我创建了第一个带有png叠加层的Google Map API(感谢@andresf的帮助).
这张地图有多个彼此相邻的地面覆盖层,可以在http://www.earthstation.mobi/coverage.htm上看到.
问题:如何在每个叠加上设置不透明度(透明度？),以便我可以在叠加下看到地图细节？我不需要从网页上调整它,编码到脚本中的预设就足够了.
上面列出的页面代码是:
<!DOCTYPE html "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<title>Earthstation WIMAX Coverage</title>
<script src="http://maps.googleapis.com/maps/api/js?key=MY_API_KEY&sensor=false"
type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
var myOptions = {
center: new google.maps.LatLng(-18.975750, 32.669184),
zoom: 13,
mapTypeId: google.maps.MapTypeId.HYBRID
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
//note to self co-ords are SW and then NE
var imageBounds = new google.maps.LatLngBounds(
new google.maps.LatLng(-19.000417,30.999583),
new google.maps.LatLng(-17.999583,32.000417));
var oldmap = new google.maps.GroundOverlay(
"http://www.earthstation.mobi/cloakpS19E031.png",imageBounds);
oldmap.setMap(map);
var imageBounds2 …