(ls.xAt(-2), 1)
self.assertEqual(ls.xAt(-1), 11)
# yAt
with self.assertRaises(IndexError):
ls.yAt(-3)
with self.assertRaises(IndexError):
ls.yAt(2)
self.assertEqual(ls.yAt(0), 2)
self.assertEqual(ls.yAt(1), 12)
self.assertEqual(ls.yAt(-2), 2)
self.assertEqual(ls.yAt(-1), 12)
# zAt
with self.assertRaises(IndexError):
ls.zAt(-3)
with self.assertRaises(IndexError):
ls.zAt(2)
# mAt
with self.assertRaises(IndexError):
ls.mAt(-3)
with self.assertRaises(IndexError):
ls.mAt(2)
ls = QgsLineString([QgsPoint(1, 2, 3, 4), QgsPoint(11, 12, 13, 14)])
self.assertEqual(ls.zAt(0), 3)
self.assertEqual(ls.zAt(1), 13)
self.assertEqual(ls.zAt(-2), 3)
self.assertEqual(ls.zAt(-1), 13)
self.assertEqual(ls.mAt(0), 4)
self.assertEqual(ls.mAt(1), 14)
self.assertEqual(ls.mAt(-2), 4)
self.assertEqual(ls.mAt(-1), 14)
# setXAt
with self.assertRaises(IndexError):
ls.setXAt(-3, 55)
with self.assertRaises(IndexError):
ls.setXAt(2, 55)
ls.setXAt(0, 5)
ls.setXAt(1, 15)
self.assertEqual(ls.xAt(0), 5)
self.assertEqual(ls.xAt(1), 15)
ls.setXAt(-2, 25)
ls.setXAt(-1, 26)
self.assertEqual(ls.xAt(0), 25)
self.assertEqual(ls.xAt(1), 26)
# setYAt
with self.assertRaises(IndexError):
ls.setYAt(-3, 66)
with self.assertRaises(IndexError):
ls.setYAt(2, 66)
ls.setYAt(0, 6)
ls.setYAt(1, 16)
self.assertEqual(ls.yAt(0), 6)
self.assertEqual(ls.yAt(1), 16)
ls.setYAt(-2, 16)
ls.setYAt(-1, 22)
self.assertEqual(ls.yAt(0), 16)
self.assertEqual(ls.yAt(1), 22)
# setZAt
with self.assertRaises(IndexError):
ls.setZAt(-3, 77)
with self.assertRaises(IndexError):
ls.setZAt(2, 77)
ls.setZAt(0, 7)
ls.setZAt(1, 17)
self.assertEqual(ls.zAt(0), 7)
self.assertEqual(ls.zAt(1), 17)
ls.setZAt(-2, 37)
ls.setZAt(-1, 47)
self.assertEqual(ls.zAt(0), 37)
self.assertEqual(ls.zAt(1), 47)
# setMAt
with self.assertRaises(IndexError):
ls.setMAt(-3, 88)
with self.assertRaises(IndexError):
ls.setMAt(2, 88)
ls.setMAt(0, 8)
ls.setMAt(1, 18)
self.assertEqual(ls.mAt(0), 8)
self.assertEqual(ls.mAt(1), 18)
ls.setMAt(-2, 58)
ls.setMAt(-1, 68)
self.assertEqual(ls.mAt(0), 58)
self.assertEqual(ls.mAt(1), 68)
# get item
with self.assertRaises(IndexError):
ls[-3]
with self.assertRaises(IndexError):
ls[2]
self.assertEqual(ls[0], QgsPoint(25, 16, 37, 58))
self.assertEqual(ls[1], QgsPoint(26, 22, 47, 68))
self.assertEqual(ls[-2], QgsPoint(25, 16, 37, 58))
self.assertEqual(ls[-1], QgsPoint(26, 22, 47, 68))
# set item
with self.assertRaises(IndexError):
ls[-3] = QgsPoint(33, 34)
with self.assertRaises(IndexError):
ls[2] = QgsPoint(33, 34)
ls[0] = QgsPoint(33, 34, 35, 36)
ls[1] = QgsPoint(43, 44, 45, 46)
self.assertEqual(ls[0], QgsPoint(33, 34, 35, 36))
self.assertEqual(ls[1], QgsPoint(43, 44, 45, 46))
ls[-2] = QgsPoint(133, 134, 135, 136)
ls[-1] = QgsPoint(143, 144, 145, 146)
self.assertEqual(ls[0], QgsPoint(133, 134, 135, 136))
self.assertEqual(ls[1], QgsPoint(143, 144, 145, 146))
# set item, z/m handling
ls[0] = QgsPoint(66, 67)
self.assertEqual(ls[0], QgsPoint(66, 67, None, None, QgsWkbTypes.PointZM))
ls[0] = QgsPoint(77, 78, 79)
self.assertEqual(ls[0], QgsPoint(77, 78, 79, None, QgsWkbTypes.PointZM))
ls[0] = QgsPoint(77, 78, None, 80, QgsWkbTypes.PointZM)
self.assertEqual(ls[0], QgsPoint(77, 78, None, 80, QgsWkbTypes.PointZM))
ls = QgsLineString([QgsPoint(1, 2), QgsPoint(11, 12)])
ls[0] = QgsPoint(66, 67)
self.assertEqual(ls[0], QgsPoint(66, 67))
ls[0] = QgsPoint(86, 87, 89, 90)
self.assertEqual(ls[0], QgsPoint(86, 87))
# del item
ls = QgsLineString([QgsPoint(1, 2), QgsPoint(11, 12), QgsPoint(33, 34)])
with self.assertRaises(IndexError):
del ls[-4]
with self.assertRaises(IndexError):
del ls[3]
del ls[1]
self.assertEqual(len(ls), 2)
self.assertEqual(ls[0], QgsPoint(1, 2))
self.assertEqual(ls[1], QgsPoint(33, 34))
with self.assertRaises(IndexError):
del ls[2]
ls = QgsLineString([QgsPoint(1, 2), QgsPoint(11, 12), QgsPoint(33, 34)])
del ls[-3]
self.assertEqual(len(ls), 2)
self.assertEqual(ls[0], QgsPoint(11, 12))
self.assertEqual(ls[1], QgsPoint(33, 34))
with self.assertRaises(IndexError):
del ls[-3]
def testGeometryCollectionPythonAdditions(self):
"""
Tests Python specific additions to the QgsGeometryCollection API
"""
g = QgsGeometryCollection()
self.assertTrue(bool(g))
self.assertEqual(len(g), 0)
g = QgsGeometryCollection()
g.fromWkt('GeometryCollection( Point(1 2), Point(11 12))')
self.assertTrue(bool(g))
self.assertEqual(len(g), 2)
# pointN
with self.assertRaises(IndexError):
g.geometryN(-1)
with self.assertRaises(IndexError):
g.geometryN(2)
self.assertEqual(g.geometryN(0), QgsPoint(1, 2))
self.assertEqual(g.geometryN(1), QgsPoint(11, 12))
# removeGeometry
g.fromWkt('GeometryCollection( Point(1 2), Point(11 12), Point(33 34))')
with self.assertRaises(IndexError):
g.removeGeometry(-1)
with self.assertRaises(IndexError):
g.removeGeometry(3)
g.removeGeometry(1)
self.assertEqual(len(g), 2)
self.assertEqual(g.geometryN(0), QgsPoint(1, 2))
self.assertEqual(g.geometryN(1), QgsPoint(33, 34))
with self.assertRaises(IndexError):
g.removeGeometry(2)
g.fromWkt('GeometryCollection( Point(25 16 37 58), Point(26 22 47 68))')
# get item
with self.assertRaises(IndexError):
g[-3]
with self.assertRaises(IndexError):
g[2]
self.assertEqual(g[0], QgsPoint(25, 16, 37, 58))
self.assertEqual(g[1], QgsPoint(26, 22, 47, 68))
self.assertEqual(g[-2], QgsPoint(25, 16, 37, 58))
self.assertEqual(g[-1], QgsPoint(26, 22, 47, 68))
# del item
g.fromWkt('GeometryCollection( Point(1 2), Point(11 12), Point(33 34))')
with self.assertRaises(IndexError):
del g[-4]
with self.assertRaises(IndexError):
del g[3]
del g[1]
self.assertEqual(len(g), 2)
self.assertEqual(g[0], QgsPoint(1, 2))
self.assertEqual(g[1], QgsPoint(33, 34))
with self.assertRaises(IndexError):
del g[2]
g.fromWkt('GeometryCollection( Point(1 2), Point(11 12), Point(33 34))')
del g[-3]
self.assertEqual(len(g), 2)
self.assertEqual(g[0], QgsPoint(11, 12))
self.assertEqual(g[1], QgsPoint(33, 34))
with self.assertRaises(IndexError):
del g[-3]
# iteration
g = QgsGeometryCollection()
self.assertFalse([p for p in g])
g.fromWkt('GeometryCollection( Point(1 2), Point(11 12), LineString(33 34, 44 45))')
self.assertEqual([p.asWkt() for p in g], ['Point (1 2)', 'Point (11 12)', 'LineString (33 34, 44 45)'])
def testCurvePolygonPythonAdditions(self):
"""
Tests Python specific additions to the QgsCurvePolygon API
"""
# interiorRing
g = QgsPolygon()
with self.assertRaises(IndexError):
g.interiorRing(-1)
with self.assertRaises(IndexError):
g.interiorRing(0)
g.fromWkt('Polygon((0 0, 1 0, 1 1, 0 0),(0.1 0.1, 0.2 0.1, 0.2 0.2, 0.1 0.1),(0.8 0.8, 0.9 0.8, 0.9 0.9, 0.8 0.8))')
with self.assertRaises(IndexError):
g.interiorRing(-1)
with self.assertRaises(IndexError):
g.interiorRing(2)
self.assertEqual(g.interiorRing(0).asWkt(1), 'LineString (0.1 0.1, 0.2 0.1, 0.2 0.2, 0.1 0.1)')
self.assertEqual(g.interiorRing(1).asWkt(1), 'LineString (0.8 0.8, 0.9 0.8, 0.9 0.9, 0.8 0.8)')
# removeInteriorRing
g = QgsPolygon()
with self.assertRaises(IndexError):
g.removeInteriorRing(-1)
with self.assertRaises(IndexError):
g.removeInteriorRing(0)
g.fromWkt(
'Polygon((0 0, 1 0, 1 1, 0 0),(0.1 0.1, 0.2 0.1, 0.2 0.2, 0.1 0.1),(0.8 0.8, 0.9 0.8, 0.9 0.9, 0.8 0.8))')
with self.assertRaises(IndexError):
g.removeInteriorRing(-1)
with self.assertRaises(IndexError):
g.removeInteriorRing(2)
g.removeInteriorRing(1)
self.assertEqual(g.asWkt(1), 'Polygon ((0 0, 1 0, 1 1, 0 0),(0.1 0.1, 0.2 0.1, 0.2 0.2, 0.1 0.1))')
with self.assertRaises(IndexError):
g.removeInteriorRing(1)
g.removeInteriorRing(0)
self.assertEqual(g.asWkt(1), 'Polygon ((0 0, 1 0, 1 1, 0 0))')
with self.assertRaises(IndexError):
g.removeInteriorRing(0)
def testReferenceGeometry(self):
""" Test parsing a whole range of valid reference wkt formats and variants, and checking
expected values such as length, area, centroids, bounding boxes, etc of the resultant geometry.
Note the bulk of this test data was taken from the PostGIS WKT test data """
with open(os.path.join(TEST_DATA_DIR, 'geom_data.csv'), 'r') as f:
reader = csv.DictReader(f)
for i, row in enumerate(reader):
# test that geometry can be created from WKT
geom = QgsGeometry.fromWkt(row['wkt'])
if row['valid_wkt']:
assert geom, "WKT conversion {} failed: could not create geom:\n{}\n".format(i + 1, row['wkt'])
else:
assert not geom, "Corrupt WKT {} was incorrectly converted to geometry:\n{}\n".format(i + 1, row['wkt'])
continue
# test exporting to WKT results in expected string
result = geom.asWkt()
exp = row['valid_wkt']
assert compareWkt(result, exp, 0.000001), "WKT conversion {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test num points in geometry
exp_nodes = int(row['num_points'])
self.assertEqual(geom.constGet().nCoordinates(), exp_nodes, "Node count {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp_nodes, geom.constGet().nCoordinates()))
# test num geometries in collections
exp_geometries = int(row['num_geometries'])
try:
self.assertEqual(geom.constGet().numGeometries(), exp_geometries, "Geometry count {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp_geometries, geom.constGet().numGeometries()))
except:
# some geometry types don't have numGeometries()
assert exp_geometries <= 1, "Geometry count {}: Expected:\n{} geometries but could not call numGeometries()\n".format(i + 1, exp_geometries)
# test count of rings
exp_rings = int(row['num_rings'])
try:
self.assertEqual(geom.constGet().numInteriorRings(), exp_rings, "Ring count {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp_rings, geom.constGet().numInteriorRings()))
except:
# some geometry types don't have numInteriorRings()
assert exp_rings <= 1, "Ring count {}: Expected:\n{} rings but could not call numInteriorRings()\n{}".format(i + 1, exp_rings, geom.constGet())
# test isClosed
exp = (row['is_closed'] == '1')
try:
self.assertEqual(geom.constGet().isClosed(), exp, "isClosed {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, True, geom.constGet().isClosed()))
except:
# some geometry types don't have isClosed()
assert not exp, "isClosed {}: Expected:\n isClosed() but could not call isClosed()\n".format(i + 1)
# test geometry centroid
exp = row['centroid']
result = geom.centroid().asWkt()
assert compareWkt(result, exp, 0.00001), "Centroid {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result)
# test bounding box limits
bbox = geom.constGet().boundingBox()
exp = float(row['x_min'])
result = bbox.xMinimum()
self.assertAlmostEqual(result, exp, 5, "Min X {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
exp = float(row['y_min'])
result = bbox.yMinimum()
self.assertAlmostEqual(result, exp, 5, "Min Y {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
exp = float(row['x_max'])
result = bbox.xMaximum()
self.assertAlmostEqual(result, exp, 5, "Max X {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
exp = float(row['y_max'])
result = bbox.yMaximum()
self.assertAlmostEqual(result, exp, 5, "Max Y {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
# test area calculation
exp = float(row['area'])
result = geom.constGet().area()
self.assertAlmostEqual(result, exp, 5, "Area {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
# test length calculation
exp = float(row['length'])
result = geom.constGet().length()
self.assertAlmostEqual(result, exp, 5, "Length {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
# test perimeter calculation
exp = float(row['perimeter'])
result = geom.constGet().perimeter()
self.assertAlmostEqual(result, exp, 5, "Perimeter {}: mismatch Expected:\n{}\nGot:\n{}\n".format(i + 1, exp, result))
def testCollection(self):
g = QgsGeometry.fromWkt('MultiLineString()')
self.assertEqual(len(g.get()), 0)
self.assertTrue(g.get())
g = QgsGeometry.fromWkt('MultiLineString((0 0, 1 1),(13 2, 14 1))')
self.assertEqual(len(g.get()), 2)
self.assertTrue(g.get())
self.assertEqual(g.get().geometryN(0).asWkt(), 'LineString (0 0, 1 1)')
self.assertEqual(g.get().geometryN(1).asWkt(), 'LineString (13 2, 14 1)')
with self.assertRaises(IndexError):
g.get().geometryN(-1)
with self.assertRaises(IndexError):
g.get().geometryN(2)
def testIntersection(self):
myLine = QgsGeometry.fromPolylineXY([
QgsPointXY(0, 0),
QgsPointXY(1, 1),
QgsPointXY(2, 2)])
myPoint = QgsGeometry.fromPointXY(QgsPointXY(1, 1))
intersectionGeom = QgsGeometry.intersection(myLine, myPoint)
self.assertEqual(intersectionGeom.wkbType(), QgsWkbTypes.Point)
layer = QgsVectorLayer("Point", "intersection", "memory")
assert layer.isValid(), "Failed to create valid point memory layer"
provider = layer.dataProvider()
ft = QgsFeature()
ft.setGeometry(intersectionGeom)
provider.addFeatures([ft])
self.assertEqual(layer.featureCount(), 1)
def testBuffer(self):
myPoint = QgsGeometry.fromPointXY(QgsPointXY(1, 1))
bufferGeom = myPoint.buffer(10, 5)
self.assertEqual(bufferGeom.wkbType(), QgsWkbTypes.Polygon)
myTestPoint = QgsGeometry.fromPointXY(QgsPointXY(3, 3))
self.assertTrue(bufferGeom.intersects(myTestPoint))
def testContains(self):
myPoly = QgsGeometry.fromPolygonXY(
[[QgsPointXY(0, 0),
QgsPointXY(2, 0),
QgsPointXY(2, 2),
QgsPointXY(0, 2),
QgsPointXY(0, 0)]])
myPoint = QgsGeometry.fromPointXY(QgsPointXY(1, 1))
self.assertTrue(QgsGeometry.contains(myPoly, myPoint))
def testTouches(self):
myLine = QgsGeometry.fromPolylineXY([
QgsPointXY(0, 0),
QgsPointXY(1, 1),
QgsPointXY(2, 2)])
myPoly = QgsGeometry.fromPolygonXY([[
QgsPointXY(0, 0),
QgsPointXY(1, 1),
QgsPointXY(2, 0),
QgsPointXY(0, 0)]])
touchesGeom = QgsGeometry.touches(myLine, myPoly)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", touchesGeom))
assert touchesGeom, myMessage
def testOverlaps(self):
myPolyA = QgsGeometry.fromPolygonXY([[
QgsPointXY(0, 0),
QgsPointXY(1, 3),
QgsPointXY(2, 0),
QgsPointXY(0, 0)]])
myPolyB = QgsGeometry.fromPolygonXY([[
QgsPointXY(0, 0),
QgsPointXY(2, 0),
QgsPointXY(2, 2),
QgsPointXY(0, 2),
QgsPointXY(0, 0)]])
overlapsGeom = QgsGeometry.overlaps(myPolyA, myPolyB)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", overlapsGeom))
assert overlapsGeom, myMessage
def testWithin(self):
myLine = QgsGeometry.fromPolylineXY([
QgsPointXY(0.5, 0.5),
QgsPointXY(1, 1),
QgsPointXY(1.5, 1.5)
])
myPoly = QgsGeometry.fromPolygonXY([[
QgsPointXY(0, 0),
QgsPointXY(2, 0),
QgsPointXY(2, 2),
QgsPointXY(0, 2),
QgsPointXY(0, 0)]])
withinGeom = QgsGeometry.within(myLine, myPoly)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", withinGeom))
assert withinGeom, myMessage
def testEquals(self):
myPointA = QgsGeometry.fromPointXY(QgsPointXY(1, 1))
myPointB = QgsGeometry.fromPointXY(QgsPointXY(1, 1))
equalsGeom = QgsGeometry.equals(myPointA, myPointB)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", equalsGeom))
assert equalsGeom, myMessage
def testCrosses(self):
myLine = QgsGeometry.fromPolylineXY([
QgsPointXY(0, 0),
QgsPointXY(1, 1),
QgsPointXY(3, 3)])
myPoly = QgsGeometry.fromPolygonXY([[
QgsPointXY(1, 0),
QgsPointXY(2, 0),
QgsPointXY(2, 2),
QgsPointXY(1, 2),
QgsPointXY(1, 0)]])
crossesGeom = QgsGeometry.crosses(myLine, myPoly)
myMessage = ('Expected:\n%s\nGot:\n%s\n' %
("True", crossesGeom))
assert crossesGeom, myMessage
def testSimplifyIssue4189(self):
"""Test we can simplify a complex geometry.
Note: there is a ticket related to this issue here:
https://issues.qgis.org/issues/4189
Backstory: Ole Nielson pointed out an issue to me
(Tim Sutton) where simplify ftools was dropping
features. This test replicates that issues.
Interestingly we could replicate the issue in PostGIS too:
- doing straight simplify returned no feature
- transforming to UTM49, then simplify with e.g. 200 threshold is OK
- as above with 500 threshold drops the feature
pgsql2shp -f /tmp/dissolve500.shp gis 'select *,
transform(simplify(transform(geom,32649),500), 4326) as
simplegeom from dissolve;'
"""
with open(os.path.join(unitTestDataPath('wkt'), 'simplify_error.wkt'), 'rt') as myWKTFile:
myWKT = myWKTFile.readline()
# print myWKT
myGeometry = QgsGeometry().fromWkt(myWKT)
assert myGeometry is not None
myStartLength = len(myWKT)
myTolerance = 0.00001
mySimpleGeometry = myGeometry.simplify(myTolerance)
myEndLength = len(mySimpleGeometry.asWkt())
myMessage = 'Before simplify: %i\nAfter simplify: %i\n : Tolerance %e' % (
myStartLength, myEndLength, myTolerance)
myMinimumLength = len('Polygon(())')
assert myEndLength > myMinimumLength, myMessage
def testClipping(self):
"""Test that we can clip geometries using other geometries."""
myMemoryLayer = QgsVectorLayer(
('LineString?crs=epsg:4326&field=name:string(20)&index=yes'),
'clip-in',
'memory')
assert myMemoryLayer is not None, 'Provider not initialized'
myProvider = myMemoryLayer.dataProvider()
assert myProvider is not None
myFeature1 = QgsFeature()
myFeature1.setGeometry(QgsGeometry.fromPolylineXY([
QgsPointXY(10, 10),
QgsPointXY(20, 10),
QgsPointXY(30, 10),
QgsPointXY(40, 10),
]))
myFeature1.setAttributes(['Johny'])
myFeature2 = QgsFeature()
myFeature2.setGeometry(QgsGeometry.fromPolylineXY([
QgsPointXY(10, 10),
QgsPointXY(20, 20),
QgsPointXY(30, 30),
QgsPointXY(40, 40),
]))
myFeature2.setAttributes(['Be'])
myFeature3 = QgsFeature()
myFeature3.setGeometry(QgsGeometry.fromPolylineXY([
QgsPointXY(10, 10),
QgsPointXY(10, 20),
QgsPointXY(10, 30),
QgsPointXY(10, 40),
]))
myFeature3.setAttributes(['Good'])
myResult, myFeatures = myProvider.addFeatures(
[myFeature1, myFeature2, myFeature3])
assert myResult
self.assertEqual(len(myFeatures), 3)
myClipPolygon = QgsGeometry.fromPolygonXY([[
QgsPointXY(20, 20),
QgsPointXY(20, 30),
QgsPointXY(30, 30),
QgsPointXY(30, 20),
QgsPointXY(20, 20),
]])
print(('Clip: %s' % myClipPolygon.asWkt()))
writeShape(myMemoryLayer, 'clipGeometryBefore.shp')
fit = myProvider.getFeatures()
myFeatures = []
myFeature = QgsFeature()
while fit.nextFeature(myFeature):
myGeometry = myFeature.geometry()
if myGeometry.intersects(myClipPolygon):
# Adds nodes where the clip and the line intersec
myCombinedGeometry = myGeometry.combine(myClipPolygon)
# Gives you the areas inside the clip
mySymmetricalGeometry = myGeometry.symDifference(
myCombinedGeometry)
# Gives you areas outside the clip area
# myDifferenceGeometry = myCombinedGeometry.difference(
# myClipPolygon)
# print 'Original: %s' % myGeometry.asWkt()
# print 'Combined: %s' % myCombinedGeometry.asWkt()
# print 'Difference: %s' % myDifferenceGeometry.asWkt()
print(('Symmetrical: %s' % mySymmetricalGeometry.asWkt()))
myExpectedWkt = 'Polygon ((20 20, 20 30, 30 30, 30 20, 20 20))'
# There should only be one feature that intersects this clip
# poly so this assertion should work.
assert compareWkt(myExpectedWkt,
mySymmetricalGeometry.asWkt())
myNewFeature = QgsFeature()
myNewFeature.setAttributes(myFeature.attributes())
myNewFeature.setGeometry(mySymmetricalGeometry)
myFeatures.append(myNewFeature)
myNewMemoryLayer = QgsVectorLayer(
('Polygon?crs=epsg:4326&field=name:string(20)&index=yes'),
'clip-out',
'memory')
myNewProvider = myNewMemoryLayer.dataProvider()
myResult, myFeatures = myNewProvider.addFeatures(myFeatures)
self.assertTrue(myResult)
self.assertEqual(len(myFeatures), 1)
writeShape(myNewMemoryLayer, 'clipGeometryAfter.shp')
def testClosestVertex(self):
# 2-+-+-+-+-3
# | |
# + 6-+-+-7 +
# | | | |
# + + 9-+-8 +
# | | |
# ! 5-+-+-+-4 !
# |
# 1-+-+-+-+-0 !
polyline = QgsGeometry.fromPolylineXY(
[QgsPointXY(5, 0), QgsPointXY(0, 0), QgsPointXY(0, 4), QgsPointXY(5, 4), QgsPointXY(5, 1), QgsPointXY(1, 1), QgsPointXY(1, 3), QgsPointXY(4, 3), QgsPointXY(4, 2), QgsPointXY(2, 2)]
)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPointXY(6, 1))
self.assertEqual(point, QgsPointXY(5, 1))
self.assertEqual(beforeVertex, 3)
self.assertEqual(atVertex, 4)
self.assertEqual(afterVertex, 5)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex, leftOf) = polyline.closestSegmentWithContext(QgsPointXY(6, 2))
self.assertEqual(dist, 1)
self.assertEqual(minDistPoint, QgsPointXY(5, 2))
self.assertEqual(afterVertex, 4)
self.assertEqual(leftOf, -1)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPointXY(6, 0))
self.assertEqual(point, QgsPointXY(5, 0))
self.assertEqual(beforeVertex, -1)
self.assertEqual(atVertex, 0)
self.assertEqual(afterVertex, 1)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex, leftOf) = polyline.closestSegmentWithContext(QgsPointXY(6, 0))
self.assertEqual(dist, 1)
self.assertEqual(minDistPoint, QgsPointXY(5, 0))
self.assertEqual(afterVertex, 1)
self.assertEqual(leftOf, 0)
(point, atVertex, beforeVertex, afterVertex, dist) = polyline.closestVertex(QgsPointXY(0, -1))
self.assertEqual(point, QgsPointXY(0, 0))
self.assertEqual(beforeVertex, 0)
self.assertEqual(atVertex, 1)
self.assertEqual(afterVertex, 2)
self.assertEqual(dist, 1)
(dist, minDistPoint, afterVertex, leftOf) = polyline.closestSegmentWithContext(QgsPointXY(0, 1))
self.assertEqual(dist, 0)
self.assertEqual(minDistPoint, QgsPointXY(0, 1))
self.assertEqual(afterVertex, 2)
self.assertEqual(leftOf, 0)
# 2-3 6-+-7 !
# | | | |
# 0-1 4 5 8-9
polyline = QgsGeometry.fromMultiPolylineXY(
[
[QgsPointXY(0, 0), QgsPointXY(1, 0), QgsPointXY(1, 1), QgsPointXY(2, 1), QgsPointXY(2, 0), ],
[QgsPointXY(3, 0), QgsPointXY(3, 1), QgsPointXY(5, 1), QgsPointXY(5, 0), QgsPointXY(6, 0), ]