javascript - Google Maps Multiple Custom Markers

Question

So I'm trying to learn how to make a google map. I have very little understanding of javascript but am trying to learn here.

I referenced a code online and I got to the point where I sort of understand how to add locations, marker, and a infowindow but I'm trying to figure out how to add multiple custom icons for each marker.

Thanks for the help.

function initialize() {

        //add map, the type of map
        var map = new google.maps.Map(document.getElementById('map'), {
            zoom: 6,
            center: new google.maps.LatLng(37.7749295, -122.4194155),
            mapTypeId: google.maps.MapTypeId.ROADMAP
        });

        //add locations
        var locations = [
            ['San Francisco: Power Outage', 37.7749295, -122.4194155],
            ['Sausalito', 37.8590937, -122.4852507],
            ['Sacramento', 38.5815719, -121.4943996],
            ['Soledad', 36.424687, -121.3263187],
            ['Shingletown', 40.4923784, -121.8891586]
        ];

        //declare marker call it 'i'
        var marker, i;

        //declare infowindow
        var infowindow = new google.maps.InfoWindow();

        //add marker to each locations
        for (i = 0; i < locations.length; i++) {
            marker = new google.maps.Marker({
                position: new google.maps.LatLng(locations[i][1], locations[i][2]),
                map: map,
            });

            //click function to marker, pops up infowindow
            google.maps.event.addListener(marker, 'click', (function(marker, i) {
                return function() {
                    infowindow.setContent(locations[i][0]);
                    infowindow.open(map, marker);
                }
            })(marker, i));
        }
    }
    google.maps.event.addDomListener(window, 'load', initialize);

Answer 1

There are multiple ways, the easiest is to set the icon-property of the marker to a URL of an image you want to appear as marker.

sample:

//modified array with icon-URLs
var locations = [
            ['San Francisco: Power Outage', 37.7749295, -122.4194155,'http://labs.google.com/ridefinder/images/mm_20_purple.png'],
            ['Sausalito', 37.8590937, -122.4852507,'http://labs.google.com/ridefinder/images/mm_20_red.png'],
            ['Sacramento', 38.5815719, -121.4943996,'http://labs.google.com/ridefinder/images/mm_20_green.png'],
            ['Soledad', 36.424687, -121.3263187,'http://labs.google.com/ridefinder/images/mm_20_blue.png'],
            ['Shingletown', 40.4923784, -121.8891586,'http://labs.google.com/ridefinder/images/mm_20_yellow.png']
        ];



//inside the loop
marker = new google.maps.Marker({
                position: new google.maps.LatLng(locations[i][1], locations[i][2]),
                map: map,
                icon: locations[i][3]
            });