tms_image.py 文件源码

def _tile_coords(self, bounds):
        """ Convert tile coords mins/maxs to lng/lat bounds """
        tfm = partial(pyproj.transform,
                      pyproj.Proj(init="epsg:3857"),
                      pyproj.Proj(init="epsg:4326"))
        bounds = ops.transform(tfm, box(*bounds)).bounds
        params = list(bounds) + [[self.zoom_level]]
        tile_coords = [(tile.x, tile.y) for tile in mercantile.tiles(*params)]
        xtiles, ytiles = zip(*tile_coords)
        minx = min(xtiles)
        maxx = max(xtiles)
        miny = min(ytiles)
        maxy = max(ytiles)
        return minx, miny, maxx, maxy