Place series of 1/2 inch :: 1x1ft special slab footings on soft or hard ground 4 feet apart. They act as ground support.
Lay 4x4ft deck sub-frames on top of slab footings and interlock sub-frames with auto gravity-lock feature.
Micro-adjust individual 4x4ft deck sub-frame leg elevations using twisting motions to establish 100% flat deck.
Fasten top deck panels with simple tools and your deck is complete. Create rectangle, L-shaped decks, etc.