This is a higher-resolution data product that expands on the methodology presented in Baccini et al. (2012) to generate a pantropical map of aboveground live woody biomass density at 30-meter resolution for the year 2000. Along with the biomass density values, there is an error map available for download at the same spatial resolution providing the uncertainty in aboveground biomass density estimation. The statistical relationship derived between ground-based measurements of forest biomass density and colocated Geoscience Laser Altimeter System (GLAS) LiDAR waveform metrics as described by Baccini et al. (2012) were used to estimate the biomass density of more than 40,000 GLAS footprints throughout the tropics. Then, using randomForest models, the GLAS-derived estimates of biomass density were correlated to continuous, gridded variables including Landsat 7 ETM+ satellite imagery and products (e.g., reflectance), elevation, and biophysical variables. By using continuous gridded data sets as inputs to the randomForest models, a wall-to-wall 30-meter resolution map of aboveground woody biomass density across the tropics was produced as well as the associated uncertainty layer. The uncertainty layer takes into account the errors from allometric equations, the LiDAR based model, and the randomForest model. All the errors are propagated to the final biomass estimate. Biomass density values are shown on the map; carbon density values can be estimated as 50 percent of biomass density values. On GFW Climate, a user can adjust the minimum tree canopy density threshold for what defines a forest at a value between 10 and 30 percent, and biomass density estimates will update accordingly to reflect the new forest definition.

Dataset Attributes

  • objectid
  • name
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  • download
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  • confidence
    {"value"=>" ", "count"=>5} (), {"value"=>"", "count"=>2} (), {"value"=>"", "count"=>2} (), {"value"=>"", "count"=>2} (), {"value"=>"", "count"=>2} (), {"value"=>"", "count"=>1} (), {"value"=>"", "count"=>1} (), {"value"=>"", "count"=>1} (), {"value"=>"", "count"=>1} (), {"value"=>"", "count"=>1} ()
  • shape
  • globalid
  • shape_Length
  • shape_Area


  • By on January 26, 2016
  • Updated 12 days ago

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