def testTransformInfo(self):
# hopefully this transform is available on all platforms!
transforms = QgsCoordinateTransform.datumTransformations(
QgsCoordinateReferenceSystem(4613),
QgsCoordinateReferenceSystem(4326))
self.assertTrue(len(transforms) > 0)
self.assertIn('+towgs84=-403,684,41', [
QgsCoordinateTransform.datumTransformToProj(t.sourceTransformId)
for t in transforms
])
self.assertIn('+towgs84=-403,684,41', [
QgsCoordinateTransform.datumTransformToProj(
t.destinationTransformId) for t in transforms
])
self.assertIn('EPSG:4613', [
QgsCoordinateTransform.datumTransformInfo(
t.destinationTransformId).sourceCrsAuthId for t in transforms
])
self.assertIn('EPSG:4326', [
QgsCoordinateTransform.datumTransformInfo(
t.destinationTransformId).destinationCrsAuthId
for t in transforms
])
def testStringToTransformId(self):
"""
Test converting proj strings to corresponding datum IDs
"""
self.assertEqual(
QgsCoordinateTransform.projStringToDatumTransformId(''), -1)
self.assertEqual(
QgsCoordinateTransform.projStringToDatumTransformId('not'), -1)
test_string = '+towgs84=-403,684,41'
id = QgsCoordinateTransform.projStringToDatumTransformId(test_string)
self.assertNotEqual(id, -1)
string = QgsCoordinateTransform.datumTransformToProj(id)
self.assertEqual(string, test_string)
self.assertEqual(
QgsCoordinateTransform.projStringToDatumTransformId(
test_string.upper()), id)
