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shapefiles.py
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shapefiles.py
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import OceanPy as op
import pyproj
import shapefile
import shapely.geometry as slgeo
import matplotlib.patches as mplpatch
class Shapefile(object):
shpfile = ''
def __init__(self, shpfile=None, projin=None, projout=None, pathwrite=None, zaxis=False):
self.shpfile = shpfile
self.projin = projin
self.projout = projout
# self.pathwrite = pathwrite
self.get_coords(zaxis=zaxis)
# self.get_patch()
def read_shpfile(self):
try:
self.reader = shapefile.Reader(self.shpfile)
except shapefile.ShapefileException:
self.reader = self.shpfile
def get_coords(self, zaxis):
self.read_shpfile()
self.coordinates = []
for shape in self.reader.shapes():
if all([len(x) > 2 for x in shape.points]) and zaxis:
for point in shape.points:
if self.projin is not None and self.projout is not None:
self.coordinates.append(pyproj.transform(self.projin, self.projout, point[0], point[1]) + (point[2],))
else:
self.coordinates.append((point[0], point[1], point[2]))
else:
for point in shape.points:
if self.projin is not None and self.projout is not None:
self.coordinates.append(pyproj.transform(self.projin, self.projout, point[0], point[1]))
else:
self.coordinates.append((point[0], point[1]))
def transform_shapes(self):
if self.reader.shapeType == 1:
pass
elif self.reader.shapeType == 3:
self.writer = shapefile.Writer(shapeType=3)
for shape in self.reader.shapes():
for point in shape.points:
x, y = pyproj.transform(self.projin, self.projout, point[0], point[1])
self.writer.point(x, y)
elif self.reader.shapeType == 5:
self.writer = shapefile.Writer(shapefile.POLYGON)
for shape in self.reader.shapes():
points = shape.points
poly = []
for point in points:
poly.append(list(pyproj.transform(self.projin, self.projout, point[0], point[1])))
self.writer.poly(parts=[poly])
return self.writer
# def write_shpfile(self, ):
# if self.reader.shape
# # self.reader
# # self.save(pathwrite)
def write_shpfile(shapeType=1, coords=None, poly_parts=None, path=None):
shpfile = shapefile.Writer(shapeType=shapeType)
if shapeType == 1:
for coord in coords:
if len(coord) == 2:
shpfile.point(coord[0], coord[1])
else:
shpfile.point(coord[0], coord[1], coord[2])
elif shapeType == 5:
shpfile.field('ID', 'C', '40')
for (id, part) in enumerate(poly_parts):
shpfile.poly(parts=part)
shpfile.record(str(id))
if path is not None:
shpfile.save(path)
return shpfile
def shapes_in_polygons(shpfile_shapes, shpfile_polygons, zaxis=False):
if shpfile_shapes.shapeType == 1 or shpfile_shapes.shapeType == 3:
shapes = shapefile.Writer(shapeType=shpfile_shapes.shapeType)
if len(shpfile_shapes.fields) > 0:
for field in shpfile_shapes.fields:
shapes.field(field[0], field[1], field[2], field[3])
for i, shape in enumerate(shpfile_shapes.shapes()):
point = slgeo.Point(shape.points[0])
for poly in shpfile_polygons.shapes():
if all([len(x) > 2 for x in poly.points]):
poly = [[x, y] for x, y, _, _ in poly.points]
if slgeo.Polygon(poly).contains(point):
if zaxis:
shapes.point(x=shape.points[0][0], y=shape.points[0][1], z=shape.points[0][2])
else:
shapes.point(x=shape.points[0][0], y=shape.points[0][1])
if isinstance(shpfile_shapes.records, list) is False:
shapes.records.append(shpfile_shapes.records()[i])
elif slgeo.Polygon(poly.points[0]).contains(point):
if zaxis:
shapes.point(x=shape.points[0][0], y=shape.points[0][1], z=shape.points[0][2])
else:
shapes.point(x=shape.point[0][0], y=shape.point[0][1])
if isinstance(shpfile_shapes.records, list) is False:
shapes.records.append(shpfile_shapes.records()[i])
for s in shapes.shapes():
s.shapeType = shpfile_shapes.shapeType
return shapes
else:
pass
# if shpfile_shapes.shapeType == 1 or shpfile_shapes.shapeType == 3:
# shapes = shapefile.Writer(shapeType=shpfile_shapes.shapeType)
# if len(shpfile_shapes.fields) > 0:
# for field in shpfile_shapes.fields:
# shapes.field(field[0], field[1], field[2], field[3])
#
# for i, shape in enumerate(shpfile_shapes.shapes()):
# point = slgeo.Point(shape.points[0])
# for poly in shpfile_polygons.shapes():
# if all([len(x) > 2 for x in poly.points]):
# poly = [[x, y] for x, y, _, _ in poly.points]
# if slgeo.Polygon(poly).contains(point):
# shapes.point(x=shape.points[0][0], y=shape.points[0][1])
# if isinstance(shpfile_shapes.records, list) is False:
# shapes.record(shpfile_shapes.records()[i])
# elif slgeo.Polygon(poly.points[0]).contains(point):
# shapes.point(x=shape.point[0][0], y=shape.point[0][1])
#
# for s in shapes.shapes():
# s.shapeType = shpfile_shapes.shapeType
#
# if path is not None:
# shapes.save(path)
#
# return shapes
# else:
# pass
# def get_patches(self):
# if self.reader.shapeType == 5 or self.writer.shapeType == 5:
# self.read_shpfile()
# patches = []
# if self.projin is not None and self.projout is not None:
# self.transform_shapes()
# for shape in self.writer.shapes():
# if all([len(x) > 2 for x in shape.points]):
# poly = [[x, y] for x, y, _, _ in shape.points]
# patches.append(mplpatch.Polygon(poly, closed=True, fill=False))
# else:
# patches.append(mplpatch.Polygon(shape.points))
# else:
# for shape in self.reader.shapes():
# patches.append(mplpatch.Polygon(shape.points))
# return patches
# else:
# pass
# def get_patches(self):
# if self.reader.shapeType == 5 or self.writer.shapeType == 5:
# self.read_shpfile()
# patches = []
# if self.projin is not None and self.projout is not None:
# self.transform_shapes()
# for shape in self.writer.shapes():
# if all([len(x) > 2 for x in shape.points]):
# poly = [[x, y] for x, y, _, _ in shape.points]
# patches.append(mplpatch.Polygon(poly, closed=True, fill=False))
# else:
# patches.append(mplpatch.Polygon(shape.points))
# else:
# for shape in self.reader.shapes():
# patches.append(mplpatch.Polygon(shape.points))
# return patches
# else:
# pass
# def coords_in_polygon(shpfile_points, shpfile_polygons, projection=None):
#
# coords = []
#
# try:
# sf_points = shapefile.Reader(shpfile_points)
# sf_polygons = shapefile.Reader(shpfile_polygons)
# except shapefile.ShapefileException:
# sf_points = shpfile_points
# sf_polygons = shpfile_polygons
#
# for shape in sf_points.shapes():
# if projection is not None:
# x, y = shape.points[0]
# point = Point(pyproj.transform(projection, op.WGS84, x, y))
# else:
# point = Point(shape.points[0])
# for poly in sf_polygons.shapes():
# if all([len(x) > 2 for x in poly.points]):
# poly = [[x, y] for x, y, _, _ in poly.points]
# if Polygon(poly).contains(point):
# coords.append(point.coords[0])
# elif Polygon(poly.points[0]).contains(point):
# coords.append(point.coords[0])
# return coords