Global soil data

Download global soils data. The data are derived from the SoilGRIDS database. The data were aggregated and transformed to a longitude/latitude coordinate reference system with 30-second spatial resolution.

See https://www.isric.org/explore/soilgrids for more info.

data license: CC-BY 4.0

Note that currently only the "mean" values for up to 60cm depth are available.

Usage

soil_world(var, depth, stat="mean", name="", path, vsi=FALSE, ...)

Arguments

var

character. Variables name. One of: "bdod", "cfvo", "clay", "nitrogen", "ocd", "ocs", "phh2o", "sand", "silt", "soc", "wrb". See Details

depth

numeric. One of 5, 15, 30, 60, 100, 200. This is shorthand for the following depth ranges: 0-5, 5-15, 15-30, 30-60, 60-100, 100-200 cm. Ignored if var="wrb"

stat

character. One of "mean", "uncertainty", "Q0.05", "Q0.5", "Q0.95". Ignored if var="wrb"

name

character. One of "Acrisols", "Albeluvisols", "Alisols", "Andosols", "Arenosols", "Calcisols", "Cambisols", "Chernozems", "Cryosols", "Durisols", "Ferralsols", "Fluvisols", "Gleysols", "Gypsisols", "Histosols", "Kastanozems", "Leptosols", "Lixisols", "Luvisols", "Nitisols", "Phaeozems", "Planosols", "Plinthosols", "Podzols", "Regosols", "Solonchaks", "Solonetz", "Stagnosols", "Umbrisols", "Vertisols". Only used when var="wrb"

path

character. Path for storing the downloaded data. See geodata_path

vsi

logical. If TRUE, a virtual connection to the file is used in stead of a download. This allows downloading a small area only by subsequently using crop or window

...

additional arguments passed to download.file

Value

SpatRaster

Details

	var	description	unit
	bdod	Bulk density of the fine earth fraction	kg dm-3
	cec	Cation Exchange Capacity of the soil	cmol(+) kg-1
	cfvo	Vol. fraction of coarse fragments (> 2 mm)	%
	nitrogen	Total nitrogen (N)	g kg-1
	phh2o	pH (H2O)	-
	sand	Sand (> 0.05 mm) in fine earth	%
	silt	Silt (0.002-0.05 mm) in fine earth	%
	clay	Clay (< 0.002 mm) in fine earth	%
	soc	Soil organic carbon in fine earth	g kg-1
	ocd	Organic carbon density	kg m-3
	ocs	Organic carbon stocks	kg m-2

References

Poggio L., de Sousa L.M., Batjes N.H., Heuvelink G.B.M., Kempen B., Ribeiro E., Rossiter D., 2021. SoilGrids 2.0: producing soil information for the globe with quantified spatial uncertainty. Soil 7:217-240, 2021. doi:10.5194/soil-7-217-2021

See also

For virtual access to the original data: soil_world_vsi For Africa: soil_af_isda, soil_af, soil_af_elements

Examples

# \donttest{
# this downloads a large file 
gph <- soil_world(var="phh2o", depth=5, path=tempdir())
# }