check_coordinates: Check coordinate columns and determine whether conversion is...

In SamsaRaLight: Simulate Tree Light Transmission Using Ray-Tracing

Check coordinate columns and determine whether conversion is required

Description

This function checks whether a data frame contains valid planar coordinates (x, y) or geographic coordinates (lon, lat). If geographic coordinates are detected, the user is informed that they must be converted to a planar coordinate system using create_xy_from_lonlat().

Usage

check_coordinates(df, verbose = TRUE)

Arguments

df	A data.frame containing spatial coordinates.
verbose	Logical. If TRUE, informative messages are printed.

Value

Logical. Invisibly returns TRUE if coordinates must be converted from longitude/latitude to planar coordinates, and FALSE if planar coordinates are already present.

Examples

df_xy <- data.frame(x = 1:3, y = 4:6)
check_coordinates(df_xy)

df_lonlat <- data.frame(lon = c(10, 11), lat = c(45, 46))
check_coordinates(df_lonlat, verbose = TRUE)

SamsaRaLight documentation built on April 16, 2026, 5:08 p.m.