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bdata - applies editing instructions to a database
The automatic data editor creates an ASCII file containing editing instructions
but does not apply these instructions. Likewise the user, via the plotting
program or, most basically, with a text editor can do the same manually.
bdata provides the method for applying these editing instructions
to the binary GPS databases. In doing this task, bdata will
The input, original dt.dat file is preserved. The or.dat and
hd.dat are renamed but otherwise unmodified. This strategy make it
possible to recover the unedited database simply by renaming the or.dat
and hd.dat files.
- read the input dt.dat file, apply the instructions as appropriate
and write a new dt.dat with the user's designation,
- move the or.dat file to the the new name designation and
- move the hd.dat file to the the new name designation.
bdata is controlled through the bdata.inp file. Like
bdata, this is a simple file containing three lines:
NOTE: bdata will not correctly accept paths as part
of the name.
- the input database designation,
- the output database designation and
- the name of the file containing the edit instructions.
bdata will recognize two database designation types:
- old four character designation (e.g. a251),
- newer six character designation (e.g. aybo00),
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January 14, 2000