ET WA Er ADA ee AAA
It is clear from the above presentation
that the geodetic method was the most
accurate, but the most time consuming and
certainly the one less favoured by the
non experts who would like a better tool
for their surveys.
The main advantage of the photogrammetric
method compared to the classical one is
the photographic record, which is produ-
ced as a by product. Moreover, the DTM is
also a very useful product, as one may
come back to it at a later time and pro-
duce more cross-sections or extract other
information about the construction. A
comparison of the cost and time required
is also favouring photogrammetry, as in
less time it is capable of producing more
and better results at a fraction of the
cost.
Another important dimension of the capa-
bilities of modern computing power is the
possibility of archiving the acquired
information in a Hypermedia System. It is
feasible nowadays to integrate informa-
tion in raster form (digitized images)
and in vector form (CAD drawings) with
text in a Relational Database (Cognivi-
sion 1991, Galileo 1991). Document Image
Processing (DIP) and Optical Disk tech-
nology are the tools, which will aid this
effort (Harvey 1991).
5. REFERENCES
1. Antoniou, A., 1969. Research on ship-
building data of Greek vessels. PhD The-
sis, National Technical University of
Athens (in Greek).
2.Cognivision Research, S.A., 1991. Hy-
permap product information
3. Damianidis, K., 188%. Vernacular boats
and boatbuilding in Greece. PhD Thesis,
University of St. Andrews, Scotland.
4. Damianidis, K., Leontidis, A... 1992.
Greek wooden sailing boats of the 20th
century. Museum of Cretan Ethnology, Ga-
vrielides Editions, Athens. p. 109.
5. Galileo Siscam, 1991. GART, product
information
6. Georgopoulos A., Spinou, A., 1992. Fo-
toCAD: A simple photogrammetric package
for non-photogrammetrists. International
Archives of Photogrammetry and Remote
Sensing, Vol. 29, part 5.
7. Harvey, D.A., 1991. Catch the wave of
DIP. BYTE Magazine, Vol. 16, No 4. April
1991, pp. 173-182.
8. Historic American Buildings Survey,
1988. Guidelines for Recording Historic
Ships. (Historic American Engineering
Record) , Washington DC.
9. ICOMOS, 1964. International Charter
for the conservation and restoration of
Monuments and Sites (Charter of Venice).
10. Kokkas, T. 1991. Photogrammetric
Survey of Traditional Ships. Diploma the-
sis (unpublished), Laboratory of
Photogrammetry, NTUA.
11. Papapolitou, V., Frangski, E.. 1990.
Modern applications of Geodesy - The sur-
vey of a caique. Diploma thesis (unpubli-
shed), Laboratory of General Geodesy,
NTUA. ,
12. Pâris EF., 1882. Souvenirs de Marine.
Collection de plans ou dessins de navires
et des bateaux anciens ou modernes exi-
Stans ou disparus. Paris, 1877-1882.
