Question

How do I catch if map type was changed?

• catch if maptype id = roadmap/satellite/hybrid/terrain
• catch if streetview was used

Answer 1

Both of these are pretty straightforward – you simply listen to the proper events:

Map Type Changed:

google.maps.event.addListener(map, 'maptypeid_changed', function() {
  console.log("map type changed");
});

Streetview Activated:

var pano = map.getStreetView();
google.maps.event.addListener(pano, 'visible_changed', function() {
  if (pano.getVisible()) {
    console.log("street view visible");
  }
});