CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
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work. After completing the sketches surveyors and architects
measure the objects together and at the end of a day of field
work all detailed measurements are downloaded into the
computer and processed in a CAD environment. Instead of
preparing the sketches, preliminary drawings and maps on
paper, another method using digital cameras and PDA or
tabletPC or notebooks can be used in the field as they operate
in a real time environment. The photographs of desired
objects can be taken by digital camera, or the digital drawing
of the surveyed area can be obtained and directly
downloaded to the tabletPC via 1R or serial or USB
communication in the field. In this way the measured, desired
or absent detail points can be marked on the screen-view of
the photograph of the historical object. Many other
measurements, apart from those gathered with a total station,
can be used. The disto-steel type, any other type of
measurement or attribute, can be marked on the screen view.
In this way numerous digital sketches from different angles
and heights can be prepared; these digital shots can then be
stitched in graphicenvironment and eventually even a
panoramic view can be produced. In this process the pattern
samples of historical objects can be gathered in order to use
in the production of 3D models for the objects. With the
practical and effective usage of technology, the survey team
and survey time will also decrease.
ARCHITECTURAL SURVEY
In architectural documentation, the process and the quality of
the on site survey is generally formed and affected by the
building conditions and the whole project process. The size
and the scale of the built mass usually determines the survey
method and techniques. The aim of the survey and post
survey process impact the choice of technique and equipment
used. The traditional methods for the survey require
architects to work on site in great detail for a long periods of
time. This system used for the traditional survey is slow
and labor intensive because most architectural details are
recorded manually. This traditional process also requires
many checks and controls because the data collection is being
conducted by various individuals and the human error factor
is therefore quite high. This extends the duration of the on
site survey time and restricts the interaction between the
actual survey and the final project. On the other hand,
surveys of large scale architectural or archaeological
complexes always risk being insufficiently documented
because of there are frequently limitations of time and
financial resources. With traditional methods, the
architectural survey takes a very long time and is
problematic because the trade off for accuracy versus the time
and money consumed is often too high. In an
interdisciplinary documentation such as the Ottoman
fortification survey and documentation project we discovered
that the traditional survey system was inadequate and did not
satisfy the diverse research goals of the project. The newer
technology for surveying and the development of several
digital survey components allow different disciplines in a
documentation project to function harmoniously and to
realize goals in a more timely and feasible manner.
The methodology used in a survey is very important, it also
effects the final products of the project. An architectural
project is usually prepared and used by a definite and very
limited group of people; it doesn’t always attempt to be
accessible to other colleagues or researchers in other
professions. For this reason the collected data is rarely
presented in a highly accessible format and is not made
available to others. The survey completes its mission by
gathering needed data for the limited goal of producing the
project. Ideally, if both the survey and project were
conducted in a more systematic way, the valuable
information that had been collected could be made accessible
to a much wider audience, perhaps even placed in the
internet. Ultimately the use of the information in GIS on the
web would present the collected data in a form that can be
accessed by anyone who is interested in the documentation
process of a particular site or structure. With the integration
of the other disciplines and diverse facets of the project
research, continuous data sharing is essential, and should
generate a totally different systematic organization of data
collection in architectural heritage projects. (Architectural
Heritage: Inventory and Documentation Methods in Europe,
1993)
It is useful to examine how academics, architects and
conservationists who share a concern about protecting the
cultural heritage of a particular site or region, can develop a
systematic, integrated, and efficient approach and process for
the preservation, restoration and reconstruction of the
historical structures. Information about the restoration
procedures taken, what techniques worked and what did not,
what historical or archival documentation exists for a
particular structure is rarely shared. As a result numerous
survey and documentation processes are often repeated
needlessly; the 'wheel’ reinvented several times. From this
point of view, it is urgent to see where the disjuncture exists
and how we are losing time and monetary resources because
of the lack of a systematic methodological approach for
heritage recording and a centralized database for information
that is gathered by all working in the various fields that
intersect with cultural heritage documentation.
Recently as a result of interdisciplinary interactions and
research, the digital survey equipments being used by other
professions such as electronic tacheometers, GPS (Global
Positioning Systems), digital photogrammetric cameras have
been tested and adapted in the architectural survey system.
These equipments provide data in a short time period;
generally decreasing the time involved in the on site survey
process one-third . While the electronic tacheometers, GPS
and aerial photogrammetry are used in the general survey of
the mass and the deformation of the structure; TPS, the close
range photogrammetry and scanners are used to document the
facade details and texture. Any architect or engineer can use
the collected data if it is gathered in proper way; the
perception of the data is the same because of the high degree
of accuracy. The practical usage of this digital equipments in
architectural surveys and documentation projects has created
a need for standardization and for techniques that can be
used for both digital and non-digital measurements so that
the documentation and further usage of the data can be better
organized. Digital data storage has importance in
architectural survey due to the subsequent steps which lead
to preservation, restoration and reconstruction process. This
standardization and methodology can differ due to the
building scale and the particular processes involved in the
realization of the project, but in historic documentation work
there should be principle criteria in order to reuse and
represent the survey data and the surveys of different periods
which are used in the evaluation of the architecture.
Architectural heritage recording also includes the recent