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Our
work focuses on the problem of obtaining volumetric data from
an excavation.
Last May in Tell Leilan (Syria) a 9x1x3 m area was excavated,
in which 23 of the 47 lots recognized was entirely floated
and sieved. We decided to use an ETS survey of the sections
enclosing the area to calculate the volume of each lot.
Once georeferenced we put them together in the same 3D Scene
of ArcView 3D Analyst, linking each lot with the excavation
DB.
In this way, each section maintains its original spatial relationship
and the user has infinite points of view of the area.
The link between the tables of attributes of the 4 sections
enables us, with a simple query, to isolate a certain lot
in each section. Once saved in a new shape file, the result
of the query (at least 2 polygons) becomes the base for our
volume calculation. Each polygon is divided in CAD into 2
polylines (upper and lower half) and 2 different TINs are
generated from both "upper" and "lower"
polylines. Finally with the "Cut Fill" tool of 3D
Analyst we calculated the space between the 2 TINs, the lot
volume.
Key words: volumes, 3D Analyst, stratigraphy, sections
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