Custom Symbols (Polyline)

This example adds a custom symbol to a polyline.

// This example adds three custom symbols to a polyline.

function initMap() {
  var map = new google.maps.Map(document.getElementById('map'), {
    zoom: 6,
    center: {lat: 20.291, lng: 153.027},
    mapTypeId: 'terrain'
  });

// Define the custom symbols. All symbols are defined via SVG path notation.
// They have varying stroke color, fill color, stroke weight,
// opacity and rotation properties.
  var symbolOne = {
    path: 'M -2,0 0,-2 2,0 0,2 z',
    strokeColor: '#F00',
    fillColor: '#F00',
    fillOpacity: 1
  };

  var symbolTwo = {
    path: 'M -1,0 A 1,1 0 0 0 -3,0 1,1 0 0 0 -1,0M 1,0 A 1,1 0 0 0 3,0 1,1 0 0 0 1,0M -3,3 Q 0,5 3,3',
    strokeColor: '#00F',
    rotation: 45
  };

  var symbolThree = {
    path: 'M -2,-2 2,2 M 2,-2 -2,2',
    strokeColor: '#292',
    strokeWeight: 4
  };

  // Create the polyline and add the symbols via the 'icons' property.
  var line = new google.maps.Polyline({
    path: [{lat: 22.291, lng: 153.027}, {lat: 18.291, lng: 153.027}],
    icons: [
      {
        icon: symbolOne,
        offset: '0%'
      }, {
        icon: symbolTwo,
        offset: '50%'
      }, {
        icon: symbolThree,
        offset: '100%'
      }
    ],
    map: map
  });
}

<div id="map"></div>

/* 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;
}

<!-- Replace the value of the key parameter with your own API key. -->
<script async defer
src="https://maps.googleapis.com/maps/api/js?key=AIzaSyCkUOdZ5y7hMm0yrcCQoCvLwzdM6M8s5qk&callback=initMap">
</script>

Try it yourself

You can experiment with this code in JSFiddle by clicking the <> icon in the top-right corner of the code window.

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no">
    <meta charset="utf-8">
    <title>Custom Symbols (Polyline)</title>
    <style>
      /* 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>
  </head>
  <body>
    <div id="map"></div>
    <script>
      // This example adds three custom symbols to a polyline.

      function initMap() {
        var map = new google.maps.Map(document.getElementById('map'), {
          zoom: 6,
          center: {lat: 20.291, lng: 153.027},
          mapTypeId: 'terrain'
        });

      // Define the custom symbols. All symbols are defined via SVG path notation.
      // They have varying stroke color, fill color, stroke weight,
      // opacity and rotation properties.
        var symbolOne = {
          path: 'M -2,0 0,-2 2,0 0,2 z',
          strokeColor: '#F00',
          fillColor: '#F00',
          fillOpacity: 1
        };

        var symbolTwo = {
          path: 'M -1,0 A 1,1 0 0 0 -3,0 1,1 0 0 0 -1,0M 1,0 A 1,1 0 0 0 3,0 1,1 0 0 0 1,0M -3,3 Q 0,5 3,3',
          strokeColor: '#00F',
          rotation: 45
        };

        var symbolThree = {
          path: 'M -2,-2 2,2 M 2,-2 -2,2',
          strokeColor: '#292',
          strokeWeight: 4
        };

        // Create the polyline and add the symbols via the 'icons' property.
        var line = new google.maps.Polyline({
          path: [{lat: 22.291, lng: 153.027}, {lat: 18.291, lng: 153.027}],
          icons: [
            {
              icon: symbolOne,
              offset: '0%'
            }, {
              icon: symbolTwo,
              offset: '50%'
            }, {
              icon: symbolThree,
              offset: '100%'
            }
          ],
          map: map
        });
      }
    </script>
    <script async defer
    src="https://maps.googleapis.com/maps/api/js?key=YOUR_API_KEY&callback=initMap">
    </script>
  </body>
</html>