[aprssig] APRS coverage maps for the American West

[apratt at bestbits.org]

As I threatened to do a little while ago, I have taken three months'
worth of data from the APRSWorld archives and used it to create
coverage maps for California and the American West.

You can go to http://www.bestbits.org/aprs to see the results of my
study. (Follow the "Coverage maps" link.)

The data I used is not complete: it only stores one position per
station per hour. Also, the data doesn't support a "hop count" study,
and I couldn't tell if any reports were from stations that were
feeding APRS-IS directly (not over the air). You can see more about
what I did by going to the report page on BestBits.

Thanks everybody for the help and info. Who knows? I might keep
fiddling with this and maybe do it again for the Eastern US.

-- Allan Pratt, apratt at bestbits.org