[Geojson] FW: Features without geometry

[Jason Birch]

Andrew wrote: 
> According to the 'spec':
> "Elements Specific to Placemark
>     * 0 or one <Geometry> elements"
>
http://code.google.com/apis/kml/documentation/kml_tags_21.html#placemark

And in the KML schema if I'm reading it correctly:

http://code.google.com/apis/kml/schema/kml22beta.xsd

<complexType name="PlacemarkType" final="#all">
 <complexContent>
  <extension base="kml:FeatureType">
   <sequence>
    <element ref="kml:Geometry" minOccurs="0" /> 
   </sequence>
  </extension>
 </complexContent>
</complexType>

On an experiential level, I've created several KML sections that contain
no geometry (only Camera element) in their Placemarks without causing
Google Earth to complain about parsing errors.  I only did this after
someone else suggested it last month; up until then I thought that
geometry was required.

Jason