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test_gridintersect.py
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import matplotlib.pyplot as plt
import numpy as np
import pytest
from modflow_devtools.markers import requires_pkg
from modflow_devtools.misc import has_pkg
import flopy.discretization as fgrid
from flopy.utils.gridintersect import GridIntersect
from flopy.utils.triangle import Triangle
# TODO: remove all structured tests in v3.10.0, see TODO's in the tests
if has_pkg("shapely", strict=True):
from shapely.geometry import (
LineString,
MultiLineString,
MultiPoint,
MultiPolygon,
Point,
Polygon,
)
rtree_toggle = pytest.mark.parametrize("rtree", [True, False])
def get_tri_grid(angrot=0.0, xyoffset=0.0, triangle_exe=None):
if not triangle_exe:
cell2d = [
[0, 16.666666666666668, 13.333333333333334, 3, 4, 2, 7],
[1, 3.3333333333333335, 6.666666666666667, 3, 4, 0, 5],
[2, 6.666666666666667, 16.666666666666668, 3, 1, 8, 4],
[3, 3.3333333333333335, 13.333333333333334, 3, 5, 1, 4],
[4, 6.666666666666667, 3.3333333333333335, 3, 6, 0, 4],
[5, 13.333333333333334, 3.3333333333333335, 3, 4, 3, 6],
[6, 16.666666666666668, 6.666666666666667, 3, 7, 3, 4],
[7, 13.333333333333334, 16.666666666666668, 3, 8, 2, 4],
]
vertices = [
[0, 0.0, 0.0],
[1, 0.0, 20.0],
[2, 20.0, 20.0],
[3, 20.0, 0.0],
[4, 10.0, 10.0],
[5, 0.0, 10.0],
[6, 10.0, 0.0],
[7, 20.0, 10.0],
[8, 10.0, 20.0],
]
else:
maximum_area = 50.0
x0, x1, y0, y1 = (0.0, 20.0, 0.0, 20.0)
domainpoly = [(x0, y0), (x0, y1), (x1, y1), (x1, y0)]
tri = Triangle(
maximum_area=maximum_area,
angle=45,
model_ws=".",
exe_name=triangle_exe,
)
tri.add_polygon(domainpoly)
tri.build(verbose=False)
cell2d = tri.get_cell2d()
vertices = tri.get_vertices()
tgr = fgrid.VertexGrid(
vertices,
cell2d,
botm=np.atleast_2d(np.zeros(len(cell2d))),
top=np.ones(len(cell2d)),
xoff=xyoffset,
yoff=xyoffset,
angrot=angrot,
)
return tgr
def get_rect_grid(angrot=0.0, xyoffset=0.0, top=None, botm=None):
delc = 10 * np.ones(2, dtype=float)
delr = 10 * np.ones(2, dtype=float)
sgr = fgrid.StructuredGrid(
delc,
delr,
top=top,
botm=botm,
xoff=xyoffset,
yoff=xyoffset,
angrot=angrot,
)
return sgr
def get_rect_vertex_grid(angrot=0.0, xyoffset=0.0):
cell2d = [
[0, 5.0, 5.0, 4, 0, 1, 4, 3],
[1, 15.0, 5.0, 4, 1, 2, 5, 4],
[2, 5.0, 15.0, 4, 3, 4, 7, 6],
[3, 15.0, 15.0, 4, 4, 5, 8, 7],
]
vertices = [
[0, 0.0, 0.0],
[1, 10.0, 0.0],
[2, 20.0, 0.0],
[3, 0.0, 10.0],
[4, 10.0, 10.0],
[5, 20.0, 10.0],
[6, 0.0, 20.0],
[7, 10.0, 20.0],
[8, 20.0, 20.0],
]
tgr = fgrid.VertexGrid(
vertices,
cell2d,
botm=np.atleast_2d(np.zeros(len(cell2d))),
top=np.ones(len(cell2d)),
xoff=xyoffset,
yoff=xyoffset,
angrot=angrot,
)
return tgr
# %% test point structured
@requires_pkg("shapely")
def test_rect_grid_3d_point_outside():
botm = np.concatenate([np.ones(4), np.zeros(4)]).reshape((2, 2, 2))
gr = get_rect_grid(top=np.ones(4).reshape((2, 2)), botm=botm)
ix = GridIntersect(gr, method="vertex")
result = ix.intersect(Point(25.0, 25.0, 0.5))
assert len(result) == 0
# TODO: fix 3D point tests to work when above or below grid
# @requires_pkg("shapely")
# def test_rect_grid_3d_point_inside():
# botm = np.concatenate(
# [
# np.ones(4),
# 0.5 * np.ones(4),
# np.zeros(4),
# ]
# ).reshape((3, 2, 2))
# gr = get_rect_grid(top=np.ones(4).reshape((2, 2)), botm=botm)
# ix = GridIntersect(gr, method="vertex")
# result = ix.intersect(Point(2.0, 2.0, 0.2))
# assert result.cellids[0] == (1, 0)
# @requires_pkg("shapely")
# def test_rect_grid_3d_point_above():
# botm = np.concatenate([np.ones(4), np.zeros(4)]).reshape((2, 2, 2))
# gr = get_rect_grid(top=np.ones(4).reshape((2, 2)), botm=botm)
# ix = GridIntersect(gr, method="vertex")
# result = ix.intersect(Point(2.0, 2.0, 2.0))
# assert len(result) == 0
@requires_pkg("shapely")
def test_rect_grid_point_outside():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
# use GeoSpatialUtil to convert to shapely geometry
result = ix.intersect((25.0, 25.0), shapetype="point")
assert len(result) == 0
@requires_pkg("shapely")
def test_rect_grid_point_on_outer_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(Point(20.0, 10.0))
assert len(result) == 1
assert np.all(result.cellids[0] == (0, 1))
@requires_pkg("shapely")
def test_rect_grid_point_on_inner_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(Point(10.0, 10.0))
assert len(result) == 1
assert np.all(result.cellids[0] == (0, 0))
@requires_pkg("shapely")
def test_rect_grid_multipoint_in_one_cell():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(MultiPoint([Point(1.0, 1.0), Point(2.0, 2.0)]))
assert len(result) == 1
assert result.cellids[0] == (1, 0)
@requires_pkg("shapely")
def test_rect_grid_multipoint_in_multiple_cells():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(MultiPoint([Point(1.0, 1.0), Point(12.0, 12.0)]))
assert len(result) == 2
assert result.cellids[0] == (1, 0)
assert result.cellids[1] == (0, 1)
# %% test point shapely
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_point_outside_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
# use GeoSpatialUtil to convert to shapely geometry
result = ix.intersect((25.0, 25.0), shapetype="point")
assert len(result) == 0
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_point_on_outer_boundary_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(Point(20.0, 10.0))
assert len(result) == 1
assert np.all(result.cellids[0] == (0, 1))
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_point_on_inner_boundary_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(Point(10.0, 10.0))
assert len(result) == 1
assert np.all(result.cellids[0] == (0, 0))
@requires_pkg("shapely")
@rtree_toggle
def test_rect_vertex_grid_point_in_one_cell_shapely(rtree):
gr = get_rect_vertex_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(Point(4.0, 4.0))
assert len(result) == 1
assert result.cellids[0] == 0
result = ix.intersect(Point(4.0, 6.0))
assert len(result) == 1
assert result.cellids[0] == 0
result = ix.intersect(Point(6.0, 6.0))
assert len(result) == 1
assert result.cellids[0] == 0
result = ix.intersect(Point(6.0, 4.0))
assert len(result) == 1
assert result.cellids[0] == 0
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_multipoint_in_one_cell_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(MultiPoint([Point(1.0, 1.0), Point(2.0, 2.0)]))
assert len(result) == 1
assert result.cellids[0] == (1, 0)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_multipoint_in_multiple_cells_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(MultiPoint([Point(1.0, 1.0), Point(12.0, 12.0)]))
assert len(result) == 2
assert result.cellids[0] == (0, 1)
assert result.cellids[1] == (1, 0)
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_point_outside(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(Point(25.0, 25.0))
assert len(result) == 0
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_point_on_outer_boundary(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(Point(20.0, 10.0))
assert len(result) == 1
assert np.all(result.cellids[0] == 0)
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_point_on_inner_boundary(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(Point(10.0, 10.0))
assert len(result) == 1
assert np.all(result.cellids[0] == 0)
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_multipoint_in_one_cell(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(MultiPoint([Point(1.0, 1.0), Point(2.0, 2.0)]))
assert len(result) == 1
assert result.cellids[0] == 1
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_multipoint_in_multiple_cells(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(MultiPoint([Point(1.0, 1.0), Point(12.0, 12.0)]))
assert len(result) == 2
assert result.cellids[0] == 0
assert result.cellids[1] == 1
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_point_on_all_vertices_return_all_ix(rtree):
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured", rtree=rtree)
n_intersections = [1, 2, 1, 2, 4, 2, 1, 2, 1]
for v, n in zip(gr.verts, n_intersections):
r = ix.intersect(Point(*v), return_all_intersections=True)
assert len(r) == n
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_point_on_all_vertices_return_all_ix_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
n_intersections = [1, 2, 1, 2, 4, 2, 1, 2, 1]
for v, n in zip(gr.verts, n_intersections):
r = ix.intersect(Point(*v), return_all_intersections=True)
assert len(r) == n
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_points_on_all_vertices_return_all_ix_shapely(rtree):
gr = get_tri_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
n_intersections = [2, 2, 2, 2, 8, 2, 2, 2, 2]
for v, n in zip(gr.verts, n_intersections):
r = ix.intersect(Point(*v), return_all_intersections=True)
assert len(r) == n
# %% test linestring structured
@requires_pkg("shapely")
def test_rect_grid_linestring_outside():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(25.0, 25.0), (21.0, 5.0)]))
assert len(result) == 0
@requires_pkg("shapely")
def test_rect_grid_linestring_in_2cells():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(5.0, 5.0), (15.0, 5.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == (1, 0)
assert result.cellids[1] == (1, 1)
@requires_pkg("shapely")
def test_rect_grid_linestring_on_outer_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(15.0, 20.0), (5.0, 20.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[1] == (0, 0)
assert result.cellids[0] == (0, 1)
@requires_pkg("shapely")
def test_rect_grid_linestring_on_inner_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(5.0, 10.0), (15.0, 10.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == (0, 0)
assert result.cellids[1] == (0, 1)
@requires_pkg("shapely")
def test_rect_grid_multilinestring_in_one_cell():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(
MultiLineString(
[LineString([(1.0, 1), (9.0, 1.0)]), LineString([(1.0, 9.0), (9.0, 9.0)])]
)
)
assert len(result) == 1
assert result.lengths == 16.0
assert result.cellids[0] == (1, 0)
@requires_pkg("shapely")
def test_rect_grid_multilinestring_in_multiple_cells():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(
MultiLineString(
[
LineString([(20.0, 0.0), (7.5, 12.0), (2.5, 7.0), (0.0, 4.5)]),
LineString([(5.0, 19.0), (2.5, 7.0)]),
]
)
)
assert len(result) == 3
assert np.allclose(sum(result.lengths), 40.19197584109293)
@requires_pkg("shapely")
def test_rect_grid_linestring_in_and_out_of_cell():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(5.0, 9), (15.0, 5.0), (5.0, 1.0)]))
assert len(result) == 2
assert result.cellids[0] == (1, 0)
assert result.cellids[1] == (1, 1)
assert np.allclose(result.lengths.sum(), 21.540659228538015)
@requires_pkg("shapely")
def test_rect_grid_linestring_in_and_out_of_cell2():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(5, 15), (5.0, 9), (15.0, 5.0), (5.0, 1.0)]))
assert len(result) == 3
@requires_pkg("shapely")
def test_rect_grid_linestrings_on_boundaries_return_all_ix():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
x, y = ix._rect_grid_to_geoms_cellids()[0][0].exterior.xy
n_intersections = [1, 2, 2, 1]
for i in range(4):
ls = LineString([(x[i], y[i]), (x[i + 1], y[i + 1])])
r = ix.intersect(ls, return_all_intersections=True)
assert len(r) == n_intersections[i]
@requires_pkg("shapely")
def test_rect_grid_linestring_starting_on_vertex():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(LineString([(10.0, 10.0), (15.0, 5.0)]))
assert len(result) == 1
assert np.allclose(result.lengths.sum(), np.sqrt(50))
assert result.cellids[0] == (1, 1)
# %% test linestring shapely
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_outside_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(LineString([(25.0, 25.0), (21.0, 5.0)]))
assert len(result) == 0
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_in_2cells_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(LineString([(5.0, 5.0), (15.0, 5.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == (1, 0)
assert result.cellids[1] == (1, 1)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_on_outer_boundary_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(LineString([(15.0, 20.0), (5.0, 20.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == (0, 0)
assert result.cellids[1] == (0, 1)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_on_inner_boundary_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(LineString([(5.0, 10.0), (15.0, 10.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == (0, 0)
assert result.cellids[1] == (0, 1)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_multilinestring_in_one_cell_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(
MultiLineString(
[LineString([(1.0, 1), (9.0, 1.0)]), LineString([(1.0, 9.0), (9.0, 9.0)])]
)
)
assert len(result) == 1
assert result.lengths == 16.0
assert result.cellids[0] == (1, 0)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_multilinestring_in_multiple_cells_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(
MultiLineString(
[
LineString([(20.0, 0.0), (7.5, 12.0), (2.5, 7.0), (0.0, 4.5)]),
LineString([(5.0, 19.0), (2.5, 7.0)]),
]
)
)
assert len(result) == 3
assert np.allclose(sum(result.lengths), 40.19197584109293)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_in_and_out_of_cell_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
result = ix.intersect(LineString([(5.0, 9), (15.0, 5.0), (5.0, 1.0)]))
assert len(result) == 2
assert result.cellids[0] == (1, 0)
assert result.cellids[1] == (1, 1)
assert np.allclose(result.lengths.sum(), 21.540659228538015)
@requires_pkg("shapely")
def test_rect_grid_linestring_in_and_out_of_cell2_shapely():
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex")
result = ix.intersect(LineString([(5, 15), (5.0, 9), (15.0, 5.0), (5.0, 1.0)]))
assert len(result) == 3
@requires_pkg("shapely")
def test_rect_grid_linestring_starting_on_vertex_shapely():
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex")
result = ix.intersect(LineString([(10.0, 10.0), (15.0, 5.0)]))
assert len(result) == 1
assert np.allclose(result.lengths.sum(), np.sqrt(50))
assert result.cellids[0] == (1, 1)
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestrings_on_boundaries_return_all_ix_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
x, y = ix._rect_grid_to_geoms_cellids()[0][0].exterior.xy
n_intersections = [1, 2, 2, 1]
for i in range(4):
ls = LineString([(x[i], y[i]), (x[i + 1], y[i + 1])])
r = ix.intersect(ls, return_all_intersections=True)
assert len(r) == n_intersections[i]
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_cell_boundary_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
ls = LineString(ix._rect_grid_to_geoms_cellids()[0][0].exterior.coords)
r = ix.intersect(ls, return_all_intersections=False)
assert len(r) == 1
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_linestring_cell_boundary_return_all_ix_shapely(rtree):
gr = get_rect_grid()
ix = GridIntersect(gr, method="vertex", rtree=rtree)
ls = LineString(ix._rect_grid_to_geoms_cellids()[0][0].exterior.coords)
r = ix.intersect(ls, return_all_intersections=True)
assert len(r) == 3
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestring_outside(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(LineString([(25.0, 25.0), (21.0, 5.0)]))
assert len(result) == 0
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestring_in_2cells(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(LineString([(5.0, 5.0), (5.0, 15.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == 1
assert result.cellids[1] == 3
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestring_on_outer_boundary(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(LineString([(15.0, 20.0), (5.0, 20.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == 2
assert result.cellids[1] == 7
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestring_on_inner_boundary(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(LineString([(5.0, 10.0), (15.0, 10.0)]))
assert len(result) == 2
assert result.lengths.sum() == 10.0
assert result.cellids[0] == 0
assert result.cellids[1] == 1
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_multilinestring_in_one_cell(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(
MultiLineString(
[LineString([(1.0, 1), (9.0, 1.0)]), LineString([(2.0, 2.0), (9.0, 2.0)])]
)
)
assert len(result) == 1
assert result.lengths == 15.0
assert result.cellids[0] == 4
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_multilinestring_in_multiple_cells(rtree):
gr = get_tri_grid()
if gr == -1:
return
ix = GridIntersect(gr, rtree=rtree)
result = ix.intersect(
MultiLineString(
[
LineString([(20.0, 0.0), (7.5, 12.0), (2.5, 7.0), (0.0, 4.5)]),
LineString([(5.0, 19.0), (2.5, 7.0)]),
]
)
)
assert len(result) == 5
assert np.allclose(sum(result.lengths), 40.19197584109293)
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestrings_on_boundaries_return_all_ix(rtree):
tgr = get_tri_grid()
ix = GridIntersect(tgr, method="vertex", rtree=rtree)
x, y = ix._vtx_grid_to_geoms_cellids()[0][0].exterior.xy
n_intersections = [2, 1, 2]
for i in range(len(x) - 1):
ls = LineString([(x[i], y[i]), (x[i + 1], y[i + 1])])
r = ix.intersect(ls, return_all_intersections=True)
assert len(r) == n_intersections[i]
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestring_cell_boundary_shapely(rtree):
tgr = get_tri_grid()
ix = GridIntersect(tgr, method="vertex", rtree=rtree)
ls = LineString(ix._vtx_grid_to_geoms_cellids()[0][0].exterior.coords)
r = ix.intersect(ls, return_all_intersections=False)
assert len(r) == 1
@requires_pkg("shapely")
@rtree_toggle
def test_tri_grid_linestring_cell_boundary_return_all_ix_shapely(rtree):
tgr = get_tri_grid()
ix = GridIntersect(tgr, method="vertex", rtree=rtree)
ls = LineString(ix._vtx_grid_to_geoms_cellids()[0][0].exterior.coords)
r = ix.intersect(ls, return_all_intersections=True)
assert len(r) == 3
@requires_pkg("shapely")
def test_rect_vertex_grid_linestring_geomcollection():
gr = get_rect_vertex_grid()
ix = GridIntersect(gr, method="vertex")
ls = LineString(
[
(20.0, 0.0),
(5.0, 5.0),
(15.0, 7.5),
(10.0, 10.0),
(5.0, 15.0),
(10.0, 19.0),
(10.0, 20.0),
]
)
result = ix.intersect(ls)
assert len(result) == 3
assert np.allclose(result.lengths.sum(), ls.length)
# %% test polygon structured
@requires_pkg("shapely")
def test_rect_grid_polygon_outside():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(Polygon([(21.0, 11.0), (23.0, 17.0), (25.0, 11.0)]))
assert len(result) == 0
@requires_pkg("shapely")
def test_rect_grid_polygon_in_2cells():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(Polygon([(2.5, 5.0), (7.5, 5.0), (7.5, 15.0), (2.5, 15.0)]))
assert len(result) == 2
assert result.areas.sum() == 50.0
@requires_pkg("shapely")
def test_rect_grid_polygon_on_outer_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(
Polygon([(20.0, 5.0), (25.0, 5.0), (25.0, 15.0), (20.0, 15.0)])
)
assert len(result) == 0
@requires_pkg("shapely")
def test_rect_grid_polygon_running_along_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(
Polygon(
[(5.0, 5.0), (5.0, 10.0), (9.0, 10.0), (9.0, 15.0), (1.0, 15.0), (1.0, 5.0)]
)
)
@requires_pkg("shapely")
def test_rect_grid_polygon_on_inner_boundary():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
result = ix.intersect(Polygon([(5.0, 10.0), (15.0, 10.0), (15.0, 5.0), (5.0, 5.0)]))
assert len(result) == 2
assert result.areas.sum() == 50.0
fig, ax = plt.subplots(1, 1, figsize=(8, 8))
gr.plot(ax=ax)
ix.plot_polygon(result, ax=ax)
# plt.show()
@requires_pkg("shapely")
def test_rect_grid_polygon_multiple_polygons():
# TODO: remove in 3.10.0
gr = get_rect_grid()
p = Polygon(
[
(0, 0),
(0, 10),
(4, 10),
(4, 0),
(6, 0),
(6, 10),
(9, 10),
(9, -1),
(0, -1),
(0, 0),
]
)
ix = GridIntersect(gr, method="structured")
result = ix.intersect(p)
fig, ax = plt.subplots(1, 1, figsize=(8, 8))
gr.plot(ax=ax)
ix.plot_polygon(result, ax=ax)
# plt.show()
@requires_pkg("shapely")
def test_rect_grid_multiple_disjoint_polygons_on_inner_boundaries():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
p1 = Polygon([(5.0, 10.0), (15.0, 10.0), (15.0, 5.0), (5.0, 5.0)])
p2 = Polygon([(5.0, 17.5), (15.0, 17.5), (15.0, 12.5), (5.0, 12.5)])
result = ix.intersect(MultiPolygon([p1, p2]))
assert len(result) == 4
assert result.areas.sum() == 100.0
fig, ax = plt.subplots(1, 1, figsize=(8, 8))
gr.plot(ax=ax)
ix.plot_polygon(result, ax=ax)
# plt.show()
@requires_pkg("shapely")
@pytest.mark.parametrize("transform", [True, False])
def test_rect_grid_polygon_reintersects_cell(transform):
# TODO: remove in 3.10.0
gr = get_rect_grid()
if transform:
gr.set_coord_info(xoff=1, yoff=1, angrot=10.5)
ix = GridIntersect(gr, method="structured")
p1 = Polygon(
[
(x, y + 3)
for x, y in [
(2.5, 2.5),
(2.5, 10.0),
(10.0, 10.0),
(10.0, 2.5),
(7.5, 2.5),
(7.5, 7.5),
(5.0, 7.5),
(5.0, 2.5),
]
]
)
p2 = Polygon([(1, 1), (1, 2), (2, 2), (2, 1)])
result = ix.intersect(MultiPolygon([p1, p2]))
assert len(result) == 4 if transform else 2
assert np.isclose(result.areas.sum(), 44.65733 if transform else 44.75)
fig, ax = plt.subplots(1, 1, figsize=(8, 8))
gr.plot(ax=ax)
ix.plot_polygon(result, ax=ax)
# plt.show()
@requires_pkg("shapely")
def test_rect_grid_multipolygon_in_one_cell():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
p1 = Polygon([(1.0, 1.0), (8.0, 1.0), (8.0, 3.0), (1.0, 3.0)])
p2 = Polygon([(1.0, 9.0), (8.0, 9.0), (8.0, 7.0), (1.0, 7.0)])
p = MultiPolygon([p1, p2])
result = ix.intersect(p)
assert len(result) == 1
assert result.areas.sum() == 28.0
@requires_pkg("shapely")
def test_rect_grid_multipolygon_in_multiple_cells():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
p1 = Polygon([(1.0, 1.0), (19.0, 1.0), (19.0, 3.0), (1.0, 3.0)])
p2 = Polygon([(1.0, 9.0), (19.0, 9.0), (19.0, 7.0), (1.0, 7.0)])
p = MultiPolygon([p1, p2])
result = ix.intersect(p)
assert len(result) == 2
assert result.areas.sum() == 72.0
@requires_pkg("shapely")
def test_rect_grid_polygon_with_hole():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, method="structured")
p = Polygon(
[(5.0, 5.0), (5.0, 15.0), (25.0, 15.0), (25.0, -5.0), (5.0, -5.0)],
holes=[[(9.0, -1), (9, 11), (21, 11), (21, -1)]],
)
result = ix.intersect(p)
assert len(result) == 3
assert result.areas.sum() == 104.0
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_polygon_contains_centroid(rtree):
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, rtree=rtree)
p = Polygon(
[(6.0, 5.0), (4.0, 16.0), (25.0, 14.0), (25.0, -5.0), (6.0, -5.0)],
holes=[[(9.0, -1), (9, 11), (21, 11), (21, -1)]],
)
result = ix.intersect(p, contains_centroid=True)
assert len(result) == 1
@requires_pkg("shapely")
@rtree_toggle
def test_rect_grid_polygon_min_area(rtree):
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr, rtree=rtree)
p = Polygon(
[(5.0, 5.0), (5.0, 15.0), (25.0, 15.0), (25.0, -5.0), (5.0, -5.0)],
holes=[[(9.0, -1), (9, 11), (21, 11), (21, -1)]],
)
result = ix.intersect(p, min_area_fraction=0.4)
assert len(result) == 2
@requires_pkg("shapely")
def test_rect_grid_polygon_centroid_and_min_area():
# TODO: remove in 3.10.0
gr = get_rect_grid()
ix = GridIntersect(gr)
p = Polygon(