The map of Rome on scale 1:10.000
The above mentioned cadastral map consists of several hundred sheets,
for the greater part drawn on scale 1:1000.
In order to maintain nearly unvaried the degree of accuracy of the ca-
dastral map when passing over to scale 1:10.000, the reducing was principally
carried out photographically.
For this purpose map sheets 1:1000 were at first reduced photographi-
cally to the intermediate scale 1:5000. The reductions thus obtained served for
compilation of the original specimen drawn on transparent paper. This was
done by tracing all details needed for the final map from the fore-said reduc-
tion to the specimen sheet. Naturally all purely cadastral details were left away,
together with those, which — being on the one hand necessary and useful on
the cadastral map 1:1000 — on the other hand could not be represented in
clear manner on scale 1:10.000.
The specimen sheets were at last reduced photographically to this
latter scale, using glass plates, which served for the preparation of the photo-
lithos for offset printing.
Therefore, besides eventual small deformations due to the reducing process
and specially to the (very small) distortion of the used lens, the newly construc-
ted map will maintain the degree of accuracy of the cadastral map from which
it is derived. It will also contain every detail. with the exception of those ne-
cessarily omitted for the reason already mentioned above.
The map on scale 1:10.000 should comprise four sheets, which — besi-
des the city itself — will cover also expansion areas, thus rendering possible the
use of the map for eventual planning purposes. Later on it will also be
easy to bring the map up-to-date, in order to follow the continuous and rapid
constructions of new buildings, streets, railway lines, etc.
Planimetric details were designed in Siena brown, while the internal
areas of public and private buildings were distinguished by different colours.
Further, use of a neutral colour was made for contour lines and height spots,
