Choose from one of the following categories.

• Decimal Degrees Convert between Decimal Degrees, and Degrees/Minutes/Seconds.
   
• Great Circle, Bearings Calculate the great circle bearings between two latitude/longitude points.
   
• Great Circle, Distance Calculate the great circle distance and midpoint between two latitude/longitude points.
   
• Ordnance Survey grid Convert to and from OSG used in the UK and Latitude/Longitude.