在Google Maps v3中绘制超过8个路标

问题描述

将代码从Javascript API 2迁移到3.我有一个位置列表，我需要以驾驶路线的形式进行绘制。这是在v2中使用以下代码完成的：

  directions = new GDirections（map）; 
 directions.loadFromWaypoints（waypoints，{preserveViewport：true}）; 
  

以下是我将它转换为V3的尝试

  var request = {
 origin：startLoc，
 destination：endLoc，
航点：航点，
 optimizeWaypoints：true，
 travelMode：google.maps.TravelMode.DRIVING 
}; 
 
 directionsService.route（request，function（response，status）{
 if（status == google.maps.DirectionsStatus.OK）{
 directionsDisplay.setDirections（response）; 
} 
}）; 
  

不是整个代码，而是一般想法。似乎工作正常，只有一个小问题。当有超过8个航点时，呼叫失败。这是自声明以来的预期结果

由于我没有在第2版中遇到这个问题，这是一个新的限制吗？ V3？我想知道我是否在使用那些没有为我需要的东西而设计的东西。这是一个非常少用的应用程序与2个用户，所以我不知道如果昂贵的营业执照是值得的回报。 Google地图团队的电子邮件尚未返回。任何解决方法/指针都会有很大的帮助。感谢。

解决方案

一个可能的解决方法是使用多个DirectionsService请求。

Migrating code from Javascript API 2 to 3. I have a list of locations which i need to plot in the form of a driving directions. This was done in v2 using the following code

directions = new GDirections(map);
directions.loadFromWaypoints(waypoints, {preserveViewport: true});  

Here is my attempt at converting this to V3

var request = {
    origin: startLoc,
    destination: endLoc,
    waypoints: waypoints,
    optimizeWaypoints: true,
    travelMode: google.maps.TravelMode.DRIVING
};          

directionsService.route(request, function(response, status) {
    if (status == google.maps.DirectionsStatus.OK) {
        directionsDisplay.setDirections(response);
    } 
});

Not the whole code, but the general idea. Seems to work fine, with one little issue. When there are more than 8 waypoints, the call fails. This is expected since Google Maps API v3 Docs states

Since i didn't run in to this issue in v2, is this a new restriction with v3? I wonder if i am using something that was not designed for what i need. This is a very lightly used applicaton with 2 users, so i am not sure if an expensive business license is worth the return. Emails to Google maps team have not yet been returned. Any workarounds/pointers will be of great help. Thanks.

解决方案

One possible work around (particularly for a lightly used site) is to use multiple DirectionsService requests.

• example 1 (addresses)
• example 2 (coordinates)

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