I don't mean to infer that this map depicts an oriental city (though the names Shikodu / Zigoto have a distinct Japanese flavor to them), but larger cities in feudal Japan, Korea, China, and SE Asia feature very square or rectangular city layouts with grids of canals and streets defining the geometry, unlike any city in the west (Rome included). While towns and villages tend to follow the geography of the terrain, urban planning in the orient defies the geology with determined geometry. It depends in what part of the world and when, as to how the city layout reflects reality or not.