这实际上可以通过使用 Maps API 方向渲染器轻松完成。
您必须提供街道起点和终点的纬度/经度坐标,渲染器会为您完成所有计算和绘制。您不需要阅读方向步骤并自己绘制折线!
在这里查看它的实际效果:
http://jsfiddle.net/HG7SV/15/ http://jsfiddle.net/HG7SV/15/
这是代码,所有的魔法都是在函数initialize()中完成的:
<html>
<head>
<style type="text/css">
html { height: 100% }
body { height: 100%; margin: 0px; padding: 0px }
#map_canvas { height: 100% }
</style>
<script type="text/javascript"
src="http://maps.google.com/maps/api/js?sensor=false">
</script>
<script type="text/javascript">
function initialize() {
// init map
var myOptions = {
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
// init directions service
var dirService = new google.maps.DirectionsService();
var dirRenderer = new google.maps.DirectionsRenderer({suppressMarkers: true});
dirRenderer.setMap(map);
// highlight a street
var request = {
origin: "48.1252,11.5407",
destination: "48.13376,11.5535",
travelMode: google.maps.TravelMode.DRIVING
};
dirService.route(request, function(result, status) {
if (status == google.maps.DirectionsStatus.OK) {
dirRenderer.setDirections(result);
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="map_canvas" style="width:100%; height:100%"></div>
</body>
</html>
如果您的街道是弯曲的,并且渲染器应该找到您不想要的快捷方式,则可以通过添加中间路点来轻松修改,以强制绘制的线精确到您想要的街道:
var request = {
origin: "48.1252,11.5407",
destination: "48.13376,11.5535",
waypoints: [{location:"48.12449,11.5536"}, {location:"48.12515,11.5569"}],
travelMode: google.maps.TravelMode.DRIVING
};