NACP North American Forest Dynamics Project: Forest Disturbance and Regrowth Data

This data set provides the results of time-series analyses of Landsat imagery for 55 selected forested sites across the conterminous U.S.A. The output is a pair of disturbance data products for each site, one showing the first year of disturbance in the time series, the other showing the last year of disturbance. Each data pixel is labeled as either a static land class (persistent non-forest, persistent forest, or persistent water) or with the year of change for disturbed forest pixels. The time period analyzed is approximately 1984-2009.

These forest disturbance data are distributed as a single band GeoTiff, with appropriate projection information defined within the file. The analyses were performed in three phases: 5 sites during the Prototype/Focal phase; 23 sites in Phase I; and 27 sites in Phase II. The spatial resolution of the Prototype/Focal and Phase I data is 28.5 meters. The spatial resolution of the Phase II data is 30 meters. The temporal resolution is nominally biennial. The mapped area for each forested site is approximately 185 km x 185 km. There are a total of 110 GeoTiff files â?? a first year and a last year of disturbance file for each of the 55 sites.

Data and Resources

Additional Info

Field Value
Maintainer Earthdata Forum
Last Updated August 10, 2026, 19:53 (UTC)
Created April 1, 2025, 17:54 (UTC)
accessLevel public
bureauCode {026:00}
catalog_conformsTo https://project-open-data.cio.gov/v1.1/schema
harvest_object_id f8788a41-2911-461e-ba81-04cddfa570a6
harvest_source_id b99e41c6-fe79-4c19-bbc3-9b6c8111bfac
harvest_source_title Science Discovery Engine
identifier 10.3334/ORNLDAAC/1077
license https://www.usa.gov/government-works
modified 2026-08-03T22:16:01Z
programCode {026:000}
publisher ORNL_DAAC
resource-type Dataset
source_datajson_identifier true
source_hash 459b168d535e9b60b0f7483961104fd5a4278beabfb0d9c1aed120907ba1ffb1
source_schema_version 1.1
spatial ["CARTESIAN", [{"WestBoundingCoordinate": -126.458, "NorthBoundingCoordinate": 49.7924, "EastBoundingCoordinate": -67.9596, "SouthBoundingCoordinate": 26.5202}]]
temporal 1984-06-04/2009-09-16
theme {"Earth Science"}