longlat: Create longitude/latitude rasters

In adamlilith/fasterRaster: Faster Raster and Spatial Vector Processing Using 'GRASS GIS'

Create longitude/latitude rasters

Description

longlat() creates two rasters, one with cell values equal to the longitude of the cell centers, and one with cell values equal to the latitude of the cell centers.

Usage

## S4 method for signature 'GRaster'
longlat(x, degrees = TRUE)

Arguments

x	A GRaster.
degrees	Logical: If TRUE (default), coordinate values of cells will be in degrees. If FALSE, and x is in a projected coordinate reference system, values will represent coordinates in map units (usually meters). Values will always be in degrees when the coordinate reference system is unprojected (e.g., WGS84, NAD83, etc.).

Value

A GRaster stack.

See Also

init()

Examples

if (grassStarted()) {

# Setup
library(terra)

# Example data
madElev <- fastData("madElev")

# Convert a SpatRaster to a GRaster
elev <- fast(madElev)

# Create longitude/latitude rasters
ll <- longlat(elev)
ll # note units of cell values!

}

adamlilith/fasterRaster documentation built on Oct. 26, 2024, 4:06 p.m.