James S. Kaplan wrote:
> WGS-84, NAD-27, etc are DATUMS, a means to correct the grid of abberations
> in the N/S axis on a particular map projection.
>
> NAD-27 is based on sightings and hand surveying, while WGS-84 is primarily
> based on aerial photography.
>
> For ham use, the error between datums are generally small, up to several
> hundred kilometers and typically less than several kilometers. So, don't worry
> about it unless you're sighting a repeater or into intensive propagation
> analysis from fixed sites.
Hi James,
Yep, the datum makes a difference, albeit a small one.
However, my minor grid square is
only 2x2km, and I'm very close to its "border"
(and I'm a precise person). What it comes down to
is that I'm in different minor squares
in Eur50 and WGS84. Hence my question.
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
