IGC Data

This example uses OpenLayers v4.0.1. The latest is v.

#### IGC Data

Example of tracks recorded from multiple paraglider flights on the same day, read from an IGC file.

The five tracks contain a total of 49,707 unique coordinates. Zoom in to see more detail. The background layer is from OpenCycleMap.

Related API documentation:

- ol.Feature
,
- ol.Map
,
- ol.View
,
- ol.control
,
- ol.format.IGC
,
- ol.geom.LineString
,
- ol.geom.Point
,
- ol.layer.Tile
,
- ol.layer.Vector
,
- ol.source.OSM
,
- ol.source.Vector
,
- ol.style.Circle
,
- ol.style.Fill
,
- ol.style.Stroke
,
- ol.style.Style

Copy Edit
IGC Data Example of tracks recorded from multiple paraglider flights on the same day, read from an IGC file. var colors = { 'Clement Latour': 'rgba(0, 0, 255, 0.7)', 'Damien de Baesnt': 'rgba(0, 215, 255, 0.7)', 'Sylvain Dhonneur': 'rgba(0, 165, 255, 0.7)', 'Tom Payne': 'rgba(0, 255, 255, 0.7)', 'Ulrich Prinz': 'rgba(0, 215, 255, 0.7)' }; var styleCache = {}; var styleFunction = function(feature) { var color = colors[feature.get('PLT')]; var style = styleCache[color]; if (!style) { style = new ol.style.Style({ stroke: new ol.style.Stroke({ color: color, width: 3 }) }); styleCache[color] = style; } return style; }; var vectorSource = new ol.source.Vector(); var igcUrls = [ 'https://openlayers.org/en/v4.0.1/examples/data/igc/Clement-Latour.igc', 'https://openlayers.org/en/v4.0.1/examples/data/igc/Damien-de-Baenst.igc', 'https://openlayers.org/en/v4.0.1/examples/data/igc/Sylvain-Dhonneur.igc', 'https://openlayers.org/en/v4.0.1/examples/data/igc/Tom-Payne.igc', 'https://openlayers.org/en/v4.0.1/examples/data/igc/Ulrich-Prinz.igc' ]; function get(url, callback) { var client = new XMLHttpRequest(); client.open('GET', url); client.onload = function() { callback(client.responseText); }; client.send(); } var igcFormat = new ol.format.IGC(); for (var i = 0; i < igcUrls.length; ++i) { get(igcUrls[i], function(data) { var features = igcFormat.readFeatures(data, {featureProjection: 'EPSG:3857'}); vectorSource.addFeatures(features); }); } var time = { start: Infinity, stop: -Infinity, duration: 0 }; vectorSource.on('addfeature', function(event) { var geometry = event.feature.getGeometry(); time.start = Math.min(time.start, geometry.getFirstCoordinate()[2]); time.stop = Math.max(time.stop, geometry.getLastCoordinate()[2]); time.duration = time.stop - time.start; }); var map = new ol.Map({ layers: [ new ol.layer.Tile({ source: new ol.source.OSM({ attributions: [ 'All maps © <a href="https://www.opencyclemap.org/">OpenCycleMap</a>', ol.source.OSM.ATTRIBUTION ], url: 'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' + '?apikey=Your API key from http://www.thunderforest.com/docs/apikeys/ here' }) }), new ol.layer.Vector({ source: vectorSource, style: styleFunction }) ], target: 'map', controls: ol.control.defaults({ attributionOptions: /** @type {olx.control.AttributionOptions} */ ({ collapsible: false }) }), view: new ol.View({ center: [703365.7089403362, 5714629.865071137], zoom: 9 }) }); var point = null; var line = null; var displaySnap = function(coordinate) { var closestFeature = vectorSource.getClosestFeatureToCoordinate(coordinate); var info = document.getElementById('info'); if (closestFeature === null) { point = null; line = null; info.innerHTML = '&nbsp;'; } else { var geometry = closestFeature.getGeometry(); var closestPoint = geometry.getClosestPoint(coordinate); if (point === null) { point = new ol.geom.Point(closestPoint); } else { point.setCoordinates(closestPoint); } var date = new Date(closestPoint[2] * 1000); info.innerHTML = closestFeature.get('PLT') + ' (' + date.toUTCString() + ')'; var coordinates = [coordinate, [closestPoint[0], closestPoint[1]]]; if (line === null) { line = new ol.geom.LineString(coordinates); } else { line.setCoordinates(coordinates); } } map.render(); }; map.on('pointermove', function(evt) { if (evt.dragging) { return; } var coordinate = map.getEventCoordinate(evt.originalEvent); displaySnap(coordinate); }); map.on('click', function(evt) { displaySnap(evt.coordinate); }); var stroke = new ol.style.Stroke({ color: 'rgba(255,0,0,0.9)', width: 1 }); var style = new ol.style.Style({ stroke: stroke, image: new ol.style.Circle({ radius: 5, fill: null, stroke: stroke }) }); map.on('postcompose', function(evt) { var vectorContext = evt.vectorContext; vectorContext.setStyle(style); if (point !== null) { vectorContext.drawGeometry(point); } if (line !== null) { vectorContext.drawGeometry(line); } }); var featureOverlay = new ol.layer.Vector({ source: new ol.source.Vector(), map: map, style: new ol.style.Style({ image: new ol.style.Circle({ radius: 5, fill: new ol.style.Fill({ color: 'rgba(255,0,0,0.9)' }) }) }) }); document.getElementById('time').addEventListener('input', function() { var value = parseInt(this.value, 10) / 100; var m = time.start + (time.duration * value); vectorSource.forEachFeature(function(feature) { var geometry = /** @type {ol.geom.LineString} */ (feature.getGeometry()); var coordinate = geometry.getCoordinateAtM(m, true); var highlight = feature.get('highlight'); if (highlight === undefined) { highlight = new ol.Feature(new ol.geom.Point(coordinate)); feature.set('highlight', highlight); featureOverlay.getSource().addFeature(highlight); } else { highlight.getGeometry().setCoordinates(coordinate); } }); map.render(); }); <div id="map" class="map"></div> <input id="time" type="range" value="0" steps="1" /> <div id="info">&nbsp;</div>

    <!DOCTYPE html>
    <html>
      <head>
        <title>IGC Data</title>
        <link rel="stylesheet" href="https://openlayers.org/en/v4.0.1/css/ol.css" type="text/css">
        <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
        <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
        <script src="https://openlayers.org/en/v4.0.1/build/ol.js"></script>
      </head>
      <body>
        <div id="map" class="map"></div>
        <input id="time" type="range" value="0" steps="1" />
        <div id="info">&nbsp;</div>
        <script>
          var colors = {
            'Clement Latour': 'rgba(0, 0, 255, 0.7)',
            'Damien de Baesnt': 'rgba(0, 215, 255, 0.7)',
            'Sylvain Dhonneur': 'rgba(0, 165, 255, 0.7)',
            'Tom Payne': 'rgba(0, 255, 255, 0.7)',
            'Ulrich Prinz': 'rgba(0, 215, 255, 0.7)'
          };

          var styleCache = {};
          var styleFunction = function(feature) {
            var color = colors[feature.get('PLT')];
            var style = styleCache[color];
            if (!style) {
              style = new ol.style.Style({
                stroke: new ol.style.Stroke({
                  color: color,
                  width: 3
                })
              });
              styleCache[color] = style;
            }
            return style;
          };

          var vectorSource = new ol.source.Vector();

          var igcUrls = [
            'https://openlayers.org/en/v4.0.1/examples/data/igc/Clement-Latour.igc',
            'https://openlayers.org/en/v4.0.1/examples/data/igc/Damien-de-Baenst.igc',
            'https://openlayers.org/en/v4.0.1/examples/data/igc/Sylvain-Dhonneur.igc',
            'https://openlayers.org/en/v4.0.1/examples/data/igc/Tom-Payne.igc',
            'https://openlayers.org/en/v4.0.1/examples/data/igc/Ulrich-Prinz.igc'
          ];

          function get(url, callback) {
            var client = new XMLHttpRequest();
            client.open('GET', url);
            client.onload = function() {
              callback(client.responseText);
            };
            client.send();
          }

          var igcFormat = new ol.format.IGC();
          for (var i = 0; i < igcUrls.length; ++i) {
            get(igcUrls[i], function(data) {
              var features = igcFormat.readFeatures(data,
                  {featureProjection: 'EPSG:3857'});
              vectorSource.addFeatures(features);
            });
          }

          var time = {
            start: Infinity,
            stop: -Infinity,
            duration: 0
          };
          vectorSource.on('addfeature', function(event) {
            var geometry = event.feature.getGeometry();
            time.start = Math.min(time.start, geometry.getFirstCoordinate()[2]);
            time.stop = Math.max(time.stop, geometry.getLastCoordinate()[2]);
            time.duration = time.stop - time.start;
          });

          var map = new ol.Map({
            layers: [
              new ol.layer.Tile({
                source: new ol.source.OSM({
                  attributions: [
                    'All maps © <a href="https://www.opencyclemap.org/">OpenCycleMap</a>',
                    ol.source.OSM.ATTRIBUTION
                  ],
                  url: 'https://{a-c}.tile.thunderforest.com/cycle/{z}/{x}/{y}.png' +
                      '?apikey=Your API key from http://www.thunderforest.com/docs/apikeys/ here'
                })
              }),
              new ol.layer.Vector({
                source: vectorSource,
                style: styleFunction
              })
            ],
            target: 'map',
            controls: ol.control.defaults({
              attributionOptions: /** @type {olx.control.AttributionOptions} */ ({
                collapsible: false
              })
            }),
            view: new ol.View({
              center: [703365.7089403362, 5714629.865071137],
              zoom: 9
            })
          });

          var point = null;
          var line = null;
          var displaySnap = function(coordinate) {
            var closestFeature = vectorSource.getClosestFeatureToCoordinate(coordinate);
            var info = document.getElementById('info');
            if (closestFeature === null) {
              point = null;
              line = null;
              info.innerHTML = '&nbsp;';
            } else {
              var geometry = closestFeature.getGeometry();
              var closestPoint = geometry.getClosestPoint(coordinate);
              if (point === null) {
                point = new ol.geom.Point(closestPoint);
              } else {
                point.setCoordinates(closestPoint);
              }
              var date = new Date(closestPoint[2] * 1000);
              info.innerHTML =
                  closestFeature.get('PLT') + ' (' + date.toUTCString() + ')';
              var coordinates = [coordinate, [closestPoint[0], closestPoint[1]]];
              if (line === null) {
                line = new ol.geom.LineString(coordinates);
              } else {
                line.setCoordinates(coordinates);
              }
            }
            map.render();
          };

          map.on('pointermove', function(evt) {
            if (evt.dragging) {
              return;
            }
            var coordinate = map.getEventCoordinate(evt.originalEvent);
            displaySnap(coordinate);
          });

          map.on('click', function(evt) {
            displaySnap(evt.coordinate);
          });

          var stroke = new ol.style.Stroke({
            color: 'rgba(255,0,0,0.9)',
            width: 1
          });
          var style = new ol.style.Style({
            stroke: stroke,
            image: new ol.style.Circle({
              radius: 5,
              fill: null,
              stroke: stroke
            })
          });
          map.on('postcompose', function(evt) {
            var vectorContext = evt.vectorContext;
            vectorContext.setStyle(style);
            if (point !== null) {
              vectorContext.drawGeometry(point);
            }
            if (line !== null) {
              vectorContext.drawGeometry(line);
            }
          });

          var featureOverlay = new ol.layer.Vector({
            source: new ol.source.Vector(),
            map: map,
            style: new ol.style.Style({
              image: new ol.style.Circle({
                radius: 5,
                fill: new ol.style.Fill({
                  color: 'rgba(255,0,0,0.9)'
                })
              })
            })
          });

          document.getElementById('time').addEventListener('input', function() {
            var value = parseInt(this.value, 10) / 100;
            var m = time.start + (time.duration * value);
            vectorSource.forEachFeature(function(feature) {
              var geometry = /** @type {ol.geom.LineString} */ (feature.getGeometry());
              var coordinate = geometry.getCoordinateAtM(m, true);
              var highlight = feature.get('highlight');
              if (highlight === undefined) {
                highlight = new ol.Feature(new ol.geom.Point(coordinate));
                feature.set('highlight', highlight);
                featureOverlay.getSource().addFeature(highlight);
              } else {
                highlight.getGeometry().setCoordinates(coordinate);
              }
            });
            map.render();
          });
        </script>
      </body>
    </html>