code: def coordinateForPosition(self, longitude, latitude, altitude=None):
      
      coords = PROJ(longitude, latitude)
  
      if altitude is not None:
        coords = transform(PROJ, geocentric, coords[0], coords[1], altitude)
  
      coordinate = numpy.array(coords)
      coordinate = coordinate / self.scale
      return coordinate.astype(int)
docs: Returns coordinate for given GPS position.
  
      :param: longitude (float) Longitude of position
      :param: latitude (float) Latitude of position
      :param: altitude (float) Altitude of position
      :returns: (numpy.array) Coordinate that the given GPS position
                            maps to