kml, High Performance KML for Maps and Earth, not working -


i made kml file mimic example " high performance kml maps , earth'-on youtube-link (at 15:11-16:05 or 15:51)

this presentation on friday, on rush work, thanks.

i error: validation stopped @ line 2, column 45: no decleration found element 'kml'

when try run code googl earth crashes.

here code:

<?xml  version="1.0" encoding="utf-8"?> <kml xmlns="http://www.opengis.net/kml/2.2"> <placemark> <gx:track>  <when>13:51</when>   <gx:coord>-147.871 64.861</gx:coord>     <extendeddata>      <schemadata  schemaurl="#schema">        <gx:simplearraydata  name="pm 2.5">             <gx:value>0.0</gx:value>             <gx:value>-6.0511e+15</gx:value>             <gx:value>180</gx:value>         </gx:simplearraydata>      </schemadata>     </extendeddata> </gx:track> </placemark> <placemark>  <gx:track>   <when>13:56</when>    <gx:coord>-147.871 64.861</gx:coord>     <extendeddata>      <schemadata  schemaurl="#schema">        <gx:simplearraydata  name="pm 2.5">             <gx:value>0.0</gx:value>             <gx:value>-1.0001e+16</gx:value>             <gx:value>180</gx:value>         </gx:simplearraydata>      </schemadata>     </extendeddata>    </gx:track> </placemark> </kml>

this shorter version of actual full kml file

you not using correct format kml file

firstly, while correct cases

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

i prefer use (i forget why do)

<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">

but main problem missing <document>

so actual file should this

<?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>name</name> <placemark> ... </placemark> </document> </kml>

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