我有2个地方的lat / lon。如何从谷歌地图api获取路线？我想显示地图和路线文字。
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<link href="http://code.google.com/apis/maps/documentation/javascript/examples/default.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
var directionDisplay;
var directionsService = new google.maps.DirectionsService();
var map;
function initialize() {
directionsDisplay = new google.maps.DirectionsRenderer();
var myOptions = {
mapTypeId: google.maps.MapTypeId.ROADMAP,
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
directionsDisplay.setMap(map);
var start = '37.7683909618184, -122.51089453697205';
var end = '41.850033, -87.6500523';
var request = {
origin:start,
destination:end,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
var myRoute = response.routes[0];
var txtDir = '';
for (var i=0; i<myRoute.legs[0].steps.length; i++) {
txtDir += myRoute.legs[0].steps[i].instructions+"<br />";
}
document.getElementById('directions').innerHTML = txtDir;
}
});
}
</script>
</head>
<body onload="initialize()">
<div id="directions" style="width:500px;height:500px;float:left"></div>
<div id="map_canvas" style="width:500px;height:500px;"></div>
</body>
</html>
或使用以前的代码：
…
var start = new google.maps.LatLng('37.7683909618184', '-122.51089453697205');
var end = new google.maps.LatLng('41.850033', '-87.6500523');
var request = {
origin:start,
destination:end,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function(response, status) {
…
}
…
这样，坐标直接被识别，而不是从字符串中评估。
还有另一种解决方案：将对象传递到原点和目的地
{lat: 39.904309, lng: 116.385871}