def test_clip_points_by_polygons_with_holes0(self):
"""Points can be clipped by polygons with holes
"""
# Define an outer ring
outer_ring = numpy.array([[106.79, -6.233], [106.80, -6.24],
[106.78, -6.23], [106.77, -6.21],
[106.79, -6.233]])
# Define inner rings
inner_rings = [
numpy.array([[106.77827, -6.2252], [106.77775, -6.22378],
[106.78, -6.22311], [106.78017, -6.22530],
[106.77827, -6.2252]])[::-1],
numpy.array([[106.78652, -6.23215], [106.78642, -6.23075],
[106.78746, -6.23143], [106.78831, -6.23307],
[106.78652, -6.23215]])[::-1]
]
v = Vector(
geometry=[Polygon(outer_ring=outer_ring, inner_rings=inner_rings)])
assert v.is_polygon_data
# Write it to file
tmp_filename = unique_filename(suffix='.shp')
v.write_to_file(tmp_filename)
# Read polygon it back
L = read_layer(tmp_filename)
P = L.get_geometry(as_geometry_objects=True)[0]
outer_ring = P.outer_ring
inner_ring0 = P.inner_rings[0]
inner_ring1 = P.inner_rings[1]
# Make some test points
points = generate_random_points_in_bbox(outer_ring, 1000, seed=13)
# Clip to outer ring, excluding holes
indices = inside_polygon(points, P.outer_ring, holes=P.inner_rings)
# Sanity
for point in points[indices, :]:
# Must be inside outer ring
assert is_inside_polygon(point, outer_ring)
# But not in any of the inner rings
assert not is_inside_polygon(point, inner_ring0)
assert not is_inside_polygon(point, inner_ring1)
if False:
# Store for visual check
pol = Vector(geometry=[P])
tmp_filename = unique_filename(suffix='.shp')
pol.write_to_file(tmp_filename)
# print 'Polygon with holes written to %s' % tmp_filename
pts = Vector(geometry=points[indices, :])
tmp_filename = unique_filename(suffix='.shp')
pts.write_to_file(tmp_filename)
def test_clip_points_by_polygons(self):
"""Points can be clipped by polygons (real data)
"""
# Name input files
point_name = join(TESTDATA, 'population_5x5_jakarta_points.shp')
point_layer = read_layer(point_name)
points = numpy.array(point_layer.get_geometry())
attrs = point_layer.get_data()
# Loop through polygons
for filename in ['polygon_0.shp', 'polygon_1.shp', 'polygon_2.shp',
'polygon_3.shp', 'polygon_4.shp',
'polygon_5.shp', 'polygon_6.shp']:
polygon_layer = read_layer(join(TESTDATA, filename))
polygon = polygon_layer.get_geometry()[0]
# Clip
indices = inside_polygon(points, polygon)
# Sanity
for point in points[indices, :]:
assert is_inside_polygon(point, polygon)
# Explicit tests
if filename == 'polygon_0.shp':
assert len(indices) == 6
elif filename == 'polygon_1.shp':
assert len(indices) == 2
assert numpy.allclose(points[indices[0], :],
[106.8125, -6.1875])
assert numpy.allclose(points[indices[1], :],
[106.8541667, -6.1875])
assert numpy.allclose(attrs[indices[0]]['value'],
331941.6875)
assert numpy.allclose(attrs[indices[1]]['value'],
496445.8125)
elif filename == 'polygon_2.shp':
assert len(indices) == 7
elif filename == 'polygon_3.shp':
assert len(indices) == 0 # Degenerate
elif filename == 'polygon_4.shp':
assert len(indices) == 0 # Degenerate
elif filename == 'polygon_5.shp':
assert len(indices) == 8
elif filename == 'polygon_6.shp':
assert len(indices) == 6
def test_clip_points_by_polygons_with_holes0(self):
"""Points can be clipped by polygons with holes
"""
# Define an outer ring
outer_ring = numpy.array([[106.79, -6.233],
[106.80, -6.24],
[106.78, -6.23],
[106.77, -6.21],
[106.79, -6.233]])
# Define inner rings
inner_rings = [numpy.array([[106.77827, -6.2252],
[106.77775, -6.22378],
[106.78, -6.22311],
[106.78017, -6.22530],
[106.77827, -6.2252]])[::-1],
numpy.array([[106.78652, -6.23215],
[106.78642, -6.23075],
[106.78746, -6.23143],
[106.78831, -6.23307],
[106.78652, -6.23215]])[::-1]]
v = Vector(geometry=[Polygon(outer_ring=outer_ring,
inner_rings=inner_rings)])
assert v.is_polygon_data
# Write it to file
tmp_filename = unique_filename(suffix='.shp')
v.write_to_file(tmp_filename)
# Read polygon it back
L = read_layer(tmp_filename)
P = L.get_geometry(as_geometry_objects=True)[0]
outer_ring = P.outer_ring
inner_ring0 = P.inner_rings[0]
inner_ring1 = P.inner_rings[1]
# Make some test points
points = generate_random_points_in_bbox(outer_ring, 1000, seed=13)
# Clip to outer ring, excluding holes
indices = inside_polygon(points, P.outer_ring, holes=P.inner_rings)
# Sanity
for point in points[indices, :]:
# Must be inside outer ring
assert is_inside_polygon(point, outer_ring)
# But not in any of the inner rings
assert not is_inside_polygon(point, inner_ring0)
assert not is_inside_polygon(point, inner_ring1)
if False:
# Store for visual check
pol = Vector(geometry=[P])
tmp_filename = unique_filename(suffix='.shp')
pol.write_to_file(tmp_filename)
print 'Polygon with holes written to %s' % tmp_filename
pts = Vector(geometry=points[indices, :])
tmp_filename = unique_filename(suffix='.shp')
pts.write_to_file(tmp_filename)
print 'Clipped points written to %s' % tmp_filename
def test_clip_points_by_polygons_with_holes_real(self):
"""Points can be clipped by polygons with holes (real data)
"""
# Read real polygon with holes
filename = '%s/%s' % (TESTDATA, 'donut.shp')
L = read_layer(filename)
# --------------------------------------------
# Pick one polygon that has 2 inner rings
P = L.get_geometry(as_geometry_objects=True)[1]
outer_ring = P.outer_ring
inner_ring0 = P.inner_rings[0]
inner_ring1 = P.inner_rings[1]
# Make some test points
points_in_bbox = generate_random_points_in_bbox(outer_ring, 1000)
points_in_inner_ring0 = populate_polygon(inner_ring0, 2, seed=13)
points_in_inner_ring1 = populate_polygon(inner_ring1, 2, seed=17)
points = numpy.concatenate((points_in_bbox,
points_in_inner_ring0,
points_in_inner_ring1))
# Clip
indices = inside_polygon(points, P.outer_ring, holes=P.inner_rings)
# Sanity
for point in points[indices, :]:
# Must be inside outer ring
assert is_inside_polygon(point, outer_ring)
# But not in any of the inner rings
assert not is_inside_polygon(point, inner_ring0)
assert not is_inside_polygon(point, inner_ring1)
# ---------------------------------------------------------
# Pick a polygon that has 1 inner ring (nice visualisation)
P = L.get_geometry(as_geometry_objects=True)[9]
outer_ring = P.outer_ring
inner_ring = P.inner_rings[0]
# Make some test points
points = generate_random_points_in_bbox(outer_ring, 500)
# Clip
indices = inside_polygon(points, P.outer_ring, holes=P.inner_rings)
# Sanity
for point in points[indices, :]:
# Must be inside outer ring
assert is_inside_polygon(point, outer_ring)
# But not in the inner ring
assert not is_inside_polygon(point, inner_ring)
# Store for visual check (nice one!)
# Uncomment os.remove if you want see the layers
pol = Vector(geometry=[P])
tmp_filename = unique_filename(suffix='.shp')
pol.write_to_file(tmp_filename)
# print 'Polygon with holes written to %s' % tmp_filename
os.remove(tmp_filename)
pts = Vector(geometry=points[indices, :])
tmp_filename = unique_filename(suffix='.shp')
pts.write_to_file(tmp_filename)
# print 'Clipped points written to %s' % tmp_filename
os.remove(tmp_filename)
