formula :
Recommended by the IARU Region 1 VHF Committee
(Noordwijkerhout, 1987), i.e. the formula proposed by PZK,
for calculating distances in VHF and Above Contests and
the "commenced km" points rounding method (Lillehammer, 1999).
Distance = 111,2 * arccos(sin Latitude1 * sin Latitude2 + cos Latitude1 * cos Latitude2 * cos(Longitude1-Longitude2))
where the conversion factor is 111,2 km/deg.
| Points rounding methods (zaokruživanje) |
| Distance | Commenced km | Math | Truncation |
| 0 km | 1 | 0 | 0 |
| 43,2 km | 44 | 43 | 43 |
| 56,7 km | 57 | 57 | 56 |
|
