How is SoilGrids used in global soil mapping?
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. SoilGrids prediction models are fitted using over 230 000 soil profile observations from the WoSIS database and a series of environmental covariates.
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.
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.
How are the covariates of Soil Information selected?
Covariates were selected from a pool of over 400 environmental layers from Earth observation derived products and other environmental information including climate, land cover and terrain morphology.
When do you report the datum for lat / long coordinates?
When noting lat/long coordinates or giving lat/long coordinates to someone, you must always report the datum which is used by the coordinates. Without the datum information, the user will have to guess which datum your lat/long coordinates are in, and this often leads to misalignment of features.
How to download a SoilGrids map in ArcGIS?
To open SoilGrids files in ArcGIS, just define the projection as “World_Goode_Homolosine_Land”..your tiles will appear automatically in the right location, then you can change the projection to your preferences. I just tried this way for 30 tiles and it worked perfectly.