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<blockquote data-quote="aramis erak" data-source="post: 7973554" data-attributes="member: 6779310">One big consideration about flat worlds: Visibility.The vision limit varies by weather, but the maximum is really about 250 to 300 km for any useful information, with a peak acuity of about 0° 0' 28&quot;....&nbsp; or a width of 0.000135748×Distance per &quot;pixel&quot;... So, at 1 km, that peak sensitivity &quot;pixel&quot; is roughly 0.14m; At 5km, it's roughly 0.6m, which reduces a man to about 1x3 pixels, with a separation of two men in ranks basically being about the same.A 20m tower is limited almost exclusively by the vision. It won't see individuals. It will see units at about twice as far as on earth, if not further.On earth, the 30m is diminishing returns... not so much on a flat world.Large troop movements can be seen from tall towers... and taking a trebuchet, but making the cup a swinging bucket for a man, and 20m trees, you can easily get a man 30m up....you can even put that on a stone&nbsp; tower or earthen motte 10m high, to get 40-60m up. On earth, the curve makes that less useful, but on flat world.... spot the neighbor's army at 50km...</blockquote>

[QUOTE="aramis erak, post: 7973554, member: 6779310"] One big consideration about flat worlds: Visibility. The vision limit varies by weather, but the maximum is really about 250 to 300 km for any useful information, with a peak acuity of about 0° 0' 28".... or a width of 0.000135748×Distance per "pixel"... So, at 1 km, that peak sensitivity "pixel" is roughly 0.14m; At 5km, it's roughly 0.6m, which reduces a man to about 1x3 pixels, with a separation of two men in ranks basically being about the same. A 20m tower is limited almost exclusively by the vision. It won't see individuals. It will see units at about twice as far as on earth, if not further. On earth, the 30m is diminishing returns... not so much on a flat world. Large troop movements can be seen from tall towers... and taking a trebuchet, but making the cup a swinging bucket for a man, and 20m trees, you can easily get a man 30m up.... you can even put that on a stone tower or earthen motte 10m high, to get 40-60m up. On earth, the curve makes that less useful, but on flat world.... spot the neighbor's army at 50km... [/QUOTE]

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