Deliberate Mistakes in Data to Detect Copyright Breach

Paul Fretwell paul.fretwell at
Fri May 19 15:54:03 BST 2006

David Gibson wrote on 15/05/2006 11:46:08:

> The traditional way to thwart this defence is to deliberately introduce
> mistakes into your data - mis-spell a cave name, or change the co-
> ordinates slightly, or invent a non-existent cave. If you see a document
> containing this incorrect data, you *know* it must have been created by
> copying your data.

There is an article about this in the Open Streetmap Wiki which I came 
across recently: 


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