Let me clarify for the non-believers. Datums are hand entered data. Hence, each
set of "points" measured have their own unique errors. It is not uncommon for a
multi-kilometer error to exist on a USGS paper map or in it's digital
counterpart. Multiply that by the error in a previous or alternate datum and
you *may* have abberations of several hundred kilometers.
I worked for a firm that made our living selling software which mapped
propagation onto precise screen and print maps. The errors in USGS and other
data sets like UK's are incredible and numerous.
On Thu, 29 Apr 1999, Jan de Jongh wrote:
>James S. Kaplan wrote:
>BTW, from what I know, the order of magnitude of
>the errors between datums is in the order of tens to hundreds of
>meters, not kilometers (at least, not here, at 52N, 4E)...
>Well, we're drifting off the subject anyway -)
>
>Ciao,
>Jan
>
><snip>
>
>--
>Jan de Jongh
>ICQ 29902882
>[EMAIL PROTECTED]
>http://www.casema.net/~jjf
--
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James S. Kaplan KG7FU
Eugene Oregon USA
[EMAIL PROTECTED]
http://www.rio.com/~kg7fu
Have YOU tried Linux today?
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