CIPA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey
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These techniques were used for the architectural survey of
standing structures at Ile de la Passe, Mauritius. The fieldwork
for this research was conducted by Geoffrey and Françoise
Summers in January 2002. Post-fieldwork processing was done
at METU with the help of postgraduate students. The islet
guards the entrance through the coral reef into Grand Port and
played a critical part in the last Napoleonic naval victory
against the British. Standing monuments include defences and
military structures built during the eighteenth century French
colonial period and the following British occupation from 1810
to World War II. The archaeological and architectural survey
was initiated by the Mauritius National Heritage Trust to
document remains and standing structures and permit the
implementation of appropriate approaches to cultural heritage
issues, including preservation and conservation. A proper
understanding of what survives is essential before a programme
of cultural assets enhancement for presentation to contemporary
and future generations of Mauritians and tourists can be
proposed.
With very limited time and resources in the field, full
documentation of all structures was successfully completed. All
standing buildings were photographed and basic measurements
taken. Width, length, heights and a sufficient number of control
points, either distinctive features or chalk-marked crosses, were
measured. One example illustrated here (Fig. 6) is the rear
elevation of the Central Building clearly built in two phases.
Simple sketches to record key measurements were drawn in the
field and the AutoCAD ortho drawings produced in the office
during the post fieldwork study. The digital photos were
rectified and aligned in AutoCAD to the selected control points,
details were then digitised onto the elevation drawing and it was
further possible to produce a stone for stone inked drawing
from a scaled printout (Fig. 6).
Two more examples, from lie de la Passe, illustrate the
documentation of structures. The hot shot furnace (Fig. 7), built
during the French occupation period, was presented as
elevations with aligned photos giving the desired detailed
information without the necessity for the time consuming
production of a stone for stone drawing. Finally the photo
realistic 3D model of the small stepped structure (Fig. 8)
demonstrates the use of PhotoModeler to match photos to their
respective surface on a 3D model drawn in AutoCAD with
given measurements.
FRONT ELEVATION WITH PHOTO NE ELEVATION WITH PHOTO
REAR ELEVATION WITH PHOTO
SW ELEVATION WITH PHOTO
HOT SHOT FURNACE
Figure 7. Rectified photo and elevation drawings of the hot shot furnace on He de la Passe, Mauritius.
Figure 8. The small stepped structure, probably a Hag pole emplacement, on He de la Passe, Mauritius, was reproduced as a 3D
model in PhotoModeler by Qagatay Karipta?. The cropped portion of photograph used for each Hat plane was matched to the
corresponding surface of the model.
