intermediate | R Documentation |

Get intermediate points (way points) between the two locations with longitude/latitude coordinates. gcIntermediate is based on a spherical model of the earth and internally uses `distCosine`

.

gcIntermediate(p1, p2, n=50, breakAtDateLine=FALSE, addStartEnd=FALSE, sp=FALSE, sepNA)

`p1` |
longitude/latitude of a single point, in degrees. This 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 for |

`n` |
integer. The desired number of intermediate points |

`breakAtDateLine` |
logical. Return two matrices if the dateline is crossed? |

`addStartEnd` |
logical. Add p1 and p2 to the result? |

`sp` |
logical. Return a SpatialLines object? |

`sepNA` |
logical. Rather than as a list, return the values as a two column matrix with lines seperated by a row of NA values? (for use in 'plot') |

matrix or list with intermediate points

Robert Hijmans based on code by Ed Williams (great circle)

https://www.edwilliams.org/avform147.htm#Intermediate

gcIntermediate(c(5,52), c(-120,37), n=6, addStartEnd=TRUE)

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