關於kml 製作地標、地面疊加層、路徑、多邊形

話不多說，直接擼代碼。。。

首先是地標

地標

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"> <Placemark>
 <name>Simple placemark</name>
 <description>Attached to the ground. Intelligently places itself at the height of the underlying terrain.</description>
 <Point>
 <coordinates>-122.0822035425683,37.42228990140251,0</coordinates>
 </Point>
 </Placemark> </kml>

結構分析：

• XML 標頭。這是每個 KML 文件的第1行。該行前面不能有空格或其他字符。
• KML 命名空間聲明。這是每個KML 2.2文件的第2行。
• 包含以下元素的地標對象：
  • 用作地標標籤的名稱
  • 附着到地標的“提示框”中顯示的說明
  • 指定地標在地球表面的位置的點 - 經度、緯度和高度（可選）

地面疊加層 

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"> <Folder>
 <name>Ground Overlays</name>
 <description>Examples of ground overlays</description>
 <GroundOverlay>
 <name>Large-scale overlay on terrain</name>
 <description>Overlay shows Mount Etna erupting on July 13th, 2001.</description>
 <Icon>
 <href>http://developers.google.com/kml/documentation/images/etna.jpg</href>
 </Icon>
 <LatLonBox>
 <north>37.91904192681665</north>
 <south>37.46543388598137</south>
 <east>15.35832653742206</east>
 <west>14.60128369746704</west>
 <rotation>-0.1556640799496235</rotation>
 </LatLonBox>
 </GroundOverlay>
 </Folder> </kml> 

路徑

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"> <Document>
 <name>Paths</name>
 <description>Examples of paths. Note that the tessellate tag is by default
 set to 0. If you want to create tessellated lines, they must be authored
 (or edited) directly in KML.</description> <Style id="yellowLineGreenPoly">
 <LineStyle>
 <color>7f00ffff</color>
 <width>4</width>
 </LineStyle>
 <PolyStyle>
 <color>7f00ff00</color>
 </PolyStyle>
 </Style> <Placemark>
 <name>Absolute Extruded</name>
 <description>Transparent green wall with yellow outlines</description>
 <styleUrl>#yellowLineGreenPoly</styleUrl>
 <LineString>
 <extrude>1</extrude>
 <tessellate>1</tessellate>
 <altitudeMode>absolute</altitudeMode>
 <coordinates> -112.2550785337791,36.07954952145647,2357
 -112.2549277039738,36.08117083492122,2357
 -112.2552505069063,36.08260761307279,2357
 -112.2564540158376,36.08395660588506,2357
 -112.2580238976449,36.08511401044813,2357
 -112.2595218489022,36.08584355239394,2357
 -112.2608216347552,36.08612634548589,2357
 -112.262073428656,36.08626019085147,2357
 -112.2633204928495,36.08621519860091,2357
 -112.2644963846444,36.08627897945274,2357
 -112.2656969554589,36.08649599090644,2357 </coordinates>
 </LineString> </Placemark>
 </Document> </kml>

請注意，該代碼生成的其實只是高於地面的一條折線。<tessellate> 標籤將該折線切成小段，而 <extrude> 標籤將其向下延伸到地面。

多邊形

<?xml version="1.0" encoding="UTF-8"?>
<kml xmlns="http://www.opengis.net/kml/2.2"> <Placemark>
 <name>The Pentagon</name>
 <Polygon>
 <extrude>1</extrude>
 <altitudeMode>relativeToGround</altitudeMode>
 <outerBoundaryIs>
 <LinearRing>
 <coordinates>
 -77.05788457660967,38.87253259892824,100 
 -77.05465973756702,38.87291016281703,100 
 -77.05315536854791,38.87053267794386,100 
 -77.05552622493516,38.868757801256,100 
 -77.05844056290393,38.86996206506943,100 
 -77.05788457660967,38.87253259892824,100
 </coordinates>
 </LinearRing>
 </outerBoundaryIs>
 <innerBoundaryIs>
 <LinearRing>
 <coordinates>
 -77.05668055019126,38.87154239798456,100 
 -77.05542625960818,38.87167890344077,100 
 -77.05485125901024,38.87076535397792,100 
 -77.05577677433152,38.87008686581446,100 
 -77.05691162017543,38.87054446963351,100 
 -77.05668055019126,38.87154239798456,100
 </coordinates>
 </LinearRing>
 </innerBoundaryIs>
 </Polygon>
 </Placemark> </kml> 

五角大樓的示例是通過繪製簡單的內外殼，然後將它們向下凸出到地面生成的

以上的都沒有什麼難度，直接複製就行。。。