相关疑难解决方法(0)

我有一个在线地图,其中包含地面叠加图像,并希望使图像半透明,以便基本地图显示出来.是否可以为此叠加层添加透明度值？

http://www.tpwd.state.tx.us/fishboat/fish/recreational/lakes/ingulf1c.phtml

这是地面叠加层的代码:

var imageBounds = new google.maps.LatLngBounds(
  new google.maps.LatLng(25.71438633861514, -98.33555959121725),
  new google.maps.LatLng(30.40813339247205, -93.57953893270167));


function initialize() {
  var map = new google.maps.Map(document.getElementById("map"), {
    center: new google.maps.LatLng(28.0041,-96.3618),
    zoom: 7,
    mapTypeId: 'roadmap'
  });
  overlay = new google.maps.GroundOverlay(
  '/fishboat/fish/recreational/lakes/images/statemaps/gulfregion.gif',
  imageBounds);
  overlay.setMap(map);