def test_transform(self):
"Testing `transform` method."
orig = GEOSGeometry("POINT (-104.609 38.255)", 4326)
trans = GEOSGeometry("POINT (992385.4472045 481455.4944650)", 2774)
# Using a srid, a SpatialReference object, and a CoordTransform object
# for transformations.
t1, t2, t3 = orig.clone(), orig.clone(), orig.clone()
t1.transform(trans.srid)
t2.transform(gdal.SpatialReference("EPSG:2774"))
ct = gdal.CoordTransform(gdal.SpatialReference("WGS84"), gdal.SpatialReference(2774))
t3.transform(ct)
# Testing use of the `clone` keyword.
k1 = orig.clone()
k2 = k1.transform(trans.srid, clone=True)
self.assertEqual(k1, orig)
self.assertNotEqual(k1, k2)
prec = 3
for p in (t1, t2, t3, k2):
self.assertAlmostEqual(trans.x, p.x, prec)
self.assertAlmostEqual(trans.y, p.y, prec)
def test_transform(self):
"Testing `transform` method."
orig = GEOSGeometry('POINT (-104.609 38.255)', 4326)
trans = GEOSGeometry('POINT (992385.4472045 481455.4944650)', 2774)
# Using a srid, a SpatialReference object, and a CoordTransform object
# for transformations.
t1, t2, t3 = orig.clone(), orig.clone(), orig.clone()
t1.transform(trans.srid)
t2.transform(gdal.SpatialReference('EPSG:2774'))
ct = gdal.CoordTransform(gdal.SpatialReference('WGS84'),
gdal.SpatialReference(2774))
t3.transform(ct)
# Testing use of the `clone` keyword.
k1 = orig.clone()
k2 = k1.transform(trans.srid, clone=True)
self.assertEqual(k1, orig)
self.assertNotEqual(k1, k2)
prec = 3
for p in (t1, t2, t3, k2):
self.assertAlmostEqual(trans.x, p.x, prec)
self.assertAlmostEqual(trans.y, p.y, prec)
def apply_to(self, geometry: GEOSGeometry, clone=False) -> GEOSGeometry | None:
"""Transform the geometry using this coordinate reference.
This method caches the used CoordTransform object
Every transformation within this package happens through this method,
giving full control over coordinate transformations.
"""
if self.srid == geometry.srid:
# Avoid changes if spatial reference system is identical.
if clone:
return geometry.clone()
else:
return
else:
# Convert using GDAL / proj
transform = _get_coord_transform(geometry.srid, self._as_gdal())
return geometry.transform(transform, clone=clone)
