我们从Python开源项目中，提取了以下23个代码示例，用于说明如何使用django.contrib.gis.geos.LinearRing()。
def tile(self, lonlat, zoom): """ Returns a Polygon corresponding to the region represented by a fictional Google Tile for the given longitude/latitude pair and zoom level. This tile is used to determine the size of a tile at the given point. """ # The given lonlat is the center of the tile. delta = self._tilesize / 2 # Getting the pixel coordinates corresponding to the # the longitude/latitude. px = self.lonlat_to_pixel(lonlat, zoom) # Getting the lower-left and upper-right lat/lon coordinates # for the bounding box of the tile. ll = self.pixel_to_lonlat((px[0] - delta, px[1] - delta), zoom) ur = self.pixel_to_lonlat((px[0] + delta, px[1] + delta), zoom) # Constructing the Polygon, representing the tile and returning. return Polygon(LinearRing(ll, (ll[0], ur[1]), ur, (ur[0], ll[1]), ll), srid=4326)
def tile(self, lonlat, zoom): """ Returns a Polygon corresponding to the region represented by a fictional Google Tile for the given longitude/latitude pair and zoom level. This tile is used to determine the size of a tile at the given point. """ # The given lonlat is the center of the tile. delta = self._tilesize / 2 # Getting the pixel coordinates corresponding to the # the longitude/latitude. px = self.lonlat_to_pixel(lonlat, zoom) # Getting the lower-left and upper-right lat/lon coordinates # for the bounding box of the tile. ll = self.pixel_to_lonlat((px[0]-delta, px[1]-delta), zoom) ur = self.pixel_to_lonlat((px[0]+delta, px[1]+delta), zoom) # Constructing the Polygon, representing the tile and returning. return Polygon(LinearRing(ll, (ll[0], ur[1]), ur, (ur[0], ll[1]), ll), srid=4326)
def __init__(self, geom, color='#0000ff', weight=2, opacity=1): """ The GPolyline object may be initialized on GEOS LineStirng, LinearRing, and Polygon objects (internal rings not supported) or a parameter that may instantiated into one of the above geometries. Keyword Options: color: The color to use for the polyline. Defaults to '#0000ff' (blue). weight: The width of the polyline, in pixels. Defaults to 2. opacity: The opacity of the polyline, between 0 and 1. Defaults to 1. """ # If a GEOS geometry isn't passed in, try to contsruct one. if isinstance(geom, six.string_types): geom = fromstr(geom) if isinstance(geom, (tuple, list)): geom = Polygon(geom) # Generating the lat/lng coordinate pairs. if isinstance(geom, (LineString, LinearRing)): self.latlngs = self.latlng_from_coords(geom.coords) elif isinstance(geom, Polygon): self.latlngs = self.latlng_from_coords(geom.shell.coords) else: raise TypeError('GPolyline may only initialize on GEOS LineString, LinearRing, and/or Polygon geometries.') # Getting the envelope for automatic zoom determination. self.envelope = geom.envelope self.color, self.weight, self.opacity = color, weight, opacity super(GPolyline, self).__init__()
