gives: the description, the obligatory and optional fields,
the cardinality and the format.
SECTION X (definition of the sections)
Description
Constraints
Cardinalitie
s
Types
Description
of the
contents of
the elements
that make up
the metadata.
Constraints or
non
constraints of
the field
(O/M).
Cardinality
(1/N): the
presence of
one or more
types
of data.
Alphanum
erical
numerical
data.
Figure 2.1 - Example of a metadata description in the
CEN guidelines.
The nine sections are as follows:
• Data base identification
• General description
• Data base quality
• Spatial reference system
• Extension
• Data definitions
• Classification
• Data base management
• Metadata information
The guidelines foresees the definition of the data bank
item, that can be integrated with a general item and a
general data bank description.
This description must contain information on the data
bank, the scope, the use, the archiving scheme and the
spatial reference system.
The information furnished by metadata can be extensive
or synthetic; the manager can decide whether to give all
the information or only the information on where the data
can be found.
3. O.G.R.: A PRACTICAL APPLICATION
The application that is here proposed is an example of
primary metric data archiving. Together with the data
structure, a metadata structure has been set up which
completely complies with the guidelines suggested by
CEN. There are metadata that can be defined as
“obligatory” and others that are defined as “optional”.
The proposed structure can be implemented using any
software (MGE, ARCINFO, ArcView; Map Info, Atlas
Gis Geomedia/Web) and can be inserted together with
the databanks of all the other Land Information Systems
that today are used for the organisation and planning of
the land.
The decision to not use specifically planned systems for
the cataloguing of architectural goods (e.g. GART,
GUARINI; APIS) can be explained by the necessity of
limiting the costs of the intervention (Waldhausl, 1997).
The O.G.R. area is part of the industrial expansion of
Turin that took place at the end of the last century. The
new Master Plan of the City of Turin, destined part of
this area for the enlargement of the Politecnico and for
the creation of an ecological area. It has been necessary
to demolish some buildings and modify the general
layout of the area.
The Geomatics and Surveying sector has been encharged
to carry out:
a complete documentation of the O.G.R. area
an information archiving experiment
a collection of photogrammetrical and topographical
information
data availability via Internet.
The primary data relative to the photogrammetric
documentation of the objects and of the area were
collected according to the guidelines proposed at the
C.I.P.A. convention of 1993, called “3x3 guidelines”.
The preliminary work stage was that of carrying out the
stereoscopic taking of the significant façades of the
buildings.
The archiving of the data and the metadata has been
organised : a General Project and three “modules” :
• “NETWORK” MODULE: which includes, as data,
the sketch and co-ordinates of the geodetical and
control points in several reference systems (local
system, national cartographic system) and, as
metadata, the information on the methods,
procedures and instruments used for the survey and
adjustment of the networks.
• “BUILDING” MODULE: which includes, as data,
the identification of the building and the link to
vector drawings, orthophotos and 3D modelling of
the objects. As metadata, compilation and
availability of the data, instruments and software,
interchange formats.
GENERAL PROJECT
DATA METADATA
General planimetry of the
area in 1:500 scale
Id of the buildings
Name of the databank
owner
reference
Figure 3.1 - Data and metadata of a general project
