我正在研究一个通过在 kml 中的特定位置添加 gps 坐标来修改 kml 文件的项目。但是,我的代码在最后保存时在所有元素上添加了“gx”命名空间。我研究并查看了大量不同的 Visual Basic XML 编写方法,但我已经没有想法了。如何停止添加不必要的命名空间?!
测试.kml:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.opengis.net/kml/2.2">
<Document>
<name>test.kml</name>
<Snippet>File Created Mon Jul 9 15:50:16 2012</Snippet>
<Style id="multiTrack_n">
<IconStyle>
<Icon>
<href>http://maps.google.com/mapfiles/kml/shapes/track.png</href>
</Icon>
</IconStyle>
<LineStyle>
<color>99ffac59</color>
<width>6</width>
</LineStyle>
</Style>
<Folder>
<Placemark>
<name>test.kml</name>
<styleUrl>#multiTrack_n</styleUrl>
<gx:Track>
<!--GPS Tracking data Points-->
</gx:Track>
</Placemark>
</Folder>
</Document>
</kml>
代码:
Imports System.IO
Imports System.Xml
Imports System.DateTime
Imports <xmlns="http://www.opengis.net/kml/2.2">
Imports <xmlns:gx="http://www.opengis.net/kml/2.2">
...
Public Sub addCoordinate(ByVal lon As Double, ByVal lat As Double, ByVal att As Double, ByVal timeStamp As String)
Dim currentDoc = XDocument.Load("test.kml")
Try
whenElement = _
<when><%= timeStamp %></when>
coordElement = _
<gx:coord><%= lon.ToString %>,<%= lat.ToString %>,<%= att.ToString %></gx:coord>
Dim testLocation = currentDoc.<kml>.<Document>.<Folder>.<Placemark>.Elements.Last()
testLocation.Add(whenElement)
testlocation.Add(coordElement)
currentDoc.Save("test.kml")
Catch ex As Exception
Console.WriteLine(ex)
End Try
End Sub
代码后:
<?xml version="1.0" encoding="utf-8" standalone="yes"?>
<gx:kml xmlns="http://www.opengis.net/kml/2.2" xmlns:gx="http://www.opengis.net/kml/2.2">
<gx:Document>
<gx:name>test.kml</gx:name>
<gx:Snippet>File Created Mon Jul 9 16:40:11 2012</gx:Snippet>
<gx:Style id="multiTrack_n">
<gx:IconStyle>
<gx:Icon>
<gx:href>http://maps.google.com/mapfiles/kml/shapes/track.png</gx:href>
</gx:Icon>
</gx:IconStyle>
<gx:LineStyle>
<gx:color>99ffac59</gx:color>
<gx:width>6</gx:width>
</gx:LineStyle>
</gx:Style>
<gx:Folder>
<gx:name>test.kml</gx:name>
<gx:Placemark>
<gx:name>test</gx:name>
<gx:styleUrl>#multiTrack_n</gx:styleUrl>
<gx:Track>
<!--GPS Tracking data Points-->
<when xmlns="http://www.opengis.net/kml/2.2">2012-07-09T08:40:29Z</when>
<gx:coord xmlns:gx="http://www.opengis.net/kml/2.2">0,0,0</gx:coord>
<when xmlns="http://www.opengis.net/kml/2.2">2012-07-09T08:40:33Z</when>
<gx:coord xmlns:gx="http://www.opengis.net/kml/2.2">0,0,0</gx:coord>
<when xmlns="http://www.opengis.net/kml/2.2">2012-07-09T08:40:41Z</when>
<gx:coord xmlns:gx="http://www.opengis.net/kml/2.2">0,0,0</gx:coord>
</gx:Track>
</gx:Placemark>
</gx:Folder>
</gx:Document>
</gx:kml>