def encode(latitude, longitude, precision=12):
if latitude >= 90.0 or latitude < -90.0:
raise Exception("invalid latitude.")
while longitude < -180.0:
longitude += 360.0
while longitude >= 180.0:
longitude -= 360.0
if _geohash:
basecode = _geohash.encode(latitude, longitude)
if len(basecode) > precision:
return basecode[0:precision]
return basecode + '0' * (precision - len(basecode))
lat = latitude / 180.0
lon = longitude / 360.0
xprecision = precision + 1
lat_length = lon_length = xprecision * 5 / 2
if xprecision % 2 == 1:
lon_length += 1
if lat > 0:
lat = int((1 << lat_length) * lat) + (1 << (lat_length - 1))
else:
lat = (1 << lat_length - 1) - int((1 << lat_length) * (-lat))
if lon > 0:
lon = int((1 << lon_length) * lon) + (1 << (lon_length - 1))
else:
lon = (1 << lon_length - 1) - int((1 << lon_length) * (-lon))
return _encode_i2c(lat, lon, lat_length, lon_length)[:precision]
def encode(latitude, longitude, precision=12):
if latitude >= 90.0 or latitude < -90.0:
raise Exception("invalid latitude.")
while longitude < -180.0:
longitude += 360.0
while longitude >= 180.0:
longitude -= 360.0
if _geohash:
basecode=_geohash.encode(latitude,longitude)
if len(basecode)>precision:
return basecode[0:precision]
return basecode+'0'*(precision-len(basecode))
lat = latitude/180.0
lon = longitude/360.0
xprecision=precision+1
lat_length = lon_length = int(xprecision*5/2)
if xprecision%2==1:
lon_length+=1
if lat>0:
lat = int((1<<lat_length)*lat)+(1<<(lat_length-1))
else:
lat = (1<<lat_length-1)-int((1<<lat_length)*(-lat))
if lon>0:
lon = int((1<<lon_length)*lon)+(1<<(lon_length-1))
else:
lon = (1<<lon_length-1)-int((1<<lon_length)*(-lon))
return _encode_i2c(lat,lon,lat_length,lon_length)[:precision]
def encode(latitude, longitude, precision=12):
if latitude > 90.0 or latitude < -90.0:
raise Exception("invalid latitude.")
while longitude < -180.0:
longitude += 360.0
while longitude >= 180.0:
longitude -= 360.0
if _geohash:
basecode = _geohash.encode(latitude, longitude)
if len(basecode) > precision:
return basecode[0:precision]
return basecode + "0" * (precision - len(basecode))
lat = (latitude + 90.0) / 180.0
lon = (longitude + 180.0) / 360.0
lat_length = lon_length = precision * 5 / 2
if precision % 2 == 1:
lon_length += 1
lat = int((1 << lat_length) * lat)
lon = int((1 << lon_length) * lon)
return _encode_i2c(lat, lon, lat_length, lon_length)
def _get_cache_key(self, **kwargs):
"""
Generates a valid cache key with a geohash.
the geohash square is approximately 20 m
"""
key = 'cartodb_%s_' % _geohash.encode(
kwargs.pop('lat'), kwargs.pop('lon'))[:8]
key += '_'.join([
'%s=%s' % (k, kwargs[k]) for k in sorted(kwargs.iterkeys())])
return key
def _get_cache_key(self, **kwargs):
"""
Generates a valid cache key with a geohash.
the geohash square is approximately 20 m
"""
key = 'cartodb_%s_' % _geohash.encode(kwargs.pop('lat'),
kwargs.pop('lon'))[:8]
key += '_'.join(
['%s=%s' % (k, kwargs[k]) for k in sorted(kwargs.iterkeys())])
return key
def encode(latitude, longitude, precision=12):
# Check Latitude
if latitude > 90.0 or latitude < -90.0:
raise Exception("invalid latitude.")
# Wrap Longitude
while longitude < -180.0:
longitude += 360.0
while longitude >= 180.0:
longitude -= 360.0
if _geohash:
basecode=_geohash.encode(latitude,longitude)
if len(basecode)>precision:
return basecode[0:precision]
return basecode+'0'*(precision-len(basecode))
xprecision=precision+1
lat_length = lon_length = int(xprecision*5/2)
if xprecision%2==1:
lon_length+=1
if hasattr(float, "fromhex"):
a = _float_hex_to_int(latitude/90.0)
o = _float_hex_to_int(longitude/180.0)
if a[1] > lat_length:
ai = a[0]>>(a[1]-lat_length)
else:
ai = a[0]<<(lat_length-a[1])
if o[1] > lon_length:
oi = o[0]>>(o[1]-lon_length)
else:
oi = o[0]<<(lon_length-o[1])
return _encode_i2c(ai, oi, lat_length, lon_length)[:precision]
lat = latitude/180.0
lon = longitude/360.0
if lat>0:
lat = int((1<<lat_length)*lat)+(1<<(lat_length-1))
else:
lat = (1<<lat_length-1)-int((1<<lat_length)*(-lat))
if lon>0:
lon = int((1<<lon_length)*lon)+(1<<(lon_length-1))
else:
lon = (1<<lon_length-1)-int((1<<lon_length)*(-lon))
return _encode_i2c(lat,lon,lat_length,lon_length)[:precision]
def encode(latitude, longitude, precision=12):
if latitude >= 90.0 or latitude < -90.0:
raise Exception("invalid latitude.")
while longitude < -180.0:
longitude += 360.0
while longitude >= 180.0:
longitude -= 360.0
if _geohash:
basecode = _geohash.encode(latitude, longitude)
if len(basecode) > precision:
return basecode[0:precision]
return basecode + '0' * (precision - len(basecode))
xprecision = precision + 1
lat_length = lon_length = int(xprecision * 5 / 2)
if xprecision % 2 == 1:
lon_length += 1
if hasattr(float, "fromhex"):
a = _float_hex_to_int(latitude / 90.0)
o = _float_hex_to_int(longitude / 180.0)
if a[1] > lat_length:
ai = a[0] >> (a[1] - lat_length)
else:
ai = a[0] << (lat_length - a[1])
if o[1] > lon_length:
oi = o[0] >> (o[1] - lon_length)
else:
oi = o[0] << (lon_length - o[1])
return _encode_i2c(ai, oi, lat_length, lon_length)[:precision]
lat = latitude / 180.0
lon = longitude / 360.0
if lat > 0:
lat = int((1 << lat_length) * lat) + (1 << (lat_length - 1))
else:
lat = (1 << lat_length - 1) - int((1 << lat_length) * (-lat))
if lon > 0:
lon = int((1 << lon_length) * lon) + (1 << (lon_length - 1))
else:
lon = (1 << lon_length - 1) - int((1 << lon_length) * (-lon))
return _encode_i2c(lat, lon, lat_length, lon_length)[:precision]
def encode(*args): return _geohash.encode(*args)
