=== KML Layers ===
2 methods:
 * Live feed
 * File upload

Cache feeds so that if Internet goes down they remain available.

Styling/Features example:
 * http://crschmidt.net/mapping/kml

Need to handle network links.

Need to unzip KMZ files, which requires intercepting the uploaded file before just saving to the DB: http://groups.google.com/group/web2py/browse_thread/thread/63809c06cac3b0d5

Need to catch a folder full of Network Links inside the Network Link!

!OpenLayers doesn't yet support !GroundOverlay & !ScreenOverlay:
 * http://trac.openlayers.org/ticket/1567

NB This is separate to the KML [wiki:BluePrintGISImportExport Import/Export]

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[wiki:BluePrintGeographicInformationSystems GIS BluePrints]