Computes the time at confluent from a Google Location History Export

readme.md

Computes the time at confluent from a Google Location History Export

index.html

<a href="https://takeout.google.com/settings/takeout/custom/location_history">Get your location data from here</a>, don't forget to extract the .json file.
<br><br>
Lat: <input type="number" id="lat" value="46.2854826"> Lon: <input type="number" id="lon" value="-119.2767022">

<br><br>
<script>
  var lat = 46.2854826;
  var lon = -119.2767022;

  function distance(lat1, lon1, lat2, lon2, unit) {
  	var radlat1 = Math.PI * lat1/180
  	var radlat2 = Math.PI * lat2/180
  	var theta = lon1-lon2
  	var radtheta = Math.PI * theta/180
  	var dist = Math.sin(radlat1) * Math.sin(radlat2) + Math.cos(radlat1) * Math.cos(radlat2) * Math.cos(radtheta);
  	dist = Math.acos(dist)
  	dist = dist * 180/Math.PI
  	dist = dist * 60 * 1.1515
  	if (unit=="K") { dist = dist * 1.609344 }
  	if (unit=="N") { dist = dist * 0.8684 }
  	return dist
  }

  function load() {
    lat = Number(document.getElementById('lat').value);
    lon = Number(document.getElementById('lon').value);

    console.log('File Changed');
    var files = window.event.target.files; // FileList object

    var reader = new FileReader();

    // Closure to capture the file information.
    reader.onload = function(e) {
        console.log("Loaded");
        document.getElementById('list').innerHTML = 'Parsing file...';
        setTimeout(function(){
          var thing = JSON.parse(e.target.result);
          console.log("Parsed");
          console.log(thing.locations[0]);

          document.getElementById('list').innerHTML = 'Sorting locations by time...';
          setTimeout(function(){
            thing.locations.sort(function(a,b){
              return Number(a.timestampMs) - Number(b.timestampMs);
            });

            console.log("Sorted");

            var output = [];
            var matches = 0;
            var lastTime = 0;
            var totalTime = 0;
            for (var i = 0; i < thing.locations.length; i++) {
              var location = thing.locations[i];
              var d = distance(location.latitudeE7 / 1e7,location.longitudeE7 / 1e7,lat,lon);
              var time = Number(location.timestampMs)

              if(d < 0.1) {
                totalTime += time - lastTime;

                output.push('<li><strong style="width:30px; display:inline-block;">', matches++, '</strong> -- ',
                  d.toFixed(4), ' ~~ ', location.accuracy, ' == ', (totalTime / 3.6e+6),
                  '</li>');
              } else {

              }

              lastTime = time;
            }

            output.unshift('<li></li>');
            output.unshift('<li>Total Time: About ',(totalTime / 3.6e+6).toFixed(1),' hours</li>');
            document.getElementById('list').innerHTML = '<ul>' + output.join('') + '</ul>';
          },0);
        },0);
    };

    // Read in the image file as a data URL.
    document.getElementById('list').innerHTML = 'Reading file...';
    reader.readAsText(files[0]);
  }
</script>

<input type="file" onChange="load()">

<div id="list"></div>