所以我想计算我的起点和多点之间的距离,而不是显示到这一点的最短路线,但它始终显示我的最后一点。这是我的distanceCal函数,它工作正常:
function getDistanceFromLatLonInKm(lat1, lon1, lat2, lon2) {
var R = 6371; // Radius of the earth in km
var dLat = deg2rad(lat2 - lat1); // deg2rad below
var dLon = deg2rad(lon2 - lon1);
var a =
Math.sin(dLat / 2) * Math.sin(dLat / 2) +
Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
Math.sin(dLon / 2) * Math.sin(dLon / 2)
;
var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
var d = R * c; // Distance in km
return d;
}
function deg2rad(deg) {
return deg * (Math.PI / 180)
}
这是我的点/长:
var dist = [
[35.733972, -5.881999],
[ 35.734077, -5.881033],
[ 35.736898, -5.877771],
[35.738396, -5.875154]
];
然后我的脚本显示方向:
function calcRoute() {
var start = new google.maps.LatLng(35.728329, -5.882750);
for (var i = 0; i < dist.length; i++)
{
var dis = dist[i];
//here i need something to choose the shortest route
var min = Math.min(getDistanceFromLatLonInKm(35.728329, -5.882750, dis[0], dis[1]));
var end = new google.maps.LatLng(dis[0], dis[1]);
}
var request = {
origin: start,
destination: end,
optimizeWaypoints: true,
travelMode: google.maps.DirectionsTravelMode.DRIVING
};
directionsService.route(request, function (response, status) {
if (status == google.maps.DirectionsStatus.OK) {
directionsDisplay.setDirections(response);
}
});
}
google.maps.event.addDomListener(window, 'load', getMap);
所以,如果有人有任何想法或解决方案,我将非常感激。
答案 0 :(得分:1)
以下代码使用Google geometry库来计算点之间的距离。距离存储在数组中,然后进行解析以找到最小距离。
我已经将数组从dist []更改为coords [],因为我们需要一个数组来保持距离dist []。
<script type="text/javascript" src="//maps.googleapis.com/maps/api/js?libraries=geometry&sensor=false"></script>
<script type="text/javascript">
var coords = [
[35.733972, -5.881999],
[35.734077, -5.881033],
[35.736898, -5.877771],
[35.738396, -5.875154]
];
var dist = [];//Array to hold distances
function calcRoute() { {
var start = new google.maps.LatLng(35.728329, -5.882750);
for (var i = 0; i < coords.length; i++){
var point = new google.maps.LatLng(coords[i][0],coords[i][1]);
var distance = google.maps.geometry.spherical.computeDistanceBetween(start, point);
dist.push(distance);
}
var test = dist[0];
var index = 0;
for (var i = 1; i < dist.length; i++){
if(dist[i] < test){
test = dist[i];
index = i;
}
}
var end = new google.maps.LatLng(coords[index][0],coords[index][1]);
// Apply the rest of your code here
答案 1 :(得分:0)
听起来你想在DirectionsServiceRequest中使用optimizeWaypoints:true:
optimizeWaypoints |布尔值|如果设置为true,DirectionService将尝试重新排序提供的中间航点,以最大限度地降低路线的总成本。如果优化了航点,请检查响应中的DirectionsRoute.waypoint_order以确定新的排序。
返回的每个leg of each route都包含距离和持续时间信息。