In fact, even though a city prior to the Edo period would have been designed to match the Shijin-so-o topography, it is very unlikely that the Four Gods were Mountain, River, Road and Lake.
つまり、江戸時代以前の都市デザインが四神相応となるように設計されていても、その四神が山川道澤であるとは考えにくい。