alongTrackDistance      Along Track Distance
antipode                Antipodes
bearing                 Bearing
bearingRhumb            Rhumbline bearing
crossTrackDistance      Cross Track Distance
daylength               date routines
destPoint               Destination given bearing and distance, when
                        following a great circle
destPointRhumb          Destination along a rhumb line
distCosine              'Law of cosines' great circle distance
distHaversine           'Havesine' great circle distance
distRhumb               Distance along a 'rhumb line'
distVincentyEllipsoid   'Vincenty' (ellipsoid) great circle distance
distVincentySphere      'Vincenty' (sphere) great circle distance
finalBearing            Final bearing
gcIntermediate          Intermediate points on a great circle
gcIntersect             Intersections of two great circles
gcLat                   Latitude on a Great Circle
gcLon                   Longitude on a Great Circle
gcMaxLat                Highest latitude on a great circle
geosphere-package       Spherical Trigonometry
greatCircle             Great circle
midPoint                Mid-point
rhumbIntersect          Intersecting radials
