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===Water depth===
Depth of water is a big factor as dirt "flows" when a slope get gets to 40 (4 meters), meaning that dirt will slide down the slope until it gets to a lesser slope.
How to tell what a slope is.. Well examine the Tile border, but dirt will also flow if the diagonal of the tile is over 4 meter slope as well.
U---V---X---Y---Y
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So if this area was flat and you dropped 40 dirt on corner M, it would just pile up, but if you now dropped 9 more there then it would raise corners G,H,I,L,N,Q,R,S and M up by one dirt. So to get corner M 80 dirt higher that than it started , you need to get corners G,H,I,L,N,Q,R,S up 40 dirt each, so you would have had to drop 400 dirt.
So to raise corner M up 120 dirt, then you need to get all corners 40 up, + 40 more for the middle ones + 40 for M = 25 * 40 + 9 * 40 + 40 = 1400 dirt (35 cart loads).
So for the Vires land bridge, the depth was, on average, 70 dirt (less than 2 cartloads), and the bridge was/is 30 tiles long.
Next decide if you want to do a one tile or two tile wide land bridge, a . A one tile wide land bridge will be affected by dirt flow, where as a two tile one is not (if done correctly).
So for the Vires land bridge...
Overall... 210 * 30 / 40 = 158 cartloads
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So looking at that, a 2 tile wide land bridge would take a fraction more than a one tile wide one up to an average depth of 70 dirt. So if the deepest part is over 100 deep, then i I would recommend a 2 tile wide one.
The decision for the Vires land bridge was for a 2 tile wide one as it looks a lot better than a single tile (also some tiles were a lot deeper than 70).
So where is the secret? Very simple, first you raise tile 1, then with flattening help you move dirt to tile 2 and then to tile 3.
This way of land bridge building is good when you don't have enough place space to build a 2 tiles wide bridge or you don't want to spend the rest of your wurm Wurm life by digging dirt for a 2 tiles wide bridge.
<li>Double width</li>
