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Figure 3: Stratification Unit 003 of Schwarzenbach. On top of the clipped, rectified image, details were drawn using 
ArcView GIS. 
Points, breaklines and 3D boundary are then automati 
cally used to create a digital elevation model of the sur 
faces (Figure 2). During this process of surface creation, 
contour lines are automatically interpolated from the trian 
gulated elevation models of each unit. The interval can be 
chosen interactively. 
6. POSTPROCESSING AND FIRST ANALYSIS 
After the importation of the entire graphic record, it is 
available in the GIS and can be checked for errors. The 
descriptive information stored in databases can now be 
linked to the graphic record. 
The rectified images are added. Experience showed, that 
in many cases, the outline of a deposit can be better rec 
ognized in the digitally enhanced image than on site. There 
fore, each boundary polygon is displayed on the rectified 
image, checked and - if necessary - corrected. Details 
like skeletons, layers of stones, ceramics, pavements etc. 
can be drawn directly on screen using the rectified images, 
while the next deposit can already be excavated. During 
this process, only those parte of the image, which lie within 
the control points can be drawn with the desired accuracy. 
The accuracy decreases largely outside of the area 
enclosed by the control points. To prevent unintentional 
drawing in the outside areas, the images can be clipped 
to the boundary polygon of the corresponding stratification 
unit (Figure 3). 
For the production of arbitrary sections out of the three 
dimensional spatial record we programmed another script, 
which enables the user to interactively calculate sections 
at any part of the excavated area. To do so, a line has to be 
drawn, which is then intersected with the triangulated 
irregular network of each underlying surface. The resulting 
intersection lines are then compiled into a new drawing 
representing the section. The advantage is clearly to be 
seen: sections can be reconstructed automatically at any 
line of interest (Figures 4 and 5). 
7. FUTURE ASPECTS OF DIGITAL RECORDING 
Terrestrial 3D imaging laser scanning forms a method to 
acquire a large number of precise data points in 3D space 
representing the surface of objects under investigation. 
These scanners are an effective tool for the collection of 
data to create a digital elevation model of the topography 
of a site as well as of the surface of a single archaeologi-