Agreed. Whenever he is describing the terrain somewhere it is either fairly generic or specifically a parody. Hence the plains around Ankh Morpork where all the

Agreed. Whenever he is describing the terrain somewhere it is either fairly generic or specifically a parody. Hence the plains around Ankh Morpork where all the farms grow brassicas and nothing else. Cabbages, broccoli, turnips, mustard, collard greens, and so on for hundreds of miles around.