raster_rescale: Rescale raster values

In NINAnor/oneimpact: Tools for the assessment of the cumulative impacts of anthropogenic features in ecological studies

Rescale raster values

Description

Rescales raster values to a given range (by default, to the range 0,1).

Usage

raster_rescale(x, to = c(0, 1), from = NULL)

Arguments

x	⁠[SpatRaster]⁠ Raster object or colletion of rasters whose values will be rescaled.
to	⁠[numeric(2)=c(0,1)]⁠ Range of final values (in the format c(min,max)) to which the raster will be rescaled.
from	⁠[numeric(2)=NULL]⁠ Range of original values (in the format c(min,max)) from which the raster will be rescaled. If NULL, the minimum and maximum values from x are used.

Value

A raster object (or collection of rasters) with values rescaled to a given range (e.g. to the interval 0,1).

Examples

library(terra)

f <- system.file("raster/sample_area_cabins.tif", package = "oneimpact")
cabins <- terra::rast(f)

# calculate influence
ni <- calc_zoi_nearest(cabins, radius = 1000, type = "exp_decay")
ci <- calc_zoi_cumulative(cabins, radius = 1000, type = "exp_decay",
                          zeroAsNA = TRUE)
plot(c(ni, ci))

# rescale
plot(raster_rescale(ci)) # rescale to [0,1]
plot(raster_rescale(c(ni, ci))) # rescale both to [0,1]
plot(raster_rescale(c(ni, ci), to = c(0, 100))) # rescale to [0,100]
plot(raster_rescale(c(ni, ci), from = c(0, 50))) # rescale to [0,1] from [0,50]

NINAnor/oneimpact documentation built on June 14, 2025, 12:27 a.m.