White blocks represent the buildings and enclosures. Green represents the foliage, grass and other parts of the zoo. Grey represents usable walkways and pathways. The whole map has been simplified but not to the extent where information is lost.
The signage for the animals/toilets will jut out from the wall, the sides will also bear the symbol so they can be viewed from all angles easily. The location they are in will also be displayed so that they know what part of the map they are in.