Insert PinPoints under DEM Earth.
Anything under a PinPoint will lock to the DEM Earth surface when you move and scale.
Copy, simply puts the pinpoint coordinates in the clipboard.
Paste tries to read a coordinated from the clipboard.
You can set a height value. this is an offset from the computed surface height.
Once things are locked in, the set button is automatically enables to lock in the internal scale factors.
PinPoint 2 extends the original Pinpoint, to include a default polygon. this can be used with i.e the matrix object or cloner to place things on a pin, even if there is nothing under it.