Description Usage Arguments Value Author(s) References See Also Examples

Longitudes at which a great circle crosses a latitude (parallel)

1 | ```
gcLon(p1, p2, lat)
``` |

`p1` |
longitude/latitude of point(s). 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 |

`lat` |
a latitude |

vector of two numbers (longitudes)

Robert Hijmans based on code by Ed Williams

http://www.edwilliams.org/avform.htm#Intersection

1 |

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