Kml Layers Rendering Order Google Maps

I have noticed some different behavior with the following APIS http://jsfiddle

Solution 1:

The layers get rendered in the order they are received from the server (which is not necessarily the order in which they appear in the code). You can force one to load after the other by waiting for the KmlLayer status_changed event before setting the map property of the second.

functioninitialize() {
  var chicago = new google.maps.LatLng(-122.365662,37.826988);
  var mapOptions = {
    zoom: 11,
    center: chicago
  }

  var map = new google.maps.Map(document.getElementById('map-canvas'), mapOptions);

  var ctaLayer = new google.maps.KmlLayer({
    url: 'https://sites.google.com/site/gmaptest123/kml/nst.kml'
  });
  google.maps.event.addListener(ctaLayer, "status_changed", function() {
    ctaLayer2.setMap(map);
  });
  ctaLayer.setMap(map);

  var ctaLayer2 = new google.maps.KmlLayer({
    url: 'https://sites.google.com/site/gmaptest123/kml/HelloKml6.kml'
  });
}
google.maps.event.addDomListener(window, 'load', initialize);

updated fiddle

Solution 2:

I've got it working here

Add these two parameters to your markers layer:

pane:"floatPane",
preserveViewport:true

So it looks like this:

var ctaLayer2 = new google.maps.KmlLayer({
    url: 'https://sites.google.com/site/gmaptest123/kml/HelloKml6.kml',
    pane: "floatPane",
    preserveViewport: true
});

The default is, I believe, mapPane, which has a lower z-index than floatPane.

Solution 3:

There is an interesting method in this link. Here is the actual ordering code:

// BEGIN SEQUENTIAL KML LOADING CODE// This ensures the layers are drawn in order: cone, warnings, track// Draw coneLayer
coneLayer.setMap(map);

// Listen for when coneLayer is drawnvar listener1 = google.maps.event.addListener(coneLayer, 'metadata_changed', function() {
  // When it's drawn (metadata changed), clear listener, draw warningsLayer ...
  google.maps.event.clearListeners(coneLayer, 'metadata_changed');
  warningsLayer.setMap(map);

  // .. and listen for when warningsLayer is drawnvar listener2 = google.maps.event.addListener(warningsLayer, 'metadata_changed', function() {
    // When it's drawn, clear listener, draw trackLayer ...
    google.maps.event.clearListeners(warningsLayer, 'metadata_changed');
    trackLayer.setMap(map);

    // ... and listen for when trackLayer is drawnvar listener3 = google.maps.event.addListener(trackLayer, 'metadata_changed', function() {
      // When it's drawn, clear listener and blank out the map-loading sign
      google.maps.event.clearListeners(trackLayer, 'metadata_changed');
      $('#loadingIndicator').html("");

    });

  });

});

// END SEQUENTIAL KML LOADING CODE