iSDAsoil Depth to Bedrock

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ISDASOIL/Africa/v1/bedrock_depth
Dataset Availability
2001-01-01T00:00:00Z–2017-01-01T00:00:00
Dataset Provider
Earth Engine Snippet
ee.Image("ISDASOIL/Africa/v1/bedrock_depth")
Tags
africa bedrock isda soil

Description

Depth to bedrock at 0-200 cm depth, predicted mean and standard deviation.

Due to the potential cropland mask that was used for generating the data, many areas of exposed rock (where depth to bedrock would be 0 cm) have been masked out and therefore appear as nodata values. The maximum depth of this layer is 200 cm, but this does not represent the maximum possible soil depth, therefore values of 200 should be interpreted as >= 200.

In areas of dense jungle (generally over central Africa), model accuracy is low and therefore artefacts such as banding (striping) might be seen.

Soil property predictions were made by Innovative Solutions for Decision Agriculture Ltd. (iSDA) at 30 m pixel size using machine learning coupled with remote sensing data and a training set of over 100,000 analyzed soil samples.

Further information can be found in the FAQ and technical information documentation. To submit an issue or request support, please visit the iSDAsoil site.

Bands

Resolution
30 meters

Bands

Name Units Min Max Description
mean_0_200 cm 27 200

Depth to bedrock, predicted mean at 0-200 cm depth

stdev_0_200 cm 9 254

Depth to bedrock, standard deviation at 0-20 cm depth

Terms of Use

Terms of Use

CC-BY-4.0

Citations

Citations:
  • Hengl, T., Miller, M.A.E., Križan, J., et al. African soil properties and nutrients mapped at 30 m spatial resolution using two-scale ensemble machine learning. Sci Rep 11, 6130 (2021). doi:10.1038/s41598-021-85639-y

Explore in Earth Engine

var mean_0_200 =
'<RasterSymbolizer>' +
 '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#00204D" label="0-13" opacity="1" quantity="13"/>' +
  '<ColorMapEntry color="#002D6C" label="13-26" opacity="1" quantity="26"/>' +
  '<ColorMapEntry color="#16396D" label="26-39" opacity="1" quantity="39"/>' +
  '<ColorMapEntry color="#36476B" label="39-52" opacity="1" quantity="52"/>' +
  '<ColorMapEntry color="#4B546C" label="52-65" opacity="1" quantity="65"/>' +
  '<ColorMapEntry color="#5C616E" label="65-78" opacity="1" quantity="78"/>' +
  '<ColorMapEntry color="#6C6E72" label="78-91" opacity="1" quantity="91"/>' +
  '<ColorMapEntry color="#7C7B78" label="91-104" opacity="1" quantity="104"/>' +
  '<ColorMapEntry color="#8E8A79" label="104-117" opacity="1" quantity="117"/>' +
  '<ColorMapEntry color="#A09877" label="117-130" opacity="1" quantity="130"/>' +
  '<ColorMapEntry color="#B3A772" label="130-143" opacity="1" quantity="143"/>' +
  '<ColorMapEntry color="#C6B66B" label="143-156" opacity="1" quantity="156"/>' +
  '<ColorMapEntry color="#DBC761" label="156-169" opacity="1" quantity="169"/>' +
  '<ColorMapEntry color="#F0D852" label="169-182" opacity="1" quantity="182"/>' +
  '<ColorMapEntry color="#FFEA46" label="182-200" opacity="1" quantity="195"/>' +
 '</ColorMap>' +
 '<ContrastEnhancement/>' +
'</RasterSymbolizer>';

var stdev_0_200 =
'<RasterSymbolizer>' +
 '<ColorMap type="ramp">' +
  '<ColorMapEntry color="#fde725" label="low" opacity="1" quantity="14"/>' +
  '<ColorMapEntry color="#5dc962" label=" " opacity="1" quantity="18"/>' +
  '<ColorMapEntry color="#20908d" label=" " opacity="1" quantity="21"/>' +
  '<ColorMapEntry color="#3a528b" label=" " opacity="1" quantity="22"/>' +
  '<ColorMapEntry color="#440154" label="high" opacity="1" quantity="25"/>' +
 '</ColorMap>' +
 '<ContrastEnhancement/>' +
'</RasterSymbolizer>';

var raw = ee.Image("ISDASOIL/Africa/v1/bedrock_depth");
Map.addLayer(
    raw.select(0).sldStyle(mean_0_200), {},
    "Bedrock depth, mean visualization, 0-200 cm");
Map.addLayer(
    raw.select(1).sldStyle(stdev_0_200), {},
    "Bedrock depth, stdev visualization, 0-200 cm");

var visualization = {min: 27, max: 200};

Map.setCenter(25, -3, 2);

Map.addLayer(raw.select(0), visualization, "Bedrock depth, mean, 0-200 cm");