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Title
Proceedings of the Symposium on Progress in Data Processing and Analysis

20
The absolute orientation of the stereomodel is supported within PHOCUS by an
orientation program which computes the setting data for the orientation ele
ments, while making allowance for the different types of terrain involved. If
a model has already been oriented in PIanicomp and stored in the stereomodel
file, e.g. during a aerotriangulation measurement and adjustment process,
this orientation data is used for the computation of the setting data. As a
result, the speed of relative and absolute orientation of the stereomodel is
considerably increased. After completion of the orientation process, the
transformation parameters are transferred by a driver program to the digiti
zing and interface unit. The driver program also ensures that input data is
correctly supplied to the internal PHOCUS interface. The data acquisition
programs can therefore be used without modifications both in the PIanicomp
and the analog instrument. These
The PHOCUS multi-workstation system permits the connection of several analog
instruments to one computer, with the possibility of combining them with
PI ani comp, digitizing and editing stations.
2.3 PHOCUS DEM Measurement Program
2.3.1 MDTM
The standard measuring program for digital elevation models (MDTM) comprises
the functions:
Measurement of single points
Manual positioning of the floaing mark or
prepositioning using the input file, e.g.
for the determination of volumes
Measurement of a regular grid
Prepositioning of the floating mark to a
selectable, regular grid
2.3.2
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