def testCalculateSourceDest(self):
context = QgsCoordinateTransformContext()
#empty context
self.assertEqual(
context.calculateDatumTransforms(
QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4283')),
QgsCoordinateTransform.TransformPair(-1, -1))
#add specific source/dest pair - should take precedence
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283'), 3, 4)
self.assertEqual(
context.calculateDatumTransforms(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:4283')),
QgsCoordinateTransform.TransformPair(3, 4))
self.assertEqual(
context.calculateDatumTransforms(
QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4283')),
QgsCoordinateTransform.TransformPair(-1, -1))
self.assertEqual(
context.calculateDatumTransforms(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:3111')),
QgsCoordinateTransform.TransformPair(-1, -1))
# check that reverse transforms are automatically supported
self.assertEqual(
context.calculateDatumTransforms(
QgsCoordinateReferenceSystem('EPSG:4283'),
QgsCoordinateReferenceSystem('EPSG:28356')),
QgsCoordinateTransform.TransformPair(4, 3))
def testReadWriteSettings(self):
context = QgsCoordinateTransformContext()
context.readSettings()
source_id_1 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4204),
QgsCoordinateReferenceSystem(4326))[0].sourceTransformId
dest_id_1 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4204),
QgsCoordinateReferenceSystem(4326))[0].destinationTransformId
source_id_2 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4205),
QgsCoordinateReferenceSystem(4326))[0].sourceTransformId
dest_id_2 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4205),
QgsCoordinateReferenceSystem(4326))[0].destinationTransformId
# should be empty
self.assertEqual(context.sourceDestinationDatumTransforms(), {})
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:4204'),
QgsCoordinateReferenceSystem('EPSG:4326'), source_id_1,
dest_id_1))
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:4205'),
QgsCoordinateReferenceSystem(4326), source_id_2, dest_id_2))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:4204', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_1, dest_id_1),
('EPSG:4205', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_2, dest_id_2)
})
# save to settings
context.writeSettings()
# restore from settings
context2 = QgsCoordinateTransformContext()
self.assertEqual(context2.sourceDestinationDatumTransforms(), {})
context2.readSettings()
# check result
self.assertEqual(
context2.sourceDestinationDatumTransforms(), {
('EPSG:4204', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_1, dest_id_1),
('EPSG:4205', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_2, dest_id_2)
})
def testWriteReadXml(self):
# setup a context
context = QgsCoordinateTransformContext()
source_id_1 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4204),
QgsCoordinateReferenceSystem(4326))[0].sourceTransformId
dest_id_1 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4204),
QgsCoordinateReferenceSystem(4326))[0].destinationTransformId
source_id_2 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4205),
QgsCoordinateReferenceSystem(4326))[0].sourceTransformId
dest_id_2 = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4205),
QgsCoordinateReferenceSystem(4326))[0].destinationTransformId
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(4204),
QgsCoordinateReferenceSystem(4326), source_id_1, dest_id_1))
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(4205),
QgsCoordinateReferenceSystem(4326), source_id_2, dest_id_2))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:4204', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_1, dest_id_1),
('EPSG:4205', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_2, dest_id_2)
})
# save to xml
doc = QDomDocument("testdoc")
elem = doc.createElement("test")
context.writeXml(elem, QgsReadWriteContext())
# restore from xml
context2 = QgsCoordinateTransformContext()
context2.readXml(elem, QgsReadWriteContext())
# check result
self.assertEqual(
context2.sourceDestinationDatumTransforms(), {
('EPSG:4204', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_1, dest_id_1),
('EPSG:4205', 'EPSG:4326'):
QgsCoordinateTransform.TransformPair(source_id_2, dest_id_2)
})
def testProject(self):
"""
Test project's transform context
"""
project = QgsProject()
context_changed_spy = QSignalSpy(project.transformContextChanged)
context = project.transformContext()
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4283'), 1, 2)
project.setTransformContext(context)
self.assertEqual(len(context_changed_spy), 1)
self.assertEqual(
project.transformContext().sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2)
})
def testSourceDestinationDatumTransforms(self):
context = QgsCoordinateTransformContext()
self.assertEqual(context.sourceDestinationDatumTransforms(), {})
self.assertFalse(
context.hasTransform(QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4283')))
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4283'), 1, 2))
self.assertTrue(
context.hasTransform(QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4283')))
self.assertFalse(
context.hasTransform(QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem('EPSG:4326')))
self.assertFalse(
context.hasTransform(QgsCoordinateReferenceSystem('EPSG:3113'),
QgsCoordinateReferenceSystem('EPSG:4283')))
self.assertEqual(context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2)
})
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem(4283), 3, 4))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4)
})
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem(28357), 7, 8))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(7, 8)
})
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:28356'),
QgsCoordinateReferenceSystem('EPSG:28357'), 9, 11))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11)
})
# invalid additions
self.assertFalse(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(),
QgsCoordinateReferenceSystem('EPSG:28357'), 9, 11))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11)
})
self.assertFalse(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem('EPSG:3111'),
QgsCoordinateReferenceSystem(), 9, 11))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11)
})
# indicate no transform required
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(28357),
QgsCoordinateReferenceSystem(28356), -1, -1))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11),
('EPSG:28357', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, -1)
})
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(3111),
QgsCoordinateReferenceSystem(28356), 17, -1))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11),
('EPSG:28357', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, -1),
('EPSG:3111', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(17, -1)
})
self.assertTrue(
context.addSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(3113),
QgsCoordinateReferenceSystem(28356), -1, 18))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11),
('EPSG:28357', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, -1),
('EPSG:3111', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(17, -1),
('EPSG:3113', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, 18)
})
# remove non-existing
context.removeSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(3113),
QgsCoordinateReferenceSystem(3111))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:3111', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(1, 2),
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11),
('EPSG:28357', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, -1),
('EPSG:3111', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(17, -1),
('EPSG:3113', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, 18)
})
# remove existing
context.removeSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(3111),
QgsCoordinateReferenceSystem(4283))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11),
('EPSG:28357', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, -1),
('EPSG:3111', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(17, -1),
('EPSG:3113', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, 18)
})
context.removeSourceDestinationDatumTransform(
QgsCoordinateReferenceSystem(3111),
QgsCoordinateReferenceSystem(28356))
self.assertEqual(
context.sourceDestinationDatumTransforms(), {
('EPSG:28356', 'EPSG:4283'):
QgsCoordinateTransform.TransformPair(3, 4),
('EPSG:28356', 'EPSG:28357'):
QgsCoordinateTransform.TransformPair(9, 11),
('EPSG:28357', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, -1),
('EPSG:3113', 'EPSG:28356'):
QgsCoordinateTransform.TransformPair(-1, 18)
})
context.clear()
self.assertEqual(context.sourceDestinationDatumTransforms(), {})
