# Spherical Trigonometry

## Documentation for package ‘geosphere’ version 1.5-20

- DESCRIPTION file.
- User guides, package vignettes and other documentation.

## Help Pages

geosphere-package | Geosphere
alongTrackDistance | Along Track Distance
antipodal | Antipodes
antipode | Antipodes
areaPolygon | Area of a longitude/latitude polygon
areaPolygon-method | Area of a longitude/latitude polygon
bearing | Direction of travel
bearingRhumb | Rhumbline direction
centroid | Centroid of spherical polygons
centroid-method | Centroid of spherical polygons
daylength | Daylength
destPoint | Destination given bearing (direction) and distance
destPointRhumb | Destination along a rhumb line
dist2gc | Cross Track Distance
dist2Line | Distance between points and lines or the border of polygons.
distCosine | 'Law of cosines' great circle distance
distGeo | Distance on an ellipsoid (the geodesic)
distHaversine | 'Haversine' great circle distance
distm | Distance matrix
distMeeus | 'Meeus' great circle distance
distRhumb | Distance along a rhumb line
distVincentyEllipsoid | 'Vincenty' (ellipsoid) great circle distance
distVincentySphere | 'Vincenty' (sphere) great circle distance
finalBearing | Final direction
gcIntermediate | Intermediate points on a great circle (sphere)
gcIntersect | Intersections of two great circles
gcIntersectBearing | Intersections of two great circles
gcLat | Latitude on a Great Circle
gcLon | Longitude on a Great Circle
gcMaxLat | Highest latitude on a great circle
geodesic | geodesic and inverse geodesic problem
geodesic_inverse | geodesic and inverse geodesic problem
geomean | Mean location of sperhical coordinates
geosphere | Geosphere
greatCircle | Great circle
greatCircleBearing | Great circle
horizon | Distance to the horizon
lengthLine | Length of lines
makeLine | Add vertices to a polygon or line
makePoly | Add vertices to a polygon or line
merc | World countries
mercator | Mercator projection
midPoint | Mid-point
onGreatCircle | Is a point on a given great circle?
OSGB | Ordnance Survey for Great Britain grid reference system
perimeter | Compute the perimeter of a longitude/latitude polygon
perimeter-method | Compute the perimeter of a longitude/latitude polygon
plotArrows | Plot
randomCoordinates | Random or regularly distributed coordinates on the globe
refEllipsoids | Reference ellipsoids
regularCoordinates | Random or regularly distributed coordinates on the globe
span | Span of polygons
span-method | Span of polygons
wrld | World countries