如何取消选中KML文件中的文件夹 [英] How to uncheck folders in KML file

问题描述

我已将visibility设置为0，但一点都没有运气，当我用Google Earth加载时仍会加载所有数据.如何取消选中所有文件夹和内部项目，以便用户可以选择以后需要的内容.我正在创建KML通过C#并且我发布了大KML文件的一小部分，我正在将其转换为KMZ.以下kml代码段

i have made visibility to 0 but no luck at all,still loading all data when i load with Google Earth .How to uncheck all folders and inside items so user can select which ever required in later.i am creating KML through c# and i am posting small part of big KML file which i am converting in to KMZ.What is wrong in following kml snippet

<?xml version="1.0" encoding="utf-8"?>

<kml: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:json="http://www.w3.org/2005/Json">

  <kml:Folder>

    <kml:visibility>0</kml:visibility>

    <kml:name>Test</kml:name>

    <kml:open>1</kml:open>

    <kml:Folder>

      <kml:visibility>0</kml:visibility>

      <kml:name>2G</kml:name>

      <kml:open>1</kml:open>

      <kml:Folder>

        <kml:visibility>0</kml:visibility>

        <kml:name>Icro</kml:name>

        <kml:Folder>

          <kml:visibility>0</kml:visibility>

          <kml:name>Working</kml:name>
        </kml:Folder>
      </kml:Folder>
    </kml:Folder>
  </kml:Folder>

  <kml:Folder>

    <kml:visibility>0</kml:visibility>

    <kml:name>3G</kml:name>

    <kml:open>1</kml:open>

    <kml:Folder>

      <kml:visibility>0</kml:visibility>

      <kml:name>Testro</kml:name>

      <kml:Folder>

        <kml:visibility>0</kml:visibility>

        <kml:name>Working</kml:name>

        <Document xmlns="http://www.opengis.net/kml/2.2">

          <name>POINTS</name>
        </Document>
      </kml:Folder>
    </kml:Folder>
  </kml:Folder>
</kml:kml>

推荐答案

Google Earth中有一个功能"，与KML 2.2规范描述数据的方式与父文件夹的可见性相矛盾.

There is a "feature" in Google Earth that contradicts how the KML 2.2 spec describes data is visible by the visibility of parent folders.

OGC KML 2.2标准声明为了使某个功能可见，其所有祖先的 kml:visibility 标签也应设置为1或true".这意味着在父文件夹上的可见性为0时应使该文件夹中包含的所有子地标都不可见.

The OGC KML 2.2 Standard states "in order for a Feature to be visible, the kml:visibility tag of all its ancestors shall also be set to 1 or true". This means that having visibility=0 on a parent folder should make all child placemarks contained within the folder not visible.

但是，Google Earth实现了可见性，即使未明确定义可见性(默认可见性= 1)，子元素上的可见性也会覆盖父文件夹上的可见性，并且这违反了上述标准.据报道，这是2009年的 bug ，并描述了此处. Google对这个问题的回应如下:

However, Google Earth implements visibility such that visibility on a child element overrides visibility on parent folders even if the visibility is not explicitly defined (by default visibility=1) and this violates the standard as stated above. This was reported as a bug in 2009 and described here. Google responded to the issue as follows:

可见性始终在子元素级别被覆盖，并且 更改它会破坏现有代码"

"Visibility has always been overridden on the child element level, and changing this would break existing code"

这意味着所有不希望在启动时显示的KML地标必须明确具有可见性0，而不仅仅是在文件夹/文档"级别设置一次可见性.

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