def get_slr(self):
"""Extract SLR for any geometries that overlap bounds where SLR is available
Returns
-------
dict
{"slr_acres": <acres>, "slr": [<slr_0ft>, <slr_1ft>, ..., <slr_6ft>]}
"""
slr_bounds = gp.read_feather(
slr_bounds_filename).geometry.values.data[0]
ix = pg.intersects(self.geometry, slr_bounds)
if not ix.sum():
# No overlap
return None
# only extract SLR where there are overlaps
slr_results = extract_slr_by_geometry(self.shapes[ix],
bounds=pg.total_bounds(
self.geometry[ix]))
# None only if no shape mask
if slr_results is None:
return None
slr = [slr_results[i] for i in range(7)]
return {"slr_acres": slr_results["shape_mask"], "slr": slr}
def _valid_hull(geoms, points):
"""Sanity check within ``alpha_shape_auto()`` to verify the generated alpha
shape actually contains the original set of points (xys).
Parameters
----------
geoms : GeoSeries
See alpha_geoms()
points : list
xys parameter cast as shapely.geometry.Point objects
Returns
-------
flag : bool
Valid hull for alpha shape [True] or not [False]
"""
flag = True
# if there is not exactly one polygon
if geoms.shape[0] != 1:
return False
# if any (xys) points do not intersect the polygon
if HAS_PYGEOS:
return pygeos.intersects(pygeos.from_shapely(geoms[0]), points).all()
else:
for point in points:
if not point.intersects(geoms[0]):
return False
return True
def get_slr(self):
slr_bounds = gp.read_feather(
slr_bounds_filename).geometry.values.data[0]
ix = pg.intersects(self.geometry, slr_bounds)
if not ix.sum():
# No overlap
return None
# only extract SLR where there are overlaps
slr_results = extract_slr_by_geometry(self.shapes[ix],
bounds=pg.total_bounds(
self.geometry[ix]))
# None only if no shape mask
if slr_results is None:
return None
slr = [slr_results[i] for i in range(7)]
return {"slr_acres": slr_results["shape_mask"], "slr": slr}
def _pandas(cls, column, **kwargs):
shape = kwargs.get("shape")
shape_format = kwargs.get("shape_format")
column_shape_format = kwargs.get("column_shape_format")
# Check that shape is given and given in the correct format
if shape is not None:
try:
if shape_format == "wkt":
shape_ref = geos.from_wkt(shape)
elif shape_format == "wkb":
shape_ref = geos.from_wkb(shape)
elif shape_format == "geojson":
shape_ref = geos.from_geojson(shape)
else:
raise NotImplementedError(
"Shape constructor method not implemented. Must be in WKT, WKB, or GeoJSON format."
)
except:
raise Exception("A valid reference shape was not given.")
else:
raise Exception("A shape must be provided for this method.")
# Load the column into a pygeos Geometry vector from numpy array (Series not supported).
if column_shape_format == "wkt":
shape_test = geos.from_wkt(column.to_numpy(), on_invalid="ignore")
elif column_shape_format == "wkb":
shape_test = geos.from_wkb(column.to_numpy(), on_invalid="ignore")
else:
raise NotImplementedError(
"Column values shape format not implemented.")
# Allow for an array of reference shapes to be provided. Return a union of all the shapes in the array (Polygon or Multipolygon)
shape_ref = geos.union_all(shape_ref)
# Prepare the geometries
geos.prepare(shape_ref)
geos.prepare(shape_test)
return pd.Series(geos.intersects(shape_ref, shape_test))
def get_results(self):
sa_bnd = gp.read_feather(boundary_filename)
# if area of interest does not intersect SA boundary, there will be no results
if not pg.intersects(self.geometry, sa_bnd.geometry.values.data).max():
return None
results = {
"type": "",
"acres": pg.area(self.geometry).sum() * M2_ACRES,
"name": self.name,
}
blueprint_results = self.get_blueprint()
if blueprint_results is None:
return None
results.update(blueprint_results)
urban_results = self.get_urban()
if urban_results is not None:
results.update(urban_results)
slr_results = self.get_slr()
if slr_results is not None:
results.update(slr_results)
ownership_results = self.get_ownership()
if ownership_results is not None:
results.update(ownership_results)
county_results = self.get_counties()
if county_results is not None:
results.update(county_results)
parca_results = self.get_parca()
if parca_results is not None:
results.update(parca_results)
return results
# Now can just reduce dams back to these lineIDs
dams = (
dams[["damID", "geometry"]]
.join(downstreams, on="damID", how="inner")
.drop_duplicates(subset=["damID", "lineID"])
.join(flowlines.geometry.rename("flowline"), on="lineID",)
.reset_index(drop=True)
)
print(f"Found {len(dams):,} joins between NHD dams and flowlines")
### Extract representative point
# Look at either end of overlapping line and use that as representative point.
# Otherwise intersect and extract first coordinate of overlapping line
last_pt = pg.get_point(dams.flowline.values.data, -1)
ix = pg.intersects(dams.geometry.values.data, last_pt)
dams.loc[ix, "pt"] = last_pt[ix]
# override with upstream most point when both intersect
first_pt = pg.get_point(dams.flowline.values.data, 0)
ix = pg.intersects(dams.geometry.values.data, first_pt)
dams.loc[ix, "pt"] = first_pt[ix]
ix = dams.pt.isnull()
# WARNING: this might fail for odd intersection geoms; we always take the first line
# below
pt = pd.Series(
pg.get_point(
pg.get_geometry(
pg.intersection(
dams.loc[ix].geometry.values.data, dams.loc[ix].flowline.values.data
def find_dam_face_from_waterbody(waterbody, drain_pt):
total_area = pg.area(waterbody)
ring = pg.get_exterior_ring(pg.normalize(waterbody))
total_length = pg.length(ring)
num_pts = pg.get_num_points(ring) - 1 # drop closing coordinate
vertices = pg.get_point(ring, range(num_pts))
### Extract line segments that are no more than 1/3 coordinates of polygon
# starting from the vertex nearest the drain
# note: lower numbers are to the right
tree = pg.STRtree(vertices)
ix = tree.nearest(drain_pt)[1][0]
side_width = min(num_pts // 3, MAX_SIDE_PTS)
left_ix = ix + side_width
right_ix = ix - side_width
# extract these as a left-to-write line;
pts = vertices[max(right_ix, 0):min(num_pts, left_ix)][::-1]
if left_ix >= num_pts:
pts = np.append(vertices[0:left_ix - num_pts][::-1], pts)
if right_ix < 0:
pts = np.append(pts, vertices[num_pts + right_ix:num_pts][::-1])
coords = pg.get_coordinates(pts)
if len(coords) > 2:
# first run a simplification process to extract the major shape and bends
# then run the straight line algorithm
simp_coords, simp_ix = simplify_vw(
coords, min(MAX_SIMPLIFY_AREA, total_area / 100))
if len(simp_coords) > 2:
keep_coords, ix = extract_straight_segments(
simp_coords, max_angle=MAX_STRAIGHT_ANGLE, loops=5)
keep_ix = simp_ix.take(ix)
else:
keep_coords = simp_coords
keep_ix = simp_ix
else:
keep_coords = coords
keep_ix = np.arange(len(coords))
### Calculate the length of each run and drop any that are not sufficiently long
lengths = segment_length(keep_coords)
ix = (lengths >= MIN_DAM_WIDTH) & (lengths / total_length <
MAX_WIDTH_RATIO)
pairs = np.dstack([keep_ix[:-1][ix], keep_ix[1:][ix]])[0]
# since ranges are ragged, we have to do this in a loop instead of vectorized
segments = []
for start, end in pairs:
segments.append(pg.linestrings(coords[start:end + 1]))
segments = np.array(segments)
# only keep the segments that are close to the drain
segments = segments[
pg.intersects(segments, pg.buffer(drain_pt, MAX_DRAIN_DIST)), ]
if not len(segments):
return segments
# only keep those where the drain is interior to the line
pos = pg.line_locate_point(segments, drain_pt)
lengths = pg.length(segments)
ix = (pos >= MIN_INTERIOR_DIST) & (pos <= (lengths - MIN_INTERIOR_DIST))
return segments[ix]
def create_mosaic(
dataset_list: Tuple,
minzoom: int = None,
maxzoom: int = None,
max_threads: int = 20,
minimum_tile_cover: float = None,
tile_cover_sort: bool = False,
version: str = "0.0.2",
quiet: bool = True,
) -> Dict:
"""
Create mosaic definition content.
Attributes
----------
dataset_list : tuple or list, required
Dataset urls.
minzoom: int, optional
Force mosaic min-zoom.
maxzoom: int, optional
Force mosaic max-zoom.
minimum_tile_cover: float, optional (default: 0)
Filter files with low tile intersection coverage.
tile_cover_sort: bool, optional (default: None)
Sort intersecting files by coverage.
max_threads : int
Max threads to use (default: 20).
version: str, optional
mosaicJSON definition version
quiet: bool, optional (default: True)
Mask processing steps.
Returns
-------
mosaic_definition : dict
Mosaic definition.
"""
if version not in ["0.0.1", "0.0.2"]:
raise Exception(f"Invalid mosaicJSON's version: {version}")
if not quiet:
click.echo("Get files footprint", err=True)
results = get_footprints(dataset_list,
max_threads=max_threads,
quiet=quiet)
if minzoom is None:
minzoom = list(set([feat["properties"]["minzoom"]
for feat in results]))
if len(minzoom) > 1:
warnings.warn("Multiple MinZoom, Assets different minzoom values",
UserWarning)
minzoom = max(minzoom)
if maxzoom is None:
maxzoom = list(set([feat["properties"]["maxzoom"]
for feat in results]))
if len(maxzoom) > 1:
warnings.warn(
"Multiple MaxZoom, Assets have multiple resolution values",
UserWarning)
maxzoom = max(maxzoom)
quadkey_zoom = minzoom
datatype = list(set([feat["properties"]["datatype"] for feat in results]))
if len(datatype) > 1:
raise Exception("Dataset should have the same data type")
if not quiet:
click.echo(f"Get quadkey list for zoom: {quadkey_zoom}", err=True)
tiles = burntiles.burn(results, quadkey_zoom)
tiles = ["{2}-{0}-{1}".format(*tile.tolist()) for tile in tiles]
bounds = burntiles.find_extrema(results)
mosaic_definition = dict(
mosaicjson=version,
minzoom=minzoom,
maxzoom=maxzoom,
bounds=bounds,
center=[(bounds[0] + bounds[2]) / 2, (bounds[1] + bounds[3]) / 2,
minzoom],
tiles={},
version="1.0.0",
)
if version == "0.0.2":
mosaic_definition.update(dict(quadkey_zoom=quadkey_zoom))
if not quiet:
click.echo(f"Feed Quadkey index", err=True)
dataset_geoms = polygons(
[feat["geometry"]["coordinates"][0] for feat in results])
dataset = [{
"path": f["properties"]["path"],
"geometry": geom
} for (f, geom) in zip(results, dataset_geoms)]
for parent in tiles:
z, x, y = list(map(int, parent.split("-")))
parent = mercantile.Tile(x=x, y=y, z=z)
quad = mercantile.quadkey(*parent)
tile_geometry = polygons(
mercantile.feature(parent)["geometry"]["coordinates"][0])
fdataset = [
dataset[idx] for idx in numpy.nonzero(
intersects(tile_geometry, dataset_geoms))[0]
]
if minimum_tile_cover is not None or tile_cover_sort:
fdataset = _filter_and_sort(
tile_geometry,
fdataset,
minimum_cover=minimum_tile_cover,
sort_cover=tile_cover_sort,
)
if len(fdataset):
mosaic_definition["tiles"][quad] = [f["path"] for f in fdataset]
return mosaic_definition
downstreams = (lines_by_dam.apply(find_downstreams).reset_index().explode(
"lineID").drop_duplicates().set_index("id").lineID)
# Now can just reduce dams back to these lineIDs
dams = (dams[["id", "GNIS_Name", "geometry"]].join(
downstreams, on="id",
how="inner").drop_duplicates(subset=["id", "lineID"]).join(
flowlines.geometry.rename("line"),
on="lineID").reset_index(drop=True))
print("Found {:,} joins between NHD dams and flowlines".format(len(dams)))
### Extract representative point
# Look at either end of overlapping line and use that as representative point.
# Otherwise intersect and extract first coordinate of overlapping line
first = pg.get_point(dams.line, 0)
intersects_first = pg.intersects(dams.geometry, first)
ix = intersects_first
dams.loc[ix, "pt"] = first.loc[ix]
ix = ~intersects_first
last = pg.get_point(dams.loc[ix].line, -1)
intersects_last = pg.intersects(dams.loc[ix].geometry, last)
last = last.loc[intersects_last]
dams.loc[last.index, "pt"] = last
ix = dams.pt.isnull()
# WARNING: this might fail for odd intersection geoms
pt = pg.get_point(
pg.intersection(dams.loc[ix].geometry, dams.loc[ix].line), 0).dropna()
dams.loc[pt.index, "pt"] = pt
