r———4 ASCAN DIGITIZER
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eat CREAN + |! SELF-REGISTERING !
MEI. uu alid |! INSTRUMENTS |
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| — DOSCAN | A LINE PRINTER !
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GSCAN i|
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ESCAN
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Figure 2: Structure of the preprocessor
GEOSCAN uses three inputfiles:
- a file containing approximate coordinates (name.crd);
- a file containing observations (name.obs);
- a file containing program options (name.opt).
The file containing approximate values is created with the help of interactive
editor ASCAN. ASCAN allows for the adding of new point identifications, for the
deletion of coordinates, etc. Figure 3 shows the main menu of this editor. It is
also possible to insert approximate coordinates by connecting a digitizer to the
computer using the communication port RS232.
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