code: function (cpt, bl) {
  			var vY = bl[1].lat - bl[0].lat,
  				vX = bl[0].lng - bl[1].lng;
  			return (vX * (cpt.lat - bl[0].lat) + vY * (cpt.lng - bl[0].lng));
  		}
docs: /*
  @param {Object} cpt a point to be measured from the baseline
  @param {Array} bl the baseline, as represented by a two-element
  array of latlng objects.
  @returns {Number} an approximate distance measure