LiDAR Derived Forest Aboveground Biomass Maps, Northwestern USA, 2002-2016

This dataset provides maps of aboveground forest biomass (AGB) of living trees and standing dead trees in Mg/ha across portions of Northwestern United States, including Washington, Oregon, Idaho, and Montana, at a spatial resolution of 30 m. Forest inventory data were compiled from 29 stakeholders that had overlapping lidar imagery. The collection totaled 3805 field plots with lidar imagery for 176 collections acquired between 2002 and 2016. Plot-level AGB estimates were calculated from tree measurements using the default allometric equations found in the Fire Fuels Extension (FFE) of the Forest Vegetation Simulator (FVS). The random forest algorithm was used to model AGB from lidar height and density metrics that were generated from the lidar returns within fixed-radius field plot footprints, gridded climate metrics obtained from the Climate-FVS Ready Data Server, and topographic estimates extracted from Shuttle Radar Topography Mission (SRTM) 1 Arc-Second Global elevation rasters. AGB was then mapped from the same lidar metrics gridded across the extent of the lidar collections at 30-m resolution. The standard deviation of estimated AGB of the terminal nodes from the random forest predictions was also mapped to show pixel-level model uncertainty. Note that the AGB estimates are, for the most part, a single snapshot in time and that the forest conditions are not necessarily representative of the larger study area.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated April 21, 2026, 01:20 (UTC)
Created April 1, 2025, 17:02 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id 8471924e-687d-4941-b4dd-268015af2736
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1766
license https://www.usa.gov/government-works
modified 2026-04-13T22:16:01Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash fd377444d4f339e1735a695ad02e3ef82b6e80624dfeb698e96d036cb7108ceb
source_schema_version 1.1
spatial [[{"WestBoundingCoordinate":-125.581,"NorthBoundingCoordinate":49.353,"EastBoundingCoordinate":-112.275,"SouthBoundingCoordinate":41.6644}],"CARTESIAN"]
temporal 2002-01-01/2016-12-31
theme {"Earth Science"}