code: function (recognizer) {
              // Obtain the event location.
              var x = recognizer.clientX,
                  y = recognizer.clientY;
  
              // Perform the pick. Must first convert from window coordinates to canvas coordinates, which are
              // relative to the upper left corner of the canvas rather than the upper left corner of the page.
              var pickList = wwd.pick(wwd.canvasCoordinates(x, y));
  
              // If only one thing is picked and it is the terrain, tell the WorldWindow to go to the picked location.
              if (pickList.objects.length === 1 && pickList.objects[0].isTerrain) {
                  var position = pickList.objects[0].position;
                  wwd.goTo(new WorldWind.Location(position.latitude, position.longitude));
              }
          }
docs: Now set up to handle clicks and taps. The common gesture-handling function.