| Type: | Package |
| Title: | Calculation of the Surface Temperature (Ts) from Geospatial Raster Data |
| Version: | 1.0.1 |
| Date: | 2026-02-13 |
| Description: | Provides functions to calculate the Surface Temperature (Ts) from geospatial raster data. These functions use albedo, Normalized Difference Vegetation Index (NDVI), and air temperature (Ta) to estimate Ts, facilitating hydrological, ecological, and remote sensing analyses. |
| License: | GPL-3 |
| Encoding: | UTF-8 |
| RoxygenNote: | 7.3.2 |
| Imports: | stats, terra |
| Suggests: | testthat (≥ 3.0.0) |
| NeedsCompilation: | no |
| Packaged: | 2026-02-13 13:47:59 UTC; hamelin |
| Author: | Gaelle Hamelin 
[aut, cre] |
| Maintainer: | Gaelle Hamelin <gaelle.hamelin@institut-agro.fr> |
| Repository: | CRAN |
| Date/Publication: | 2026-02-17 22:20:09 UTC |
Calculate the Surface Temperature (Ts)
Description
This function calculates the surface temperature (Ts) from three rasters: albedo, NDVI, and air temperature (Ta). The resulting Ts raster will have the same unit as Ta.
Usage
calculate_Ts(albedo, ndvi, Ta, output_path = NULL, verbose = FALSE)
Arguments
albedo |
RasterLayer/SpatRaster of albedo values |
ndvi |
RasterLayer/SpatRaster of NDVI values |
Ta |
RasterLayer/SpatRaster of air temperature (Ta) in Kelvin |
output_path |
File path to save the Ts raster (optional) |
verbose |
Logical; if TRUE, prints information about dry/wet edges, T_min/T_max, and unit info. Default is TRUE. |
Value
SpatRaster of surface temperature (Ts) in the same unit as Ta
Examples
library(terra)
albedo_raster <- rast(system.file("extdata", "albedo_mini.tif", package = "Ts"))
Ta_raster <- rast(system.file("extdata", "Ta_mini.tif", package = "Ts"))
ndvi_raster <- rast(system.file("extdata", "ndvi_mini.tif", package = "Ts"))
output_path <- tempfile(fileext = ".tif")
calculate_Ts(
albedo = albedo_raster,
Ta = Ta_raster,
ndvi = ndvi_raster,
output_path = output_path,
verbose = TRUE
)
print(output_path)