In message, Koontz
John Ewrites
>On Tue, 28 Dec 2004, Rene Zandbergen wrote:
>> > I recently read about how the Ordnance Survey was able to catch a
>> > company illegally selling their maps by adding some non-existent roads
>> > to a disused air-force base (IIRC), which amounts to much the same
>> > thing.
>
>My understanding is that US roadmaps, e.g., the sort they used to give out
>for free in gas stations, that you now buy for $5-$10 in stores, are
>always made with some obscure false datum in them - a spurious road or
>town, etc. - for precisely the same reason.
>
The Ordnance Survey have long made these small deliberate errors and
secret marks; it has been official policy for at least a cen! tury I
think. There was a court case not long ago against Bartholomew's which
collapsed only when the OS people showed two of these in the illegal
copy: one was a small set of black dots, precisely positioned, and the
other was a little but obvious kink added to a minor road.
TTFN
Anthony
--
ajb@xxxxxxxxxxxxxxxxxx
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