SOLUS: Soil properties of the conterminous United States at 100-m resolution

USDA/SOLUS100/V0
Dataset Availability
2023-12-15T00:00:00Z–2024-01-01T00:00:00Z
Dataset Producer
Earth Engine Snippet
ee.ImageCollection("USDA/SOLUS100/V0")
Cadence
1 Year
Tags
soil usda

Description

SOLUS (Soil Landscapes of the United States) is a national map product developed by the National Cooperative Soil Survey that is focused on providing a consistent set of spatially continuous soil property maps to support large scope soil investigations and land use decisions. SOLUS maps use a digital soil mapping framework that combines multiple sources of soil survey data with environmental covariate data and machine learning. SOLUS100 is 100 m spatial resolution. Each 100 m raster cell represents a 100 m by 100 m square on the ground with soil property values estimated at seven depths: 0, 5, 15, 30, 60, 100, and 150 cm.

It provides estimates for soil organic carbon, bulk density, pH, texture fractions (clay, silt, sand), calcium carbonate equivalent, and depth to an anylithic contact (e.g. bedrock).

Each soil property is represented by a separate image in this collection. For each soil property except depth to anylithic contact, bands are provided for 7 depths: 0, 5, 15, 30, 60, 100, and 150cm. For each depth, 4 layers are provided: predicted value, lower 95% confidence limit, upper 95% confidence limit, and a relative property index. For depth to anylithic contact, a single image provides the 4 layers representing depth in cm.

Image IDs correspond to soil properties:

  • soc: Soil organic carbon (%)
  • bd: Bulk density (g/cm^3)
  • phh2o: pH in water
  • claytotal: Clay (%)
  • silttotal: Silt (%)
  • sandtotal: Sand (%)
  • caco3: Calcium Carbonate (%)
  • anylithicdpt: Depth to an Anylithic Contact (cm)

Bands

Bands

Pixel size: 100 meters (all bands)

Name Units Pixel Size Description
r_0_cm_p 100 meters

Predicted value of soil property at 0cm depth
r_0_cm_l 100 meters

Lower 95% confidence limit of soil property at 0cm depth
r_0_cm_h 100 meters

Upper 95% confidence limit of soil property at 0cm depth
r_0_cm_rpi 100 meters

Relative property index of soil property at 0cm depth
r_5_cm_p 100 meters

Predicted value of soil property at 5cm depth
r_5_cm_l 100 meters

Lower 95% confidence limit of soil property at 5cm depth
r_5_cm_h 100 meters

Upper 95% confidence limit of soil property at 5cm depth
r_5_cm_rpi 100 meters

Relative property index of soil property at 5cm depth
r_15_cm_p 100 meters

Predicted value of soil property at 15cm depth
r_15_cm_l 100 meters

Lower 95% confidence limit of soil property at 15cm depth
r_15_cm_h 100 meters

Upper 95% confidence limit of soil property at 15cm depth
r_15_cm_rpi 100 meters

Relative property index of soil property at 15cm depth
r_30_cm_p 100 meters

Predicted value of soil property at 30cm depth
r_30_cm_l 100 meters

Lower 95% confidence limit of soil property at 30cm depth
r_30_cm_h 100 meters

Upper 95% confidence limit of soil property at 30cm depth
r_30_cm_rpi 100 meters

Relative property index of soil property at 30cm depth
r_60_cm_p 100 meters

Predicted value of soil property at 60cm depth
r_60_cm_l 100 meters

Lower 95% confidence limit of soil property at 60cm depth
r_60_cm_h 100 meters

Upper 95% confidence limit of soil property at 60cm depth
r_60_cm_rpi 100 meters

Relative property index of soil property at 60cm depth
r_100_cm_p 100 meters

Predicted value of soil property at 100cm depth
r_100_cm_l 100 meters

Lower 95% confidence limit of soil property at 100cm depth
r_100_cm_h 100 meters

Upper 95% confidence limit of soil property at 100cm depth
r_100_cm_rpi 100 meters

Relative property index of soil property at 100cm depth
r_150_cm_p 100 meters

Predicted value of soil property at 150cm depth
r_150_cm_l 100 meters

Lower 95% confidence limit of soil property at 150cm depth
r_150_cm_h 100 meters

Upper 95% confidence limit of soil property at 150cm depth
r_150_cm_rpi 100 meters

Relative property index of soil property at 150cm depth
r_cm_p cm 100 meters

Predicted depth to anylithic contact in cm
r_cm_l cm 100 meters

Lower 95% confidence limit of depth to anylithic contact in cm
r_cm_h cm 100 meters

Upper 95% confidence limit of depth to anylithic contact in cm
r_cm_rpi 100 meters

Relative property index of depth to anylithic contact

Terms of Use

Terms of Use

The SOLUS dataset is in the public domain and is available without restriction on use or distribution.

Citations

Citations:

  • Nauman, T. W., Kienast-Brown, S., Roecker, S. M., Brungard, C., White, D., Philippe, J., & Thompson, J. A. (2024). Soil landscapes of the United States (SOLUS): developing predictive soil property maps of the conterminous United States using hybrid training sets. Soil Science Society of America Journal, 1-20. doi:10.1002/saj2.20769

DOIs

Explore with Earth Engine

Code Editor (JavaScript)

var soc = ee.Image('USDA/SOLUS100/V0/soc');
// NOTE: The following is equivalent:
// var soc = ee.ImageCollection('USDA/SOLUS100/V0')
//   .filter(ee.Filter.eq('system:index', 'soc'))
//   .first();
var soc_0_cm_p = soc.select('r_0_cm_p');

var visParams = {
  min: 0,
  max: 2000,
  palette: ['fff7bc', 'fee391', 'fec44f', 'fe9929', 'ec7014', 'cc4c02', '993404'],
};

Map.setCenter(-95, 38, 4);
Map.addLayer(soc_0_cm_p, visParams, 'Soil Organic Carbon 0-5cm');
Open in Code Editor
SOLUS (Soil Landscapes of the United States) is a national map product developed by the National Cooperative Soil Survey that is focused on providing a consistent set of spatially continuous soil property maps to support large scope soil investigations and land use decisions. SOLUS maps use a digital soil mapping …
USDA/SOLUS100/V0, soil,usda
2023-12-15T00:00:00Z/2024-01-01T00:00:00Z
24 -125 50 -66
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