For example,  you publish  an AC drawing of an aircraft component that
has engineered safety margins. Anyone who has auto cad can modify the
drawing without your approval.   They could even distribute the modified
drawing as if it was your original.  If you had published the drawing as
a PDF all they could do is look at it.   --- Jerry

That would be easy to change. There are programs that scan in
captured bit maps and convert them to ACAD dwg files.

Paul Lamar

Paul, we publish our engineering docs in PDF and password them. Our config
and master data list refer to the drawings by drawing number and filename.
Has worked for us so far.

Hell, if what you have can be printed or displayed on a screen, it can be
modified by someone determined enough.

Mike Harrington

I suspect most blue print houses can convert hand done drawings (bit maps) to
ACAD dwg files. I know Lomita Blueprint here in So Cal could do that 15 or 20 
years ago. They used a plotter that was converted to a scanner.

Paul Lamar


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