def getMetadata(self):
response = util.fetchJson("%s?key=%s" % (self.metadataPath, self.bingMapsKey))
if "errorDetails" not in response:
data = response["resourceSets"][0]["resources"][0]
self.tileWidth = data["imageWidth"]
self.tileHeight = data["imageHeight"]
self.imageUrl = data["imageUrl"]
self.imageUrlSubdomains = data["imageUrlSubdomains"]
self.zoomMax = data["zoomMax"]
self.numSubdomains = len(self.imageUrlSubdomains)
else:
logging.error("Unknown response from the server")
sys.exit(-1)
def getMaxZoom(self, bbox):
(bottom, left) = util.toSphMercator(bbox[1], bbox[0])
(top, right) = util.toSphMercator(bbox[3], bbox[2])
(centerY, centerX) = util.toGeographic((top+bottom)/2, (left+right)/2)
zoom = self.zoomMax
while True:
response = util.fetchJson("%s/%s,%s?zl=%s&key=%s" % (self.metadataPath, centerY, centerX, zoom, self.bingMapsKey))
if "errorDetails" not in response:
data = response["resourceSets"][0]["resources"][0]
if data["vintageEnd"]: break
else:
logging.error("Unknown response from the server")
sys.exit(-1)
zoom = zoom-1
return zoom
