API-Example: Geotracking Demo

A geotracking simulation from a pedestrian's perspective.

The code is a little more extensive when you have to simulate a user's journey. The abridged code for this function, which will account for a user's actual location – and is not a simulation –, can be found on our geotracking example page.

// create a background layer
const baseLayer = new ol.layer.Tile({
	source: new ol.source.XYZ({
    attributions: ['© 2023 <a target="_blank" href="http://www.mapz.com">mapz.com </a>\
            - Map Data: <a target="_blank" href="http://openstreetmap.org">OpenStreetMap</a>\
            (<a href="http://opendatacommons.org/licenses/odbl/1.0/" target="_blank">ODbL</a>)'],
    tilePixelRatio: 2,
    url:'https://tiles.mapz.com/mapproxy/v1/demo-817ca352/tiles/1.0.0/mapz_multicolor_base_hq/EPSG3857/{z}/{x}/{-y}.jpeg'
  })
});

const map = new ol.Map({
  target: document.getElementById('map'),
  logo: false,
  layers: [
    baseLayer
  ],
  view: new ol.View({
    center: ol.proj.transform([5.868668798, 45.64444874417562], 'EPSG:4326', 'EPSG:3857'),
    zoom: 17
  })
});

// EnableHighAccuracy
const geolocation = new ol.Geolocation({
  trackingOptions: {
    enableHighAccuracy: true
  }
});

// Create geotracker
const geotracker = new ol.mapz.control.Geotracker({
  // define position symbol
  marker: {
    src: 'https://mapz.com/api/images/position.svg',
    // Set imgSize to fix IE11-Bug 
    imgSize: [28.346, 28.346],
    height: 60
  },
  // set style for recorded track
  trackStyle: new ol.style.Style({
    stroke: new ol.style.Stroke({
      width: 5,
      color: 'rgba(239, 130, 20, 0.5)'
    })
  }),
  //don't start tracking automatically
  autostart: false,
  // rotate view when updating position
  rotate: false,
  // enable high accuracy
  enableHighAccuracy: true
});

map.addControl(geotracker);

/*
 * All of the following code is used for simulating device movement
 */

// simulate device move
let simulationData;
fetch('https://mapz.com/api/data/geolocation-orientation.json')
  .then((response) => response.json())
  .then((data) => (simulationData = data.data));

// convert degrees to radians
function degToRad(deg) {
  return deg * Math.PI * 2 / 360;
}

const startSimulateBtn = document.getElementById('start-simulate');
const stopSimulateBtn = document.getElementById('stop-simulate');
const geotrackerBtn = document.querySelector('.mapz-control-geotracker-button');
let cancelSimulation = false;

startSimulateBtn.onclick = function () {
  if (!simulationData) {
    return;
  }
  cancelSimulation = false;
  startSimulateBtn.style.display = 'none';
  stopSimulateBtn.style.display = '';
  geotracker.getGeolocation().setTracking(false);
  const coordinates = simulationData;

const first = coordinates.shift();
  simulatePositionChange(first);

function stopSimulation() {
  startSimulateBtn.style.display = '';
  stopSimulateBtn.style.display = 'none';
  cancelSimulation = true;
}

stopSimulateBtn.onclick = function () {
  stopSimulation();
};
geotrackerBtn.onclick = function () {
  stopSimulation();
};

function simulatePositionChange(position) {
  const coords = position.coords;
  const geolocation = geotracker.getGeolocation();
  geolocation.set('accuracy', coords.accuracy);
  geolocation.set('heading', degToRad(coords.heading));
  const position_ = [coords.longitude, coords.latitude];
  const projectedPosition = ol.proj.transform(position_, 'EPSG:4326', 'EPSG:3857');
  geolocation.set('position', projectedPosition);
  geolocation.set('speed', coords.speed);
  geolocation.changed();
}


<body>
    <div id="map" class="map"></div>
    <button id="start-simulate" class="button-secondary">Start simulation</button>
    <button id="stop-simulate" class="button-secondary" style="display: none">End simulation</button>
</body>


<script>
  // create a background layer
  const baseLayer = new ol.layer.Tile({
  	source: new ol.source.XYZ({
      attributions: ['© 2023 <a target="_blank" href="http://www.mapz.com">mapz.com </a>\
              - Map Data: <a target="_blank" href="http://openstreetmap.org">OpenStreetMap</a>\
              (<a href="http://opendatacommons.org/licenses/odbl/1.0/" target="_blank">ODbL</a>)'],
      tilePixelRatio: 2,
      url:'https://tiles.mapz.com/mapproxy/v1/demo-817ca352/tiles/1.0.0/mapz_multicolor_base_hq/EPSG3857/{z}/{x}/{-y}.jpeg'
    })
  });

  const map = new ol.Map({
    target: document.getElementById('map'),
    logo: false,
    layers: [
      baseLayer
    ],
    view: new ol.View({
      center: ol.proj.transform([5.868668798, 45.64444874417562], 'EPSG:4326', 'EPSG:3857'),
      zoom: 17
    })
  });

  // EnableHighAccuracy
  const geolocation = new ol.Geolocation({
    trackingOptions: {
      enableHighAccuracy: true
    }
  });

  // Create geotracker
  const geotracker = new ol.mapz.control.Geotracker({
    // define position symbol
    marker: {
      src: 'https://mapz.com/api/images/position.svg',
      // Set imgSize to fix IE11-Bug 
      imgSize: [28.346, 28.346],
      height: 60
    },
    // set style for recorded track
    trackStyle: new ol.style.Style({
      stroke: new ol.style.Stroke({
        width: 5,
        color: 'rgba(239, 130, 20, 0.5)'
      })
    }),
    //don't start tracking automatically
    autostart: false,
    // rotate view when updating position
    rotate: false,
    // enable high accuracy
    enableHighAccuracy: true
  });

  map.addControl(geotracker);

  /*
   * All of the following code is used for simulating device movement
   */

  // simulate device move
  let simulationData;
  fetch('https://mapz.com/api/data/geolocation-orientation.json')
    .then((response) => response.json())
    .then((data) => (simulationData = data.data));

  // convert degrees to radians
  function degToRad(deg) {
    return deg * Math.PI * 2 / 360;
  }

  const startSimulateBtn = document.getElementById('start-simulate');
  const stopSimulateBtn = document.getElementById('stop-simulate');
  const geotrackerBtn = document.querySelector('.mapz-control-geotracker-button');
  let cancelSimulation = false;

  startSimulateBtn.onclick = function () {
    if (!simulationData) {
      return;
    }
    cancelSimulation = false;
    startSimulateBtn.style.display = 'none';
    stopSimulateBtn.style.display = '';
    geotracker.getGeolocation().setTracking(false);
    const coordinates = simulationData;

    const first = coordinates.shift();
    simulatePositionChange(first);

    let prevDate = first.timestamp;
    function geolocate() {
      if (cancelSimulation) {
        return;
      }
      const position = coordinates.shift();
      if (!position) {
        return;
      }
      const newDate = position.timestamp;
      simulatePositionChange(position);
      window.setTimeout(function () {
        prevDate = newDate;
        geolocate();
      }, (newDate - prevDate) / 0.5);
    }
    geolocate();
    map.on('postcompose', function () {
      map.render();
    });
    map.render();
  };

  function stopSimulation() {
    startSimulateBtn.style.display = '';
    stopSimulateBtn.style.display = 'none';
    cancelSimulation = true;
  }

  stopSimulateBtn.onclick = function () {
    stopSimulation();
  };
  geotrackerBtn.onclick = function () {
    stopSimulation();
  };

  function simulatePositionChange(position) {
    const coords = position.coords;
    const geolocation = geotracker.getGeolocation();
    geolocation.set('accuracy', coords.accuracy);
    geolocation.set('heading', degToRad(coords.heading));
    const position_ = [coords.longitude, coords.latitude];
    const projectedPosition = ol.proj.transform(position_, 'EPSG:4326', 'EPSG:3857');
    geolocation.set('position', projectedPosition);
    geolocation.set('speed', coords.speed);
    geolocation.changed();
  }
</script>


<style>
  .mapz-control-geotracker {
    display: none !important;
  }
  .map {
    height: 400px;
    font-family: "HelveticaNeue", "Helvetica";
  }

</style>


<html>
    <head>
        <link rel='stylesheet' href='https://mapz.com/api/css/ol/7.0.0/ol.css' />
        <script src='https://mapz.com/api/javascript/lib/7.0.0/ol.js' type='text/javascript'></script>
        
        
        <style>
          .mapz-control-geotracker {
            display: none !important;
          }
          .map {
            height: 400px;
            font-family: "HelveticaNeue", "Helvetica";
          }

        </style>
    </head>
    <body>
        <div id="map" class="map"></div>
        <button id="start-simulate" class="button-secondary">Start simulation</button>
        <button id="stop-simulate" class="button-secondary" style="display: none">End simulation</button>
        <script>
          // create a background layer
          const baseLayer = new ol.layer.Tile({
          	source: new ol.source.XYZ({
              attributions: ['© 2023 <a target="_blank" href="http://www.mapz.com">mapz.com </a>\
                      - Map Data: <a target="_blank" href="http://openstreetmap.org">OpenStreetMap</a>\
                      (<a href="http://opendatacommons.org/licenses/odbl/1.0/" target="_blank">ODbL</a>)'],
              tilePixelRatio: 2,
              url:'https://tiles.mapz.com/mapproxy/v1/demo-817ca352/tiles/1.0.0/mapz_multicolor_base_hq/EPSG3857/{z}/{x}/{-y}.jpeg'
            })
          });

          const map = new ol.Map({
            target: document.getElementById('map'),
            logo: false,
            layers: [
              baseLayer
            ],
            view: new ol.View({
              center: ol.proj.transform([5.868668798, 45.64444874417562], 'EPSG:4326', 'EPSG:3857'),
              zoom: 17
            })
          });

          // EnableHighAccuracy
          const geolocation = new ol.Geolocation({
            trackingOptions: {
              enableHighAccuracy: true
            }
          });

          // Create geotracker
          const geotracker = new ol.mapz.control.Geotracker({
            // define position symbol
            marker: {
              src: 'https://mapz.com/api/images/position.svg',
              // Set imgSize to fix IE11-Bug 
              imgSize: [28.346, 28.346],
              height: 60
            },
            // set style for recorded track
            trackStyle: new ol.style.Style({
              stroke: new ol.style.Stroke({
                width: 5,
                color: 'rgba(239, 130, 20, 0.5)'
              })
            }),
            //don't start tracking automatically
            autostart: false,
            // rotate view when updating position
            rotate: false,
            // enable high accuracy
            enableHighAccuracy: true
          });

          map.addControl(geotracker);

          /*
           * All of the following code is used for simulating device movement
           */

          // simulate device move
          let simulationData;
          fetch('https://mapz.com/api/data/geolocation-orientation.json')
            .then((response) => response.json())
            .then((data) => (simulationData = data.data));

          // convert degrees to radians
          function degToRad(deg) {
            return deg * Math.PI * 2 / 360;
          }

          const startSimulateBtn = document.getElementById('start-simulate');
          const stopSimulateBtn = document.getElementById('stop-simulate');
          const geotrackerBtn = document.querySelector('.mapz-control-geotracker-button');
          let cancelSimulation = false;

          startSimulateBtn.onclick = function () {
            if (!simulationData) {
              return;
            }
            cancelSimulation = false;
            startSimulateBtn.style.display = 'none';
            stopSimulateBtn.style.display = '';
            geotracker.getGeolocation().setTracking(false);
            const coordinates = simulationData;

            const first = coordinates.shift();
            simulatePositionChange(first);

            let prevDate = first.timestamp;
            function geolocate() {
              if (cancelSimulation) {
                return;
              }
              const position = coordinates.shift();
              if (!position) {
                return;
              }
              const newDate = position.timestamp;
              simulatePositionChange(position);
              window.setTimeout(function () {
                prevDate = newDate;
                geolocate();
              }, (newDate - prevDate) / 0.5);
            }
            geolocate();
            map.on('postcompose', function () {
              map.render();
            });
            map.render();
          };

          function stopSimulation() {
            startSimulateBtn.style.display = '';
            stopSimulateBtn.style.display = 'none';
            cancelSimulation = true;
          }

          stopSimulateBtn.onclick = function () {
            stopSimulation();
          };
          geotrackerBtn.onclick = function () {
            stopSimulation();
          };

          function simulatePositionChange(position) {
            const coords = position.coords;
            const geolocation = geotracker.getGeolocation();
            geolocation.set('accuracy', coords.accuracy);
            geolocation.set('heading', degToRad(coords.heading));
            const position_ = [coords.longitude, coords.latitude];
            const projectedPosition = ol.proj.transform(position_, 'EPSG:4326', 'EPSG:3857');
            geolocation.set('position', projectedPosition);
            geolocation.set('speed', coords.speed);
            geolocation.changed();
          }
        </script>
    </body>
</html>


<style>
  :host,:root{--ol-background-color:white;--ol-accent-background-color:#F5F5F5;--ol-subtle-background-color:rgba(128, 128, 128, 0.25);--ol-partial-background-color:rgba(255, 255, 255, 0.75);--ol-foreground-color:#333333;--ol-subtle-foreground-color:#666666;--ol-brand-color:#00AAFF}.ol-box{box-sizing:border-box;border-radius:2px;border:1.5px solid var(--ol-background-color);background-color:var(--ol-partial-background-color)}.ol-mouse-position{top:8px;right:8px;position:absolute}.ol-scale-line{background:var(--ol-partial-background-color);border-radius:4px;bottom:8px;left:8px;padding:2px;position:absolute}.ol-scale-line-inner{border:1px solid var(--ol-subtle-foreground-color);border-top:none;color:var(--ol-foreground-color);font-size:10px;text-align:center;margin:1px;will-change:contents,width;transition:all 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.heading-container{display:flex}.mapz-control-layerswitcher .heading-container .title{color:#fff;font-size:.9em;font-weight:700;display:inline-flex;align-items:center;padding:.5em 1em;width:100%}.mapz-control-layerswitcher .heading-container .title.closed{display:none}.mapz-control-layerswitcher .heading-container .toggle-button,.mapz-control-layerswitcher .heading-container .toggle-button:hover{color:#fff;background-color:transparent;flex-shrink:0}.mapz-control-layerswitcher .heading-container .toggle-button::before{content:'x'}.mapz-control-layerswitcher .heading-container .toggle-button.closed::before{content:unset}.mapz-control-layerswitcher .heading-container .toggle-button.closed{display:block;background-image:url('data:image/svg+xml;base64,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');background-color:rgba(39,44,49,.9)}.mapz-control-layerswitcher .layers-container{margin-top:0;padding:.5em .75em .5em .75em;-moz-user-select:none;-khtml-user-select:none;-webkit-user-select:none;-o-user-select:none}.mapz-control-layerswitcher .layers-container::empty{padding:0}.mapz-control-layerswitcher .layers-container.closed{display:none}.mapz-control-layerswitcher input{margin:.2em .7em .2em 0;font-size:.75em;cursor:pointer;vertical-align:middle}.mapz-control-layerswitcher label{cursor:pointer}.mapz-control-layerswitcher span{color:#fff;font-weight:700;font-size:.75em}.mapz-control-search{margin:8px;width:40%}.mapz-control-search input{border:0;font:inherit;height:2em;padding:0;width:100%;font-size:16px;font-weight:700;border-radius:4px;color:rgb(70,70,70);padding:0 .5em 0 .5em}.mapz-control-search input:focus{border-color:none;box-shadow:none;outline:0}.search-input-container.nominatim{display:flex}.mapz-control-search .search-suffix-container{align-items:center;display:flex;height:2em}.mapz-control-search .search-suffix-container .clear-button{margin:0 0 0 8px}.search-input-container .search-suffix-container .requesting{background-image:url('data:image/gif;base64,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');background-position:center;background-color:rgba(39,44,49,.9);margin:0 0 0 8px;width:1.375em;height:1.375em}.search-input-container .search-suffix-container .clear-button{background-image:url('data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0iMS4wIiA/PjxzdmcgYmFzZVByb2ZpbGU9InRpbnkiIHdpZHRoPSIxOHB4IiBoZWlnaHQ9IjE4cHgiIHZlcnNpb249IjEuMiIgdmlld0JveD0iMCAwIDI0IDI0IiBmaWxsPSJ3aGl0ZSIgeG1sOnNwYWNlPSJwcmVzZXJ2ZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxuczp4bGluaz0iaHR0cDovL3d3dy53My5vcmcvMTk5OS94bGluayI+PGc+PHBhdGggZD0iTTUuMjkzIDYuNzA3bDUuMjkzIDUuMjkzLTUuMjkzIDUuMjkzYy0wLjM5MSAwLjM5MS0wLjM5MSAxLjAyNCAwIDEuNDE0czEuMDI0IDAuMzkxIDEuNDE0IDBsNS4yOTMtNS4yOTMgNS4yOTMgNS4yOTNjMC4zOTEgMC4zOTEgMS4wMjQgMC4zOTEgMS40MTQgMHMwLjM5MS0xLjAyNCAwLTEuNDE0bC01LjI5My01LjI5MyA1LjI5My01LjI5M2MwLjM5MS0wLjM5MSAwLjM5MS0xLjAyNCAwLTEuNDE0cy0xLjAyNC0wLjM5MS0xLjQxNCAwbC01LjI5MyA1LjI5My01LjI5My01LjI5M2MtMC4zOTEtMC4zOTEtMS4wMjQtMC4zOTEtMS40MTQgMHMtMC4zOTEgMS4wMjQgMCAxLjQxNHoiLz48L2c+PC9zdmc+');background-position:center}.mapz-control-search .search-results{margin-top:.3em;background-clip:padding-box;background-color:#fff;border:1px solid #d9d9d9;border-radius:4px;box-shadow:0 2px 4px 0 rgba(169,169,169,.5);height:auto;max-height:30vh;overflow-y:auto;padding:5px 5px;width:95%;box-sizing:border-box;font-family:HelveticaNeue,Helvetica}.ol-control.mapz-control-search .search-results{position:relative}.search-results div{background-color:none;padding:5px 5px;cursor:pointer;margin:5px 5px;border-bottom:1px solid #d9d9d9;color:#464646;font-size:16px}.search-results div span.description,.search-results div span.name{display:block}.search-results div:hover{background-color:#f2f2f2;border-radius:4px}.search-results div.no-results,.search-results div.no-results:hover{border:0}
</style>

Code examples

Map integrations

Elements

Marker and text overlays

Additional data integration

Interactive functions

Search functions

Focuses of other
pages: