Spherical Trigonometry
Along Track Distance
Antipodes
Area of a longitude/latitude polygon
Direction of travel
Rhumbline direction
Centroid of spherical polygons
World countries
Daylength
Destination given bearing (direction) and distance
Destination along a rhumb line
Cross Track Distance
Distance between points and lines or the border of polygons.
'Law of cosines' great circle distance
Distance on an ellipsoid (the geodesic)
'Haversine' great circle distance
Distance matrix
'Meeus' great circle distance
Distance along a rhumb line
'Vincenty' (ellipsoid) great circle distance
'Vincenty' (sphere) great circle distance
Final direction
Intersections of two great circles
Intersections of two great circles
Latitude on a Great Circle
Longitude on a Great Circle
Highest latitude on a great circle
geodesic and inverse geodesic problem
Mean location of sperhical coordinates
Geosphere
Great circle
Great circle
Distance to the horizon
Intermediate points on a great circle (sphere)
Length of lines
Add vertices to a polygon or line
Mercator projection
Mid-point
Is a point on a given great circle?
Ordnance Survey for Great Britain grid reference system
Compute the perimeter of a longitude/latitude polygon
Plot
Random or regularly distributed coordinates on the globe
Reference ellipsoids
Span of polygons
Spherical trigonometry for geographic applications. That is, compute distances and related measures for angular (longitude/latitude) locations.