Javascript 谷歌将Json映射到GPX

我试图从google timeline获取坐标，将其转换为gpx格式。是否存在可以从谷歌地图时间轴提取时间和位置的Api

json文件如下所示：

{
  "locations" : [{
    "timestampMs" : "1383767355903",
    "latitudeE7" : 481848021,
    "longitudeE7" : 112554011,
    "accuracy" : 100
  }, {
    "timestampMs" : "1383767295887",
    "latitudeE7" : 481848003,
    "longitudeE7" : 112554027,
    "accuracy" : 100
  }]
}

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我认为你有谷歌像素的坐标，你需要把这个坐标转换成latlong

function latLng2Point(latLng, map) {
  var topRight = map.getProjection().fromLatLngToPoint(map.getBounds().getNorthEast());
  var bottomLeft = map.getProjection().fromLatLngToPoint(map.getBounds().getSouthWest());
  var scale = Math.pow(2, map.getZoom());
  var worldPoint = map.getProjection().fromLatLngToPoint(latLng);
  return new google.maps.Point((worldPoint.x - bottomLeft.x) * scale, (worldPoint.y - topRight.y) * scale);
}

function point2LatLng(point, map) {
  var topRight = map.getProjection().fromLatLngToPoint(map.getBounds().getNorthEast());
  var bottomLeft = map.getProjection().fromLatLngToPoint(map.getBounds().getSouthWest());
  var scale = Math.pow(2, map.getZoom());
  var worldPoint = new google.maps.Point(point.x / scale + bottomLeft.x, point.y / scale + topRight.y);
  return map.getProjection().fromPointToLatLng(worldPoint);
}