解析java中的kml

Question

如何確定多邊形中某點的緯度和經度？

<Polygon> 
<extrude>0</extrude> 
<tessellate>1</tessellate> 
<altitudeMode>clampToGround</altitudeMode> 
<outerBoundaryIs> 
<LinearRing> 
<coordinates>-88.346745,30.390702,0.0 -88.346823,30.389936,0.0 -88.345543,30.389914,0.0 -88.344316,30.389981,0.0 -88.342645,30.390004,0.0 -88.340765,30.390161,0.0 -88.335731,30.388969,0.0 -88.33412,30.388741,0.0 -88.33289,30.389146,0.0 -88.333095,30.389878,0.0 -88.335702,30.389727,0.0 -88.340504,30.391513,0.0 -88.341235,30.391738,0.0 -88.342384,30.391468,0.0 -88.343507,30.391445,0.0 -88.345047,30.3914,0.0 -88.346745,30.390702,0.0</coordinates> 
</LinearRing> 
</outerBoundaryIs> 
</Polygon>` 

Answer 1

使用KML（JAK）的Java API，您可以解析KML文件，然後提取其座標。

下面是從KML文件中提取座標的Java代碼片段。

JAXBContext jc = JAXBContext.newInstance(Kml.class); 

// create KML reader to parse arbitrary KML into Java Object structure 
Unmarshaller u = jc.createUnmarshaller(); 
Kml kml = (Kml) u.unmarshal(new File("test.kml")); 

Placemark placemark = (Placemark) kml.getFeature(); 
Polygon geom = (Polygon) placemark.getGeometry(); 
LinearRing linearRing = geom.getOuterBoundaryIs().getLinearRing(); 
List<Coordinate> coordinates = linearRing.getCoordinates(); 
for (Coordinate coordinate : coordinates) { 
    System.out.println(coordinate.getLongitude()); 
    System.out.println(coordinate.getLatitude()); 
    System.out.println(coordinate.getAltitude()); 
}