我创建了我的第一个谷歌地图API与PNG覆盖(感谢@andresf寻求帮助)。
这个地图有彼此相邻的多个PNG地面覆盖,并且可以在可见http://www.earthstation.mobi/coverage.htm
问:我如何在每个覆盖设置不透明度(透明度?),这样我可以看到覆盖下的详细地图? 我并不需要从网页调整此,编码到脚本预设就足够了。
上面列出的网页的代码是:
<!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 = new google.maps.LatLngBounds(
new google.maps.LatLng(-19.000417,31.999583),
new google.maps.LatLng(-17.999583,33.000417));
var oldmap = new google.maps.GroundOverlay(
"http://www.earthstation.mobi/cloakpS19E032.png",imageBounds2);
oldmap.setMap(map);
var imageBounds3 = new google.maps.LatLngBounds(
new google.maps.LatLng(-20.000417,30.999583),
new google.maps.LatLng(-18.999583,32.000417));
var oldmap = new google.maps.GroundOverlay(
"http://www.earthstation.mobi/cloakpS20E031.png",imageBounds3);
oldmap.setMap(map);
var imageBounds4 = new google.maps.LatLngBounds(
new google.maps.LatLng(-20.000417,31.999583),
new google.maps.LatLng(-18.999583,33.000417));
var oldmap = new google.maps.GroundOverlay(
"http://www.earthstation.mobi/cloakpS20E032.png",imageBounds4);
oldmap.setMap(map);
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width: 1000px; height: 600px"></div>
</body>
</html>