def _tile_at(point, zoom):
"""Return the map tile located at the given point in Spherical
Mercator coordinates with the specified zoom level.
"""
point = PyGeoPoint.from_meters(point[0], point[1])
tile = PyGeoTile.for_point(point, zoom)
return tile.google
def test_for_point(chicago_latitude_longitude, chicago_zoom, chicago_tms):
latitude, longitude = chicago_latitude_longitude
point = Point.from_latitude_longitude(latitude=latitude,
longitude=longitude)
tile = Tile.for_point(point=point, zoom=chicago_zoom)
assert tile.tms == chicago_tms
assert tile.zoom == chicago_zoom
def _tiles_from_bbox(bbox, zoom_level):
"""
* Returns all tiles for the specified bounding box
"""
if isinstance(bbox, dict):
point_min = Point.from_latitude_longitude(latitude=bbox['tl'],
longitude=bbox['tr'])
point_max = Point.from_latitude_longitude(latitude=bbox['bl'],
longitude=bbox['br'])
elif isinstance(bbox, list):
point_min = Point.from_latitude_longitude(latitude=bbox[1],
longitude=bbox[0])
point_max = Point.from_latitude_longitude(latitude=bbox[3],
longitude=bbox[2])
else:
raise RuntimeError("bbox must bei either a dict or a list")
tile_min = Tile.for_point(point_min, zoom_level)
tile_max = Tile.for_point(point_max, zoom_level)
tiles = []
for x in range(tile_min.tms_x, tile_max.tms_x + 1):
for y in range(tile_min.tms_y, tile_max.tms_y + 1):
tiles.append(Tile.from_tms(tms_x=x, tms_y=y, zoom=zoom_level))
return tiles