通过google API 查询路线
google APi主要通过DirectionsService这个类来实现路线的查询,可以直接传入两个地点的名称作为参数来查询,也可以传入坐标来查询,直接上代码
<html>
<head></head>
<div id="map-canvas" style="width:1000px;height:1000px"></div>
<div>
<strong>Mode of Travel: </strong>
<select id="mode" onchange="calcRoute();">
<option value="DRIVING">Driving</option>
<option value="WALKING">Walking</option>
<option value="BICYCLING">Bicycling</option>
<option value="TRANSIT">Transit</option>
</select>
</div>
</html>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?key=&sensor=true"></script> //引入googel的API
<script type="text/javascript">
var directionsDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
var haight = new google.maps.LatLng(22.278619, 114.153301); //这里用坐标初始化要查询的两个地点之间的经纬度
var oceanBeach = new google.maps.LatLng(22.281044, 114.159785);
//初始化的方法
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
//初始化地图的选项
var mapOptions = {
zoom: 14,
mapTypeId: google.maps.MapTypeId.ROADMAP,
center: haight
}
map = new google.maps.Map(document.getElementById("map-canvas"), mapOptions);
directionsDisplay.setMap(map);
}
//计算路径的方法
function calcRoute() {
var selectedMode = document.getElementById("mode").value;
var request = {
origin: haight, //这里也可以传入字符串 如 '西直门,西三旗'
destination: oceanBeach,
travelMode: google.maps.TravelMode[selectedMode] //这里选择方式 DRIVING WALKING BICYCLING TRANSIT四种方式
};
//从服务器传回的结果
directionsService.route(request, function(response, status) {
console.log(response);
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
}
});
}
google.maps.event.addDomListener(window, 'load', initialize);
</script>
