latlong2km: Convert latitude and longitude to Northings and Eastings

In dsm: Density Surface Modelling of Distance Sampling Data

Convert latitude and longitude to Northings and Eastings

Description

Convert longitude and latitude co-ordinates to kilometres west-east and south-north from axes through (lon0,lat0) using the "spherical law of cosines".

Usage

latlong2km(lon, lat, lon0 = sum(range(lon))/2, lat0 = sum(range(lat))/2)

Arguments

lon	longitude
lat	latitude
lon0	longitude reference point (defaults to mean longitude)
lat0	latitude reference point (defaults to mean latitude)

Details

WARNING: This is an approximate procedure for converting between latitude/ longitude and Northing/Easting. Consider using projection conversions available in packages sp, sf and rgdal for better results.

Value

list with elements km.e and km.n.

Author(s)

Simon N. Wood

dsm documentation built on Sept. 9, 2025, 5:49 p.m.