Description Usage Arguments Value Author(s) Examples

View source: R/onGreatCircle.R

Test if a point is on a great circle defined by two other points.

1 | ```
onGreatCircle(p1, p2, p3, tol=0.0001)
``` |

`p1` |
Longitude/latitude of the first point defining a great circle, in degrees; can be a vector of two numbers, a matrix of 2 columns (first one is longitude, second is latitude) or a SpatialPoints* object |

`p2` |
as above for the second point |

`p3` |
the point(s) to be tested if they are on the great circle or not |

`tol` |
numeric. maximum distance from the great circle (in degrees) that is tolerated to be considered on the circle |

logical

Robert Hijmans

1 |

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