我正在尝试使用 Google Maps API 创建热图。我得到的是地图,但不是坐标上的热值。给出下面的代码:
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no" />
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0; padding: 0 }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="https://maps.googleapis.com/maps/api/js?key=APIKEY&sensor=true">
</script>
<script type="text/javascript">
function initialize() {
var mapOptions = {
zoom: 3,
center: new google.maps.LatLng(8.881928, 76.592758),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
var map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
}
function loadScript() {
var script = document.createElement("script");
script.type = "text/javascript";
script.src = "http://maps.googleapis.com/maps/api/js?key=APIKEY&sensor=true&callback=initialize";
document.body.appendChild(script);
}
window.onload = loadScript;
</script>
<script>
var heatMapData = [
{location: new google.maps.LatLng(8.8678, 76.5623 },
{location: new google.maps.LatLng(9.5674, 77.5623)},
{location: new google.maps.LatLng(10.7821, 78.447)},
{location: new google.maps.LatLng(12.4523, 79.443)},
{location: new google.maps.LatLng(37.782, -122.441)},
{location: new google.maps.LatLng(37.782, -122.439)},
{location: new google.maps.LatLng(37.782, -122.435)},
{location: new google.maps.LatLng(37.785, -122.447)},
{location: new google.maps.LatLng(37.785, -122.445)},
{location: new google.maps.LatLng(37.785, -122.441)},
{location: new google.maps.LatLng(37.785, -122.437)},
{location: new google.maps.LatLng(37.785, -122.435)}
];
var heatmap = new google.maps.visualization.HeatmapLayer({
data: heatMapData
});
heatmap.setOptions({radius: heatmap.get('20')});
heatmap.setMap(map);
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
这是输出的屏幕截图。有人可以帮我吗?