Google maps GeoJSON- toggle marker layers?

Question

I have some GeoJSON returned from a call to a PostGIS database. I\'d like to be able to add a marker for each feature, and be able to toggle different types of marker/feature. C

Answer 1

To Add: var layer_1 = new google.maps.Data(); should be done inside map initialization function, as:

var map;

  var data_layer_for_ramps;



  function initialize() {

            map = new google.maps.Map(document.getElementById('map'), {
              zoom: 12,
              center: new google.maps.LatLng(-33.897907, 151.179138),//-33.8151,151.0032 
              mapTypeId: 'roadmap'
            });

            data_layer_for_ramps = new google.maps.Data();
        }   

Answer 2

You can also create separate layers

var layer_1 = new google.maps.Data();
var layer_2 = new google.maps.Data();

then populate it, e.g. with json data

layer_1.loadGeoJson('/path/to/data.json');
layer_2.loadGeoJson('/path/to/data2.json');

then add / remove them on the map

layer_1.setMap(map);
layer_2.setMap(map);
layer_1.setMap(null);