Python shapely.geometry.polygon.orient() Examples

The following are 5 code examples of shapely.geometry.polygon.orient(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module shapely.geometry.polygon , or try the search function .
Example #1
Source File: encoder.py    From mapbox-vector-tile with MIT License 6 votes vote down vote up 
def enforce_polygon_winding_order(self, shape, y_coord_down, n_try):
        assert shape.type == 'Polygon'

        def fn(point):
            x, y = point
            return self._round(x), self._round(y)

        exterior = apply_map(fn, shape.exterior.coords)
        rings = None

        if len(shape.interiors) > 0:
            rings = [apply_map(fn, ring.coords) for ring in shape.interiors]

        sign = 1.0 if y_coord_down else -1.0
        oriented_shape = orient(Polygon(exterior, rings), sign=sign)
        oriented_shape = self.handle_shape_validity(
            oriented_shape, y_coord_down, n_try)
        return oriented_shape
Example #2
Source File: encoder.py    From go2mapillary with GNU General Public License v3.0 6 votes vote down vote up 
def enforce_polygon_winding_order(self, shape, y_coord_down, n_try):
        assert shape.type == 'Polygon'

        def fn(point):
            x, y = point
            return self._round(x), self._round(y)

        exterior = apply_map(fn, shape.exterior.coords)
        rings = None

        if len(shape.interiors) > 0:
            rings = [apply_map(fn, ring.coords) for ring in shape.interiors]

        sign = 1.0 if y_coord_down else -1.0
        oriented_shape = orient(Polygon(exterior, rings), sign=sign)
        oriented_shape = self.handle_shape_validity(
            oriented_shape, y_coord_down, n_try)
        return oriented_shape
Example #3
Source File: rawr.py    From tilequeue with MIT License 6 votes vote down vote up 
def _orient(shape):
    """
    The Shapely version of the orient function appears to only work on
    Polygons, and fails on MultiPolygons. This is a quick wrapper to allow
    orienting of either.
    """

    assert shape.geom_type in ('Polygon', 'MultiPolygon')

    if shape.geom_type == 'Polygon':
        return orient(shape)

    else:
        polys = []
        for geom in shape.geoms:
            polys.append(orient(geom))
        return MultiPolygon(polys)
Example #4
Source File: polygons.py    From geomeppy with MIT License 5 votes vote down vote up 
def buffer(self, distance=None, join_style=2):
        # type: (Optional[float], Optional[int]) -> Polygon2D
        """Returns a representation of all points within a given distance of the polygon.

        :param join_style: The styles of joins between offset segments: 1 (round), 2 (mitre), and 3 (bevel).

        """
        s_poly = SPoly(self.vertices)
        core = orient(s_poly.buffer(distance=distance, join_style=join_style), sign=1.0)
        return Polygon2D(core.boundary.coords)
Example #5
Source File: fiona_dataset.py    From Processing with MIT License 5 votes vote down vote up 
def _force_polygon_ccw(geometry):
    polygon = shape(geometry)
    return mapping(orient(polygon))