Just for interest/fun, a few maps, or images of maps.
Each of these 3 maps shows how there was an estuary at
Despite it's date, 1908, it is fairly representative of St. Florence in the early 1950's.
In order to bring this map up-to-date (that is to say to the 1970's) we must add in:
This is based on the previous map, which has information that is not strictly need, so it has been modified.
A few superflous features have been removed e.g. contour lines, some trees, some field boundaries,..
Then, in order to make it a bit more legible (?)