title: Orthographic projections in Google Earth (/Sky) possible? Alternatives?
body: <p>I need to create whole-sky maps, but Google Earth in Sky mode has limited "zoom out." Is it possible to create an orthographic map projection with Google Earth (or, for that matter, MS Virtual Earth)? Really any of the standard projections will do, although it would be nice to have options. </p>
  
  <p>Of course, I could render the projection statically and then paint my KML layer on top of it, but the ideal use-case would allow the user to add additional KML layers, zoom in and out, etc. </p>