KmlGroundOverlay
data class KmlGroundOverlay(val name: String?, val href: String, val north: Double, val south: Double, val east: Double, val west: Double, val rotationDegrees: Double = 0.0)(source)
A KML <GroundOverlay>: an image draped over a <LatLonBox>.
rotationDegrees is the box's optional <rotation> — degrees counter-clockwise about the box centre, per the KML reference. href is untouched: a KMZ-packed relative path, an absolute URL, or (as the Site Planner exports) a sibling file name that nothing can fetch — what is reachable is the importer's judgement, not the parser's.