Contents
Which is the latest version of SoilGrids?
The latest release of SoilGrids (May 2020) can be accessed through the following services: WMS: access for visualisation and data overview. Instructions for using WMS with commonly used GIS software can be found here WCS: best way to obtain a subset of a map and use SoilGrids as input to other modelling pipelines.
What are the uncertainties in the SoilGrids model?
SoilGrids contains predictions and associated prediction uncertainties for basic soil properties, following the GlobalSoilMap IUSS working group and its specifications: pH (in water), texture fractions, coarse fragments, bulk density, total nitrogen, organic carbon concentration and cation exchange capacity.
Which is the global gridded Soil Information System?
A system for digital soil mapping based on global compilation of soil profile data and environmental layers SoilGrids TM (hereafter SoilGrids) is a system for global digital soil mapping that uses state-of-the-art machine learning methods to map the spatial distribution of soil properties across the globe.
How can SoilGrids be used as a covariate?
For continents and regions, SoilGrids predictions can be used as a covariate to improve prediction of soil properties through e.g. regression-kriging. Simply download SoilGrids, run overlay with the point data and then use the SoilGrids layers as a covariate to predict or adjust the values of target variables locally.
How to download SoilGrids data on macOS Catalina?
I’m trying to download the ISRIC SoilGrids data via R (Version 3.6.2 on macOS Catalina Version 10.15.5) as described in the tutorial here: https://www.isric.org/explore/soilgrids/soilgrids-access Following this guide I can download the data for the small example bounding box.
What are the properties of soil in SoilGrids?
Maps of the following soil properties are available: pH, soil organic carbon content, bulk density, coarse fragments content, sand content, silt content, clay content, cation exchange capacity (CEC), total nitrogen as well as soil organic carbon density and soil organic carbon stock. For additional information please visit the SoilGrids FAQ page.
How is prediction uncertainty measured in soilgrids.org?
Prediction uncertainty is quantified by the lower and upper limits of a 90% prediction interval. The additional uncertainty layer displayed at soilgrids.org is the ratio between the inter-quantile range and the median.