In answer to this I have made a series of short videos covering all aspects of the tabletop dressing that I currently use.
Starting off with just getting the tabletop surface.
In this case an old chalkboard that is 4 feet by 6 feet.
Next the 'hills' are placed and taped onto the table surface.
The geo-hex is 30 cm across flats (close to 1 foot).
Then the cloth drapery is place over the surface.
Then the 'greenery' and water features are laid out and brought to life.
Finally the urban environment is completed.
My thanks to Jim and Jeff for the inspiring questions and suggestions to do video of my processes.