I've found this site to be of great value, too:
http://no.nonsense.ee/qth/map.html
73,
Jon Pearl - W4ABC
www.w4abc.com
On 4/15/2016 1:42 AM, David Pruett wrote:
The note from KK6MC is a good overview about how distances between two
grid squares can be calculated. Once the distance is calculated, all
that is needed is a little more math to apply the ARRL's proposed
scoring rules to calculate the QSO point value.
People should not worry about how accurate their calculation is, or
whether they make the calculation at all. I am a volunteer log
checker for the ARRL (ARRL 10M Contest) and all logs are fully scored
by the logcheckers and there are no penalties if the claimed score in
the log doesn't agree.
Of course, most people like to see their claimed score before they
send in the log (to know approximately where they finished in regards
to other stations and existing records). My point here is that if
your claimed score is off by a few percent due to differences in the
distance algorithm you use vs. what the ARRL will use, there will be
no negative impact.
73, Dave, K8CC
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