1 Answer

• Accepted Answer

  Why can't you just add an annotation with your custom image like this?

    currentLocation = Ti.Map.createAnnotation({
      latitude: currentLat,
      longitude: currentLng,
      title: 'You are here',
      image: 'images/icon-gps-location.png',  // This is your custom image
      animate:true 
      });     
  
      mapview.addAnnotation(currentLocation);
  

  The problem with mapping the lat/lng to screen coordinates is you have to watch for every regionchange event and orientationchange event so you can handle the device being rotated or the map moving. It's easier to drop an annotation on the map and let the mapview do the work.

  You can find the visible area of the map by looking at mapview.region. This will have the center of the map and the delta in degrees.