javascript - 提高 GPS 的准确性(在 HTML5 地理定位中)

Question

如何在此代码中提高 GPS 的准确性？

var map;

function initialize() {
  var mapOptions = {
    zoom: 18
  };
  map = new google.maps.Map(document.getElementById('map-canvas'),
      mapOptions);

  // Try HTML5 geolocation
  if(navigator.geolocation) {
    navigator.geolocation.getCurrentPosition(function(position) {
      var pos = new google.maps.LatLng(position.coords.latitude,
                                       position.coords.longitude);


      var marker = new google.maps.Marker({
          position: pos,
          map: map,
          title: 'You Are Here'

      });

      map.setCenter(pos);
    }, function() {
      handleNoGeolocation(true);
    });
  } else {
    // Browser doesn't support Geolocation
    handleNoGeolocation(false);
  }

}

有办法吗？我知道使用 EnableHighAccuracy: true 是可能的，但我不知道我把这个命令放在哪里。有人有解决办法吗？

Answer 1

引用表格 Geolocation API spec :

interface Geolocation { 
       void getCurrentPosition(PositionCallback successCallback,
                               optional PositionErrorCallback errorCallback,
                               optional PositionOptions options)
       [...]
  }

[...]

The enableHighAccuracy attribute provides a hint that the application would like to receive the best possible results.

这意味着您可以像这样将其作为最后一个参数传递给对象(最小示例):

navigator.geolocation.getCurrentPosition(
    function(position) { console.log(position); }, // Success callback
    function() {}, // Error callback
    {enableHighAccuracy: true} // Position Options
);