Google Maps API V3：KML 图层未显示？

Question

我有一个 KML 文件，我将它复制/粘贴在一起形成一个 fusiontable，如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.1">
<Document>
<Polygon><outerBoundaryIs><LinearRing><coordinates>-73.992177,40.743465,0.0 -74.008242,40.752352,0.0 -74.006533,40.756112,0.0 -73.983973,40.748934,0.0 -73.987733,40.744149,0.0 -73.992177,40.743465,0.0</coordinates></LinearRing></outerBoundaryIs></Polygon>
<Polygon><outerBoundaryIs><LinearRing><coordinates>-73.973035,40.689458,0.0 -73.989784,40.683305,0.0 -74.008242,40.686381,0.0 -73.978846,40.705181,0.0 -73.977479,40.698003,0.0 -73.973035,40.689458,0.0</coordinates></LinearRing></outerBoundaryIs></Polygon>
(...)
</Document>
</kml>

据我所知，在地图上绘制这些就像

一样简单

var zipoverlay = new google.maps.KmlLayer('zips.kml');
zipoverlay.setMap(map);

但显然这无济于事。是不是没有我想象的那么神奇？

谢谢！

Answer 1

感谢 Dr.Molle，我们解决了这个问题。这是我做错的：

1. 需要从我自己的计算机外部访问 KML 文件。将其托管在其他地方以便地图能够抓取它
2. KML 文件的结构需要是这样的：

`

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://earth.google.com/kml/2.2">
<Document>
<Placemark>
<Polygon><outerBoundaryIs><LinearRing><coordinates>-73.992177,40.743465,0.0 -74.008242,40.752352,0.0 -74.006533,40.756112,0.0 -73.983973,40.748934,0.0 -73.987733,40.744149,0.0 -73.992177,40.743465,0.0</coordinates></LinearRing></outerBoundaryIs></Polygon></Placemark>
<Placemark><Polygon><outerBoundaryIs><LinearRing><coordinates>-73.973035,40.689458,0.0 -73.989784,40.683305,0.0 -74.008242,40.686381,0.0 -73.978846,40.705181,0.0 -73.977479,40.698003,0.0 -73.973035,40.689458,0.0</coordinates></LinearRing></outerBoundaryIs></Polygon>
</Placemark>
</Document></kml>

Answer 2

<Polygon/> 必须是 <Placemark/> 或 <MultiGeometry/> 的孩子，但不能是 <Document/> 的孩子

Answer 3

我的错误是在我的服务器上启用了 HTTP 身份验证，这阻止了 google 请求 KML 文件。我猜它不是在客户端完成的。

Answer 4

我遇到了这种问题（kml 层不显示），因为 url（或者可能只是文件名）太长了。 使用较短的网址，它可以正常工作。