GreatCircleIntersection: Point(s) at which two Great Circles intersect on a sphere

In laurasoul/dispeRse: Models For Paleobiogeography

Description

Given two Great Circles returns point(s) at which they intersect on a sphere.

Usage

GreatCircleIntersection(
  longitude_1,
  latitude_1,
  longitude_2,
  latitude_2,
  longitude_3,
  latitude_3,
  longitude_4,
  latitude_4,
  EarthRad = 6367.4447
)

Arguments

longitude_1	Decimalised longitude of first point on first Great Circle.
latitude_1	Decimalised latitude of first point on first Great Circle.
longitude_2	Decimalised longitude of second point on first Great Circle.
latitude_2	Decimalised latitude of second point on first Great Circle.
longitude_3	Decimalised longitude of first point on second Great Circle.
latitude_3	Decimalised latitude of first point on second Great Circle.
longitude_4	Decimalised longitude of second point on second Great Circle.
latitude_4	Decimalised latitude of second point on second Great Circle.
EarthRad	Earth radius in kilometres.

Details

Nothing yet.

Value

Matrix of longitude-latitude points at which intersection(s) occur.

Author(s)

Graeme T. Lloyd [e-mail]

Examples

longitude_1 <- stats::runif(1, -180, 180)
longitude_2 <- stats::runif(1, -180, 180)
longitude_3 <- stats::runif(1, -180, 180)
longitude_4 <- stats::runif(1, -180, 180)
latitude_1 <- stats::runif(1, -90, 90)
latitude_2 <- stats::runif(1, -90, 90)
latitude_3 <- stats::runif(1, -90, 90)
latitude_4 <- stats::runif(1, -90, 90)
GreatCircleIntersection(longitude_1, latitude_1, longitude_2, latitude_2,
  longitude_3, latitude_3, longitude_4, latitude_4)

laurasoul/dispeRse documentation built on May 25, 2021, 4:50 a.m.