def get(self, zoom, tx, ty):
try:
zoom = int(zoom)
tx = int(tx)
ty = int(ty)
except ValueError:
self.set_status(400)
return self.render()
# short-circuit return from cache
cache_key = self.message.path
payload = cache.get(cache_key)
if payload is None:
payload = generate_tile(zoom, tx, ty)
if payload is None:
payload = '' # mark empty payloads in the cache
cache.set(cache_key, payload)
if len(payload) == 0:
logging.warn('empty payload')
self.set_status(204)
else:
self.headers['Content-Type'] = 'image/jpeg'
self.set_body(payload)
self.headers['Access-Control-Allow-Origin'] = '*'
return self.render()
return HeatTile.CBK[zoom] + (0.5 * math.log((1 + inner) / (1 - inner)) * (-HeatTile.CFK[zoom]))
# Warm up the server by loading up all our tiles
# Work through the different zoom levels we allow
for zoom in xrange(12, 13):
# Determine the x min tile, x max tile, y min tile, and y max tile
X_MIN_TILE = int(x_from_zoom(zoom, MIN_LON) / TILE_SIZE)
X_MAX_TILE = int(x_from_zoom(zoom, MAX_LON) / TILE_SIZE)
Y_MIN_TILE = int(y_from_zoom(zoom, MAX_LAT) / TILE_SIZE)
Y_MAX_TILE = int(y_from_zoom(zoom, MIN_LAT) / TILE_SIZE)
for x in xrange(X_MIN_TILE, X_MAX_TILE + 1):
for y in xrange(Y_MIN_TILE, Y_MAX_TILE + 1):
jpeg = generate_tile(zoom, x, y)
if jpeg is None:
#print("Empty tile z%s x%s y%s" % (zoom, x, y))
pass
else:
z_path = SEP.join([OUT_DIR, str(zoom)])
y_path = SEP.join([OUT_DIR, str(zoom), str(y)])
jpg_path = SEP.join([OUT_DIR, str(zoom), str(y), str(x) + '.jpg'])
if not os.path.isdir(z_path):
os.mkdir(z_path)
if not os.path.isdir(y_path):
os.mkdir(y_path)
print("Saving tile z%s x%s y%s: %s" % (zoom, x, y, len(jpeg)))
f = open(jpg_path, 'w')
f.write(jpeg)