WHEN EXPLORATION BECOMES SETTLEMENT

Once the problem is visible, the temptation is to start drawing lines.

That would be backwards.

Before choosing a grid, we need to know what kind of Mars it is being designed for, what jobs a common geography would need to perform, and which properties matter when the possible answers begin to trade against one another.

Part II therefore builds the design from the requirements upward:

Scenario — what kind of early Martian civilisation are we designing for?
Jobs — what must geography allow that civilisation to do?
Brief — what requirements follow?
Baseline — do existing systems already satisfy them?
Coverage — what should be common across the planet?
Scale — at what levels should places be organised?
Geometry — how should a round planet be divided?

The Baseline Check matters particularly.

There is no failed Martian geography waiting to be repaired. Coordinates and nomenclature already do their jobs extremely well.

Only if something useful remains missing do we earn the right to add another layer.