Google Maps API V3：KML图层未显示？

Question

我有一个KML文件，可以将其复制/粘贴在一起以形成一个融合表，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>

据我了解，将它们绘制在地图上就像

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

但这显然无济于事。 它不像我想的那样神奇吗？

谢谢！

Answer 1

多亏了Molle博士，我们才得以解决。 这是我做错的事情：

1. 需要从我自己的计算机外部访问KML文件。 将其托管在其他位置，以便地图能够抓取它
2. KML文件的结构应如下所示：

`

<?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/> ，但不能是<Document/>

Answer 3

我的错误是在服务器上启用了HTTP身份验证，这阻止了Google请求KML文件。 我猜它还没有做客户端。

Answer 4

我遇到了此类问题（kml层未显示），因为网址（或可能只是文件名）太长。 使用较短的网址可以正常工作。