is_lonlat: Check for Longitude/Latitude Coordinates

In GeoThinneR: Efficient Spatial Thinning of Species Occurrences

Check for Longitude/Latitude Coordinates

Description

This function checks whether a pair of coordinate vectors represent geographic longitude and latitude values. The function returns 'TRUE' if all longitude values are within -180 (- tolerance) and 180 (+ tolerance) and the latitude is within -90 (- tolerance) and 90 (+ tolerance).

Usage

is_lonlat(lon, lat, tolerance = 0.1)

Arguments

lon	Numeric vector of longitudes in degrees.
lat	Numeric vector of latitudes in degrees.
tolerance	Numeric tolerance (in degrees) for checking the global longitude/latitude bounds. Default is 0.1.

Value

A logical value. 'TRUE' if values are within the ranges and 'FALSE' otherwise.

Examples

is_lonlat(lon = c(-3, 10, 179), lat = c(40, -20, 5))
is_lonlat(lon = c(100000, 150000), lat = c(4500000, 4600000))

GeoThinneR documentation built on Nov. 25, 2025, 9:07 a.m.