text: # From https://github.com/hicsail/polyline
  #
  # ! osrm uses lon, lat order, code adapted for that !
  #
  # Copyright (c) 2014 Bruno M. Custódio
  # Copyright (c) 2019 Frederick Jansen
  # 
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  # 
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  # 
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  
  
  def decodePolyline(expression, precision=5):
      def _trans(value, index):
          byte, result, shift = None, 0, 0
  
          while byte is None or byte >= 0x20:
              byte = ord(value[index]) - 63
              index += 1
              result |= (byte & 0x1f) << shift
              shift += 5
              comp = result & 1
  
          return ~(result >> 1) if comp else (result >> 1), index
  
      coordinates, index, lat, lng, length, factor = [], 0, 0, 0, len(expression), float(10 ** precision)
  
      while index < length:
          lat_change, index = _trans(expression, index)
          lng_change, index = _trans(expression, index)
          lat += lat_change
          lng += lng_change
          coordinates.append((lng / factor, lat / factor))
  
      return coordinates
  