| Title: | Haversines are not Slow |
|---|---|
| Description: | The haversine is a function used to calculate the distance between a pair of latitude and longitude points while accounting for the assumption that the points are on a spherical globe. This package provides a fast, dataframe compatible, haversine function. For the first publication on the haversine calculation see Joseph de Mendoza y Ríos (1795) <https://books.google.cat/books?id=030t0OqlX2AC> (In Spanish). |
| Authors: | Alex Hallam [aut, cre] |
| Maintainer: | Alex Hallam <[email protected]> |
| License: | MIT + file LICENSE |
| Version: | 0.1 |
| Built: | 2024-12-07 06:32:20 UTC |
| Source: | CRAN |
Calculate the haversine distance in kilometers given lat/lon pairs
haversine(lat1, lon1, lat2, lon2)haversine(lat1, lon1, lat2, lon2)
lat1 |
A vector of latitudes |
lon1 |
A vector of longitudes |
lat2 |
A vector of latitudes |
lon2 |
A vector of longitudes |
a vector of distances in kilometers
# simple haversine calculation lon1 <- runif(-160, -60, n = 10e6) lat1 <- runif(40, 60, n = 10e6) lon2 <- runif(-160, -60, n = 10e6) lat2 <- runif(40, 60, n = 10e6) df <- data.frame(lat1, lon1, lat2, lon2) df$havers <- haversine(df$lat1, df$lon1, df$lat2, df$lon2)# simple haversine calculation lon1 <- runif(-160, -60, n = 10e6) lat1 <- runif(40, 60, n = 10e6) lon2 <- runif(-160, -60, n = 10e6) lat2 <- runif(40, 60, n = 10e6) df <- data.frame(lat1, lon1, lat2, lon2) df$havers <- haversine(df$lat1, df$lon1, df$lat2, df$lon2)