The palette
The weave is the subject, so let it stay quiet: a warm grey, close to sand, holds better than a cold one over this much surface. Keep your strongest ink for the freeways, which are the only lines with enough weight to organise the sheet. Green here means two different things: the dry green of the mountains, which is wild, and the rare flat green of the parks below. A map has one ink for both, and the drawing paints them alike, so choose the dry green of the mountains, which covers the most ground: the parks below will take it too. The sea enters only at the south-west corner, and the harbour basins at the bottom will take a geometric treatment.