LLtoUTM: Transverse Mercator Projection

In michaeldumelle/DumelleEtAl2021STLMM: Fit Spatio-Temporal Linear Mixed Models

Description

Project latitude and longitude spatial coordinates using a Transverse Mercator projection. Units are in kilometers, the minimum projected coordinates in the x and y direction are 0, and projected coordinates are scaled to 1 kilometer.

Usage

LLtoUTM(cm, lat, lon, xcol = "x", ycol = "y", minx = NULL, miny = NULL)

Arguments

cm	iCentral meridian. A common choice is the mean of the longitude values in your data set
lat	Vector of latitudes.
lon	Vector of longitudes.
xcol	Name of the transformed x coordinates output by the function.
ycol	Name of the transformed y coordinates output by the function.
minx	A minimum x coordinate to center by. Defaults to setting the minimum transformed coordinate to 0.
miny	A minimum y coordinate to center by. Defaults to setting the minimum transformed coordinate to 0.

Value

A list returning the transformed coordinates, central meridian argument, minimum x coordinate, and minimum y coordinate.

michaeldumelle/DumelleEtAl2021STLMM documentation built on Dec. 21, 2021, 5:56 p.m.