具有多个停靠点/航点的 Google Maps Route API
Rah*_*Jat 2 javascript jquery google-maps google-maps-api-3
我正在尝试使用 Google Maps API 在多个站点之间绘制源和目的地之间的路线。我将传递源、目的地和所有停靠点的纬度和日志值。我尝试使用基本代码段，但代码（如下）在每个停靠点之间绘制了一条路线。
[![<script type="text/javascript">
var markers = [
{
"timestamp": 'Alibaug',
"latitude": '18.641400',
"longitude": '72.872200',
"description": 'Alibaug is a coastal town and a municipal council in Raigad District in the Konkan region of Maharashtra, India.'
},
{
"timestamp": 'Mumbai',
"latitude": '18.964700',
"longitude": '72.825800',
"description": 'Mumbai formerly Bombay, is the capital city of the Indian state of Maharashtra.'
}
,
{
"timestamp": 'Pune',
"latitude": '18.523600',
"longitude": '73.847800',
"description": 'Pune is the seventh largest metropolis in India, the second largest in the state of Maharashtra after Mumbai.'
}
\];
window.onload = function () {
var mapOptions = {
center: new google.maps.LatLng(markers\[0\].latitude, markers\[0\].longitude),
zoom: 10,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("dvMap"), mapOptions);
var infoWindow = new google.maps.InfoWindow();
var lat_lng = new Array();
var latlngbounds = new google.maps.LatLngBounds();
for (i = 0; i < markers.length; i++) {
var data = markers\[i\]
var myLatlng = new google.maps.LatLng(data.latitude, data.longitude);
lat_lng.push(myLatlng);
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title: data.timestamp
});
// console.log(i)
latlngbounds.extend(marker.position);
(function (marker, data) {
google.maps.event.addListener(marker, "click", function (e) {
infoWindow.setContent(data.timestamp);
infoWindow.open(map, marker);
});
})(marker, data);
}
map.setCenter(latlngbounds.getCenter());
map.fitBounds(latlngbounds);
//***********ROUTING****************//
//Initialize the Path Array
var path = new google.maps.MVCArray();
//Initialize the Direction Service
var service = new google.maps.DirectionsService();
//Set the Path Stroke Color
var poly = new google.maps.Polyline({ map: map, strokeColor: '#4986E7' });
//Loop and Draw Path Route between the Points on MAP
for (var i = 0; i < lat_lng.length; i++) {
if ((i + 1) < lat_lng.length) {
var src = lat_lng\[i\];
var des = lat_lng\[i + 1\];
path.push(src);
poly.setPath(path);
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.WALKING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
for (var i = 0, len = result.routes\[0\].overview_path.length; i < len; i++) {
path.push(result.routes\[0\].overview_path\[i\]);
}
}
});
}
}
}
</script>][1]][1]
在上图中，绘制了一条额外的路线。
您的代码中有拼写错误/错误。删除这一行：
path.push(src);
从这个循环：
//Loop and Draw Path Route between the Points on MAP
for (var i = 0; i < lat_lng.length; i++) {
if ((i + 1) < lat_lng.length) {
var src = lat_lng[i];
var des = lat_lng[i + 1];
// path.push(src); <============================================ here
poly.setPath(path);
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.WALKING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});
}
}
第二个问题来自方向服务的异步特性。不能保证服务响应的顺序与发送请求的顺序相同。解决这个问题的最简单方法是为每个结果创建一个单独的折线：
function(result, status) {
if (status == google.maps.DirectionsStatus.OK) {
//Initialize the Path Array
var path = new google.maps.MVCArray();
//Set the Path Stroke Color
var poly = new google.maps.Polyline({
map: map,
strokeColor: '#4986E7'
});
poly.setPath(path);
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});
代码片段：
path.push(src);
//Loop and Draw Path Route between the Points on MAP
for (var i = 0; i < lat_lng.length; i++) {
if ((i + 1) < lat_lng.length) {
var src = lat_lng[i];
var des = lat_lng[i + 1];
// path.push(src); <============================================ here
poly.setPath(path);
service.route({
origin: src,
destination: des,
travelMode: google.maps.DirectionsTravelMode.WALKING
}, function (result, status) {
if (status == google.maps.DirectionsStatus.OK) {
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});
}
}
function(result, status) {
if (status == google.maps.DirectionsStatus.OK) {
//Initialize the Path Array
var path = new google.maps.MVCArray();
//Set the Path Stroke Color
var poly = new google.maps.Polyline({
map: map,
strokeColor: '#4986E7'
});
poly.setPath(path);
for (var i = 0, len = result.routes[0].overview_path.length; i < len; i++) {
path.push(result.routes[0].overview_path[i]);
}
}
});