Re: UTM in search & rescue
- From: "KBH" <KBH@xxxxxxxxxxx>
- Date: Tue, 21 Nov 2006 12:57:08 -0500
The subject has gone into discussion of MGRS and USNG.
The problem with MGRS and USNG is that they require an algorithmic
conversion from UTM rather than an arithmetic conversion from UTM. Also,
beginning with a point converted from UTM it is possible to define another
point relative to the first point as being in the same longitudinal zone
while it is actually in the next longitudinal zone. Then a third point a
few meters East of the second point can actually be in the same
longitudinal zone as the first point. So this second problem shows that
MGRS is a draftsman's layout rather than a computation.
Actually, I meant there is a problem with USNG in certain areas of
latitudinal zone boundaries. The KBH Grid Reference does not rely on
latitudinal zones but simply counts from the equator...with letter
designations.
And so the USNG derived from MGRS is another example of politicians
dropping commandments from the sky and ignoring efficiencies and
fundamentals.
Here is a link to the KBH Grid Reference that is a simple arithmetic
conversion from UTM:
http://www.kbhscape.com/gr.htm
But note the example of a one-hundred meter square...
.
- References:
- UTM in search & rescue
- From: Paul Hirose
- Re: UTM in search & rescue
- From: KBH
- UTM in search & rescue
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