Marker Labels

This example creates a map where each click by the user creates a marker that's labeled with a single alphabetical character.

Read the documentation.

JavaScript

// In the following example, markers appear when the user clicks on the map.
// Each marker is labeled with a single alphabetical character.
var labels = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
var labelIndex = 0;

function initMap() {
  var bangalore = { lat: 12.97, lng: 77.59 };
  var map = new google.maps.Map(document.getElementById("map"), {
    zoom: 12,
    center: bangalore
  });

  // This event listener calls addMarker() when the map is clicked.
  google.maps.event.addListener(map, "click", function(event) {
    addMarker(event.latLng, map);
  });

  // Add a marker at the center of the map.
  addMarker(bangalore, map);
}

// Adds a marker to the map.
function addMarker(location, map) {
  // Add the marker at the clicked location, and add the next-available label
  // from the array of alphabetical characters.
  var marker = new google.maps.Marker({
    position: location,
    label: labels[labelIndex++ % labels.length],
    map: map
  });
}

CSS

/* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
#map {
  height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Marker Labels</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script src="./app.js"></script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>

All

<!DOCTYPE html>
<html>
  <head>
    <title>Marker Labels</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <script
      src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap&libraries=&v=weekly"
      defer
    ></script>
    <style type="text/css">
      /* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
      #map {
        height: 100%;
      }

      /* Optional: Makes the sample page fill the window. */
      html,
      body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
    </style>
    <script>
      (function(exports) {
        "use strict";

        // In the following example, markers appear when the user clicks on the map.
        // Each marker is labeled with a single alphabetical character.
        var labels = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
        exports.labelIndex = 0;

        function initMap() {
          var bangalore = {
            lat: 12.97,
            lng: 77.59
          };
          var map = new google.maps.Map(document.getElementById("map"), {
            zoom: 12,
            center: bangalore
          }); // This event listener calls addMarker() when the map is clicked.

          google.maps.event.addListener(map, "click", function(event) {
            addMarker(event.latLng, map);
          }); // Add a marker at the center of the map.

          addMarker(bangalore, map);
        } // Adds a marker to the map.

        function addMarker(location, map) {
          // Add the marker at the clicked location, and add the next-available label
          // from the array of alphabetical characters.
          var marker = new google.maps.Marker({
            position: location,
            label: labels[exports.labelIndex++ % labels.length],
            map: map
          });
        }

        exports.addMarker = addMarker;
        exports.initMap = initMap;
        exports.labels = labels;
      })((this.window = this.window || {}));
    </script>
  </head>
  <body>
    <div id="map"></div>
  </body>
</html>

/* Always set the map height explicitly to define the size of the div * element that contains the map. */ #map { height: 100%; } /* Optional: Makes the sample page fill the window. */ html, body { height: 100%; margin: 0; padding: 0; }

<!DOCTYPE html> <html> <head> <title>Marker Labels</title> <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script> <script src="https://maps.googleapis.com/maps/api/js?key=&callback=initMap&libraries=&v=weekly" defer ></script>  </head> <body> <div id="map"></div> </body> </html>