code: function forward$16(p) {
  
          var lon = p.x;
          var lat = p.y;
  
          var dlon = adjust_lon(lon - this.long0);
          var dlat = adjust_lat(lat - this.lat0);
          p.x = this.x0 + (this.a * dlon * this.rc);
          p.y = this.y0 + (this.a * dlat);
          return p;
      }
docs: forward equations--mapping lat,long to x,y -----------------------------------------------------------------