Geography Reference
In-Depth Information
i.
explicit length measurements, which are clearly written as numbers of ancient Venice
paces (1 Venice pace = 1.738674 m, as stated in Martini, 1883), e.g. in the area of the
Pertegado
ditch, whose name properly means “measured”;
ii.
implicit length measurements, e.g. along the riverside where the points are graphically
located in order to define the width and the geometry of the riverbanks;
iii.
local bathymetric surveys and some selected riverbed transects, in particular at the river
mouth of the
Tramontana
branch.
In the latter case, the mapmaker clearly highlighted which topographic reaches are the best
surveyed, by means of red lines drawn onto the map. In those reaches pickets were certainly
located and their related distances measured. According to that, each of these points had to
be further sighted from a standpoint lying on the opposite riverside.
Therefore, this class of evidences states the fundamental technical character of the maps as a
whole or for some selected subareas.
Figure 7.
Topographic measurements in L map.
