utils.py 文件源码

def coords_for(name):
    geocoder = Nominatim()
    location = geocoder.geocode(name, geometry='geojson')

    try:
        geometry = shape(location.raw['geojson'])

        # Coordinates have to be flipped in order to work in overpass
        if geometry.geom_type == 'Polygon':
            west, south, east, north = geometry.bounds
            return BoundingBox(south, west, north, east)
        elif geometry.geom_type == 'MultiPolygon':
            bboxs = (BoundingBox(*(g.bounds[0:2][::-1] + g.bounds[2:][::-1]))
                     for g in geometry)
            return bboxs
        elif geometry.geom_type == 'Point':
            south, north, west, east = (float(coordinate)
                                        for coordinate in
                                        location.raw['boundingbox'])
            return BoundingBox(south, west, north, east)

    except (KeyError, AttributeError):
        raise AttributeError(
            'No bounding box available for this location name.')