Look beyond arbitrary administrative divisions at what actually exists on the ground. Of course, many cities are spirals rather than circles so it can be diffic

Look beyond arbitrary administrative divisions at what actually exists on the ground. Of course, many cities are spirals rather than circles so it can be difficult decide where to draw the line. Oakland and Silicon Valley, and even San Jose are also part of "Greater San Francisco", which is a very spread out city because of the geographical imposition of the bay.