code: function(start, end, accuracy) {
  
  			var keys = geolib.getKeys(start);
  			var latitude = keys.latitude;
  			var longitude = keys.longitude;
  
  			accuracy = Math.floor(accuracy) || 1;
  
  			var coord1 = {}, coord2 = {};
  			coord1[latitude] = parseFloat(geolib.useDecimal(start[latitude])).toRad();
  			coord1[longitude] = parseFloat(geolib.useDecimal(start[longitude])).toRad();
  
  			coord2[latitude] = parseFloat(geolib.useDecimal(end[latitude])).toRad();
  			coord2[longitude] = parseFloat(geolib.useDecimal(end[longitude])).toRad();
  
  			var distance = 
  				Math.round(
  					Math.acos(
  						Math.sin(
  							coord2[latitude]
  						) * 
  						Math.sin(
  							coord1[latitude]
  						) + 
  						Math.cos(
  							coord2[latitude]
  						) * 
  						Math.cos(
  							coord1[latitude]
  						) * 
  						Math.cos(
  							coord1[longitude] - coord2[longitude]
  						) 
  					) * radius
  				);
  
  			return geolib.distance = Math.floor(Math.round(distance/accuracy)*accuracy);
  
  		}
docs: Calculates the distance between two spots.
  This method is more simple but also more inaccurate
  
  @param    object    Start position {latitude: 123, longitude: 123}
  @param    object    End position {latitude: 123, longitude: 123}
  @param    integer   Accuracy (in meters)
  @return   integer   Distance (in meters)