为什么 Google 地球会更改 KML 多边形坐标？

Question

我的目标是能够使用 KML 文件在 google earth 中的定义区域上绘制阴影多边形。我创建了一个包含一个地标和一个具有所需坐标的多边形的 KML 文档，并且能够将文件导入 Google 我的地图并显示该多边形。但是，当我用 google earth 打开同一个文件时，坐标似乎被不同地解析并且多边形不正确（见图）。我的 KML 文件中是否遗漏了导致 google earth 执行此操作的某些内容？

这些是原始文件坐标。

<coordinates>
    149.02126, -36.489864, 100
    149.3816, -36.31477, 100
    149.25783, -36.134285, 100
    148.9647, -36.4074, 100
    149.02126, -36.489864, 100
</coordinates>

如果我从 google earth 复制多边形并将其作为 KML 粘贴到文本文件中，我会得到以下坐标

<coordinates>
    149.02126,-36.489864,100 
    149.3816,0,0 
    -36.31477,100,0 
    149.25783,-36.134285,100 
    148.9647,-36.4074,100 
    149.02126,-36.489864,100 
</coordinates>

完整的原始 KML 文件：

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2">
   <Document>
      <Style id="examplePolyStyle">
         <PolyStyle>
            <color>7f0000ff</color>
            <colorMode>random</colorMode>
            <fill>1</fill>
            <outline>1</outline>
         </PolyStyle>
      </Style>
      <Placemark>
         <name>ID: AU201502070705001Issued: 2015-02-07T07:53:00.000Z</name>
         <description>Begins: 2015-02-07T07:53:00.000ZEnds: 2015-02-07T08:38:00.000Z</description>
         <styleUrl>#examplePolyStyle</styleUrl>
         <Polygon>
            <outerBoundaryIs>
               <LinearRing>
                  <coordinates>149.02126, -36.489864, 100 149.3816, -36.31477, 100 149.25783, -36.134285, 100 148.9647, -36.4074, 100 149.02126, -36.489864, 100</coordinates>
               </LinearRing>
            </outerBoundaryIs>
         </Polygon>
      </Placemark>
   </Document>
</kml>

从 Google 地球

复制的完整 KML 文件

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.google.com/kml/ext/2.2" xmlns:kml="http://www.opengis.net/kml/2.2" xmlns:atom="http://www.w3.org/2005/Atom">
<Document>
    <name>Latest_Single_noCommaNoSpaces.kml</name>
    <Style id="examplePolyStyle">
        <PolyStyle>
            <color>7f0000ff</color>
            <colorMode>random</colorMode>
        </PolyStyle>
    </Style>
    <Placemark>
        <name>ID: AU201502070705001Issued: 2015-02-07T07:53:00.000Z</name>
        <description>Begins: 2015-02-07T07:53:00.000ZEnds: 2015-02-07T08:38:00.000Z</description>
        <styleUrl>#examplePolyStyle</styleUrl>
        <gx:balloonVisibility>1</gx:balloonVisibility>
        <Polygon>
            <outerBoundaryIs>
                <LinearRing>
<coordinates>
    149.02126,-36.489864,100 
    149.3816,0,0 
    -36.31477,100,0 
    149.25783,-36.134285,100 
    148.9647,-36.4074,100 
    149.02126,-36.489864,100 
</coordinates>
                </LinearRing>
            </outerBoundaryIs>
        </Polygon>
    </Placemark>
</Document>
</kml>

Answer 1

您的原始 KML 坐标在元组中有空格，that is not valid（空格分隔个元组）。

来自the documentation：

<coordinates>(required)
Four or more tuples, each consisting of floating point values for longitude, latitude, and altitude. The altitude component is optional. Do not include spaces within a tuple. The last coordinate must be the same as the first coordinate. Coordinates are expressed in decimal degrees only.

<coordinates>149.02126, -36.489864, 100 149.3816, -36.31477, 100 149.25783, -36.134285, 100 148.9647, -36.4074, 100 149.02126, -36.489864, 100</coordinates>

应该是：

<coordinates>149.02126,-36.489864,100 149.3816,-36.31477,100 149.25783,-36.134285,100 148.9647,-36.4074,100 149.02126,-36.489864,100</coordinates>

为什么 Google 地球会更改 KML 多边形坐标？

Why is Google Earth changing KML polygon coordinates?

xml

google-maps

google-maps-api-3

kml

google-earth