def clip_by_rect(geom, xmin, ymin, xmax, ymax):
"""Returns the portion of a geometry within a rectangle
The geometry is clipped in a fast but possibly dirty way. The output is
not guaranteed to be valid. No exceptions will be raised for topological
errors.
Parameters
----------
geom : geometry
The geometry to be clipped
xmin : float
Minimum x value of the rectangle
ymin : float
Minimum y value of the rectangle
xmax : float
Maximum x value of the rectangle
ymax : float
Maximum y value of the rectangle
Notes
-----
Requires GEOS >= 3.5.0
New in 1.7.
"""
if geom.is_empty:
return geom
return shapely.clip_by_rect(geom, xmin, ymin, xmax, ymax)
def test_clip_by_rect_non_scalar_kwargs():
msg = "only accepts scalar values"
with pytest.raises(TypeError, match=msg):
shapely.clip_by_rect([line_string, line_string], 0, 0, 1, np.array([0, 1]))
def test_clip_by_rect_empty(geom):
# TODO empty point
actual = shapely.clip_by_rect(geom, 0, 0, 1, 1)
assert actual == Geometry("GEOMETRYCOLLECTION EMPTY")
def test_clip_by_rect_missing():
actual = shapely.clip_by_rect(None, 0, 0, 1, 1)
assert actual is None
def test_clip_by_rect_array(geometry):
actual = shapely.clip_by_rect([geometry, geometry], 0.0, 0.0, 1.0, 1.0)
assert actual.shape == (2,)
assert actual[0] is None or isinstance(actual[0], Geometry)
def test_clip_by_rect_polygon(geom, rect, expected):
geom, expected = shapely.Geometry(geom), shapely.Geometry(expected)
actual = shapely.clip_by_rect(geom, *rect)
assert_geometries_equal(actual, expected)
def test_clip_by_rect(geom, expected):
geom, expected = shapely.Geometry(geom), shapely.Geometry(expected)
actual = shapely.clip_by_rect(geom, 10, 10, 20, 20)
assert_geometries_equal(actual, expected)
def time_clip_by_rect(self):
for bounds in self.bounds:
shapely.clip_by_rect(self.polygon, *bounds)