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International cooperation and technology transfer
Mussio, Luigi

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ited in editing
center of each span.
subject of the study does not allow an interpretative
approach based upon rigid geometrical schemes, but
imposes the setting up of the surveying procedures and
their graphic elaboration in a wider research process, that
is still going on, and of which the first results are being
exhibited herein.
Having known the evolving character of the knowledge
makes the numeric survay an extremely diversified
instrument for editing of the dynamic interpretative models
that are using an hermeneutical work in progress. It results
the inability and uselessness of an objective and complete
surveying, while it is necessary an act of conscientious
and complex evaluation, that is not reduced to a definition
of the measurements, but that is being finalized having
total knowledge of the object to be explored, deciding on
the information that are to be obtained by means of
A particular subject of survey, even though being an
expression of a Kunstwollen directed to a search of self
rationality in the geometries of celestial Jerusalem, cannot
be read and studied applying a stereotypes that locate
symmetries, orders, hierarchies, classifications,
repetitions and series.
New possibilities during the course of the survey and new
questions have been brought up to light using the ever
increasing scientific and technological innovations in the
field of surveying, imaging and database management.
Interdisciplinary character of the acknowledgement process
has, therefore, oriented the data acquisition procedures
and, in order to comply with the requirements of the Ministry,
the study has been focused on the longitudinal section,
along the nave and on the transversal section, along the
The measurement project has been finalized in the
required forms, exploiting the internal space of the church
and prearranging eventual consecutive modifications. The
geometry of the basilical structure is one of a Latin cross,
with three naves. A need to measure a position of a vault
system has suggested a use of topographical instruments
that could be able to determine a distance between a vertex
of the measuring station and a collimation point without a
help of a reflecting prism, exploiting natural reflecting
features of the materials.
In the process of measurement, the elements deriving
from have enabled a location of the points and the lines in
the space. The approximation grade is linked with
significance and a quality of the selected points.
Being cleared, in that way, of the requirements to signal
the points to be located, it became possible to concentrate
on the selection of the same. This preliminary
consideration on the instruments and the objectives of the
study has affected the design of the traverse shape of
which the topological structure has been evidently
completed upon reaching the planned results, (fig.2)
Having set an alignment passing through the middle of
the central nave spans, parallel to the longitudinal section,
a particular traverse has been made with 14 vertices of the
measuring station out of which 9 have been positioned in
the center of each single span of the central nave, 3 in the
center of the transept span and 2 externally (one in front of
the facade - in order to proceed with measurement of the
main portal - and one in the cloister for eventual subsequent
linkage into an external traverse chain).
In order to make reliable the measurements relating to the
traverse, collimations have been made from each vertex to
all other points within a visible range; even though that
procedure is not offering an extremely precise the network
structure of the design, permits a control of the
measurements achieved. Calculation has been made
using commercial software.
Then the problem of measuring is moved to the selection
of criteria for the survey of details. Very often, a design
attenuates or accentuates the geometry leading to
formulation of the erroneous interpretations: non-respected
alignments, forced or non-measured symmetries.
The curve of the circular arch could be obtained by
dismantling the form in the measurement stage by
determining three points, but the procedure brings up the
risks as it would not demonstrate possible deformations
impressed into the theoretical curve.
The advantage, obtained until recently only by
photogrammetrical methods (where it is possible to apply
such methods), consisted, in fact, in a possibility to calculate
equation of the curve using a number of points that could