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This example uses OpenLayers v<span>6.5.0</span>. The <a id="latest-link" href="#" class="alert-link">latest</a> is v<span id="latest-version"></span>.
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<div class="span12">
<h4 id="title">Marker Animation</h4>
<p class="tags">
<span class="badge-group">
<a
href="./index.html?q=animation" class="badge badge-info">animation</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="animation"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./animated-gif.html&quot;&gt;Animated GIF&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./feature-animation.html&quot;&gt;Custom Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./flight-animation.html&quot;&gt;Flight Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./feature-move-animation.html&quot;&gt;Marker Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./animation.html&quot;&gt;View Animation&lt;/a&gt;"
tabindex="0"
>5</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=feature" class="badge badge-info">feature</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="feature"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-esri.html&quot;&gt;ArcGIS REST Feature Service&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./box-selection.html&quot;&gt;Box Selection&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./feature-animation.html&quot;&gt;Custom Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./custom-circle-render.html&quot;&gt;Custom Circle Render&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./custom-interactions.html&quot;&gt;Custom Interactions&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-esri-edit.html&quot;&gt;Editable ArcGIS REST Feature Service&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./filter-points-webgl.html&quot;&gt;Filtering features with WebGL&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./flight-animation.html&quot;&gt;Flight Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./feature-move-animation.html&quot;&gt;Marker Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./translate-features.html&quot;&gt;Translate Features&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./webgl-points-layer.html&quot;&gt;WebGL points layer&lt;/a&gt;"
tabindex="0"
>11</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=postrender" class="badge badge-info">postrender</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="postrender"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./feature-move-animation.html&quot;&gt;Marker Animation&lt;/a&gt;"
tabindex="0"
>1</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=polyline" class="badge badge-info">polyline</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="polyline"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./feature-move-animation.html&quot;&gt;Marker Animation&lt;/a&gt;"
tabindex="0"
>1</a>
</span>
<span class="badge-group">
<a
href="./index.html?q=maptiler" class="badge badge-info">maptiler</a
><a
class="badge badge-info tag-modal-toggle text-white"
data-toggle="modal"
data-target="#tag-example-list"
data-title="maptiler"
data-content="
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./zoom-constrained.html&quot;&gt;Constrained Zoom&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./disable-image-smoothing.html&quot;&gt;Disable Image Smoothing&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./drag-and-drop.html&quot;&gt;Drag-and-Drop&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./drag-and-drop-image-vector.html&quot;&gt;Drag-and-Drop Image Vector&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./full-screen.html&quot;&gt;Full Screen Control&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./full-screen-drag-rotate-and-zoom.html&quot;&gt;Full Screen Drag, Rotate, and Zoom&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./gpx.html&quot;&gt;GPX Data&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./image-filter.html&quot;&gt;Image Filters&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./kml.html&quot;&gt;KML&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./layer-spy.html&quot;&gt;Layer Spy&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./layer-swipe.html&quot;&gt;Layer Swipe&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./magnify.html&quot;&gt;Magnify&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-layer.html&quot;&gt;Mapbox-gl Layer&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action active&quot; href=&quot;./feature-move-animation.html&quot;&gt;Marker Animation&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-osm.html&quot;&gt;OSM XML&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./raster.html&quot;&gt;Raster Source&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./region-growing.html&quot;&gt;Region Growing&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./side-by-side.html&quot;&gt;Shared Views&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./street-labels.html&quot;&gt;Street Labels&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./mapbox-style.html&quot;&gt;Vector tiles created from a Mapbox Style object&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-tiles-4326.html&quot;&gt;Vector tiles in EPSG:4326&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-wfs.html&quot;&gt;WFS&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./vector-wfs-getfeature.html&quot;&gt;WFS - GetFeature&lt;/a&gt;
&lt;a class=&quot;list-group-item list-group-item-action&quot; href=&quot;./xyz-retina.html&quot;&gt;XYZ Retina Tiles&lt;/a&gt;"
tabindex="0"
>24</a>
</span>
</p>
<div class="modal modal-tag-example" id="tag-example-list" tabindex="-1" role="dialog" aria-labelledby="tag-example-title" aria-hidden="true">
<div class="modal-dialog modal-dialog-scrollable" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="tag-example-title"></h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">&times;</span>
</button>
</div>
<div class="modal-body">
<div class="list-group"></div>
</div>
</div>
</div>
</div>
<div id="map" class="map"></div>
<label for="speed">
speed:&nbsp;
<input id="speed" type="range" min="10" max="999" step="10" value="60">
</label>
<button id="start-animation">Start Animation</button>
</div>
<form method="POST" id="codepen-form" target="_blank" action="https://codesandbox.io/api/v1/sandboxes/define">
<input id="codesandbox-params" type="hidden" name="parameters">
</form>
</div>
<div class="row-fluid">
<div class="span12">
<p id="shortdesc">Demonstrates how to move a feature along a line.</p>
<div id="docs"><p>This example shows how to use <b>postrender</b> events and a <b>vector context</b> to animate a marker feature along a line. In this example an encoded polyline is being used.</p>
</div>
</div>
</div>
<div class="row-fluid">
<h5 class="source-heading">main.js</h5>
<pre><code id="example-js-source" class="language-js">import 'ol/ol.css';
import Feature from &#x27;ol/Feature&#x27;;
import Map from &#x27;ol/Map&#x27;;
import Point from &#x27;ol/geom/Point&#x27;;
import Polyline from &#x27;ol/format/Polyline&#x27;;
import VectorSource from &#x27;ol/source/Vector&#x27;;
import View from &#x27;ol/View&#x27;;
import XYZ from &#x27;ol/source/XYZ&#x27;;
import {
Circle as CircleStyle,
Fill,
Icon,
Stroke,
Style,
} from &#x27;ol/style&#x27;;
import {Tile as TileLayer, Vector as VectorLayer} from &#x27;ol/layer&#x27;;
import {getVectorContext} from &#x27;ol/render&#x27;;
var key &#x3D; &#x27;Get your own API key at https://www.maptiler.com/cloud/&#x27;;
var attributions &#x3D;
&#x27;&lt;a href&#x3D;&quot;https://www.maptiler.com/copyright/&quot; target&#x3D;&quot;_blank&quot;&gt;&amp;copy; MapTiler&lt;/a&gt; &#x27; +
&#x27;&lt;a href&#x3D;&quot;https://www.openstreetmap.org/copyright&quot; target&#x3D;&quot;_blank&quot;&gt;&amp;copy; OpenStreetMap contributors&lt;/a&gt;&#x27;;
var center &#x3D; [-5639523.95, -3501274.52];
var map &#x3D; new Map({
target: document.getElementById(&#x27;map&#x27;),
view: new View({
center: center,
zoom: 10,
minZoom: 2,
maxZoom: 19,
}),
layers: [
new TileLayer({
source: new XYZ({
attributions: attributions,
url: &#x27;https://api.maptiler.com/maps/hybrid/{z}/{x}/{y}.jpg?key&#x3D;&#x27; + key,
tileSize: 512,
}),
}) ],
});
// The polyline string is read from a JSON similiar to those returned
// by directions APIs such as Openrouteservice and Mapbox.
fetch(&#x27;data/polyline/route.json&#x27;).then(function (response) {
response.json().then(function (result) {
var polyline &#x3D; result.routes[0].geometry;
var route &#x3D; new Polyline({
factor: 1e6,
}).readGeometry(polyline, {
dataProjection: &#x27;EPSG:4326&#x27;,
featureProjection: &#x27;EPSG:3857&#x27;,
});
var routeFeature &#x3D; new Feature({
type: &#x27;route&#x27;,
geometry: route,
});
var geoMarker &#x3D; new Feature({
type: &#x27;geoMarker&#x27;,
geometry: new Point(route.getCoordinateAt(0)),
});
var startMarker &#x3D; new Feature({
type: &#x27;icon&#x27;,
geometry: new Point(route.getCoordinateAt(0)),
});
var endMarker &#x3D; new Feature({
type: &#x27;icon&#x27;,
geometry: new Point(route.getCoordinateAt(1)),
});
var styles &#x3D; {
&#x27;route&#x27;: new Style({
stroke: new Stroke({
width: 6,
color: [237, 212, 0, 0.8],
}),
}),
&#x27;icon&#x27;: new Style({
image: new Icon({
anchor: [0.5, 1],
src: &#x27;data/icon.png&#x27;,
}),
}),
&#x27;geoMarker&#x27;: new Style({
image: new CircleStyle({
radius: 7,
fill: new Fill({color: &#x27;black&#x27;}),
stroke: new Stroke({
color: &#x27;white&#x27;,
width: 2,
}),
}),
}),
};
var animating &#x3D; false;
var vectorLayer &#x3D; new VectorLayer({
source: new VectorSource({
features: [routeFeature, geoMarker, startMarker, endMarker],
}),
style: function (feature) {
// hide geoMarker if animation is active
if (animating &amp;&amp; feature.get(&#x27;type&#x27;) &#x3D;&#x3D;&#x3D; &#x27;geoMarker&#x27;) {
return null;
}
return styles[feature.get(&#x27;type&#x27;)];
},
});
map.addLayer(vectorLayer);
var speed, startTime;
var speedInput &#x3D; document.getElementById(&#x27;speed&#x27;);
var startButton &#x3D; document.getElementById(&#x27;start-animation&#x27;);
function moveFeature(event) {
var vectorContext &#x3D; getVectorContext(event);
var frameState &#x3D; event.frameState;
if (animating) {
var elapsedTime &#x3D; frameState.time - startTime;
var distance &#x3D; (speed * elapsedTime) / 1e6;
if (distance &gt;&#x3D; 1) {
stopAnimation(true);
return;
}
var currentPoint &#x3D; new Point(route.getCoordinateAt(distance));
var feature &#x3D; new Feature(currentPoint);
vectorContext.drawFeature(feature, styles.geoMarker);
}
// tell OpenLayers to continue the postrender animation
map.render();
}
function startAnimation() {
if (animating) {
stopAnimation(false);
} else {
animating &#x3D; true;
startTime &#x3D; new Date().getTime();
speed &#x3D; speedInput.value;
startButton.textContent &#x3D; &#x27;Cancel Animation&#x27;;
// hide geoMarker
geoMarker.changed();
// just in case you pan somewhere else
map.getView().setCenter(center);
vectorLayer.on(&#x27;postrender&#x27;, moveFeature);
map.render();
}
}
function stopAnimation(ended) {
animating &#x3D; false;
startButton.textContent &#x3D; &#x27;Start Animation&#x27;;
// if animation cancelled set the marker at the beginning
var coord &#x3D; route.getCoordinateAt(ended ? 1 : 0);
geoMarker.getGeometry().setCoordinates(coord);
// remove listener
vectorLayer.un(&#x27;postrender&#x27;, moveFeature);
}
startButton.addEventListener(&#x27;click&#x27;, startAnimation, false);
});
});
</code></pre>
</div>
<div class="row-fluid">
<h5 class="source-heading">index.html</h5>
<pre><code id="example-html-source" class="language-markup">&lt;!DOCTYPE html&gt;
&lt;html lang="en"&gt;
&lt;head&gt;
&lt;meta charset="UTF-8"&gt;
&lt;title&gt;Marker Animation&lt;/title&gt;
&lt;!-- Pointer events polyfill for old browsers, see https://caniuse.com/#feat=pointer --&gt;
&lt;script src="https://unpkg.com/elm-pep"&gt;&lt;/script&gt;
&lt;style&gt;
.map {
width: 100%;
height:400px;
}
&lt;/style&gt;
&lt;/head&gt;
&lt;body&gt;
&lt;div id&#x3D;&quot;map&quot; class&#x3D;&quot;map&quot;&gt;&lt;/div&gt;
&lt;label for&#x3D;&quot;speed&quot;&gt;
speed:&amp;nbsp;
&lt;input id&#x3D;&quot;speed&quot; type&#x3D;&quot;range&quot; min&#x3D;&quot;10&quot; max&#x3D;&quot;999&quot; step&#x3D;&quot;10&quot; value&#x3D;&quot;60&quot;&gt;
&lt;/label&gt;
&lt;button id&#x3D;&quot;start-animation&quot;&gt;Start Animation&lt;/button&gt;
&lt;script src="main.js"&gt;&lt;/script&gt;
&lt;/body&gt;
&lt;/html&gt;</code></pre>
</div>
<div class="row-fluid">
<h5 class="source-heading">package.json</h5>
<pre><code id="example-pkg-source" class="language-json">{
&quot;name&quot;: &quot;feature-move-animation&quot;,
&quot;dependencies&quot;: {
&quot;ol&quot;: &quot;6.5.0&quot;
},
&quot;devDependencies&quot;: {
&quot;parcel&quot;: &quot;^2.0.0-beta.1&quot;
},
&quot;scripts&quot;: {
&quot;start&quot;: &quot;parcel index.html&quot;,
&quot;build&quot;: &quot;parcel build --public-url . index.html&quot;
}
}</code></pre>
</div>
</div>
<script src="https://code.jquery.com/jquery-3.5.1.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.0/js/bootstrap.bundle.min.js"></script>
<script src="./resources/prism/prism-1.20.0.min.js"></script>
<script src="./resources/common.js"></script>
<script src="common.js"></script>
<script src="feature-move-animation.js"></script>
<script>
$('#tag-example-list').on('show.bs.modal', function (event) {
const button = $(event.relatedTarget); // Button that triggered the modal
const title = button.data('title');
const content = button.data('content');
const modal = $(this)
modal.find('.modal-title').text(title);
modal.find('.modal-body').html(content);
});
var packageUrl = 'https://raw.githubusercontent.com/openlayers/openlayers.github.io/build/package.json';
fetch(packageUrl).then(function(response) {
return response.json();
}).then(function(json) {
var latestVersion = json.version;
document.getElementById('latest-version').innerHTML = latestVersion;
var url = window.location.href;
var branchSearch = url.match(/\/([^\/]*)\/examples\//);
var cookieText = 'dismissed=-' + latestVersion + '-';
var dismissed = document.cookie.indexOf(cookieText) != -1;
if (branchSearch && !dismissed && /^v[0-9\.]*$/.test(branchSearch[1]) && '6.5.0' != latestVersion) {
var link = url.replace(branchSearch[0], '/latest/examples/');
fetch(link, {method: 'head'}).then(function(response) {
var a = document.getElementById('latest-link');
a.href = response.status == 200 ? link : '../../latest/examples/';
});
var latestCheck = document.getElementById('latest-check');
latestCheck.style.display = '';
document.getElementById('latest-dismiss').onclick = function() {
latestCheck.style.display = 'none';
document.cookie = cookieText;
}
}
});
</script>
</body>
</html>