Product Details
The Disturbance and Treatment Polygons (Events) is a collection of natural disturbance and land management activities used to determine disturbance causality in LF products and can be used in change detection analysis. Disturbance and Treatment Polygons (Events) Geodatabase contains over 2.9 million polygons from 1999-2024 across the United States and U.S. territories.
The Disturbance and Treatment Polygons (Events) includes contributions from:
- Federal
- State
- Local
- Private Organizations
Disturbance and Treatment Polygons (Events) include a feature dataset for Alaska (AK), CONUS, Hawaii (HI), and the island territories of Federated States of Micronesia (FSM), Guam/Northern Mariana (GUCNMI), Palau (PW), and Puerto Rico/U.S. Virgin Islands (PRVI).
Each feature dataset contains two feature classes, namely Raw DTP and Model Ready DTP. The Raw and Model Ready DTP feature classes include disturbance and vegetation/fuel treatment data.
In addition to the feature classes there is also a look up table for the source code, which is an attribute in all feature classes. The source code is a LANDFIRE internal code assigned to each data source. Please consult the Look Up Table link for more information about the data sources included and excluded from this release.
Look Up Table
Download
Certain proprietary and/or sensitive data were removed in this public geodatabase. The lutSource_Code is a table which is an attribute in all feature classes. Consult the table "lutSource_Code" for more information about the data sources.
The data in the Raw DTP feature class have been analyzed to eliminate geospatial or information content errors but otherwise represent the full account of acceptable data processed for LANDFIRE. These data may include multiple perimeters for the same disturbance/treatment and a high degree of overlap between disturbances and treatments within a single calendar year or fiscal year. Examples of the former include the same management activity or disturbance reported by multiple agencies or individuals. Examples of the latter include locations in which multiple management activities and/or disturbances occurred within the same calendar year or fiscal year.
The data in the Raw DTP feature class have been analyzed to eliminate geospatial or information content errors but otherwise represent the full account of acceptable data processed for LANDFIRE. These data may include multiple perimeters for the same disturbance/treatment and a high degree of overlap between disturbances and treatments within a single calendar year or fiscal year. Examples of the former include the same management activity or disturbance reported by multiple agencies or individuals. Examples of the latter include locations in which multiple management activities and/or disturbances occurred within the same calendar year or fiscal year.
The Model Ready DTP feature class has been reduced to only one unique disturbance or treatment per calendar year per location for data from 1999-2020 and one unique disturbance or treatment per fiscal year per location for data from 2021-2025. To produce the Model Ready layer, a series of topologies were created with the Raw DTP data to identify areas of overlap between polygons within the same calendar or fiscal year.
A standard hierarchy of LANDFIRE event types was applied to correct the topology errors. For more specifics on the rankings download the LANDFIRE_Disturbance_Treatment_Polygons_README.pdf and review Appendix B.
Appendix B
LANDFIRE Disturbance and Treatment Type Nomenclature and Hierarchy
Disturbance and Treatment Types or Event Types at the top of this list are highest ranked thus having the greatest impact on vegetation/fuel composition
Hierarchy for data from 1999-2023
| LANDFIRE Disturbance and Treatment Type |
|---|
| Development |
| Clearcut |
| Harvest |
| Thinning |
| Mastication |
| Other Mechanical |
| Wildfire |
| Wildland Fire Use |
| Prescribed Fire |
| Wildland Fire |
| Weather |
| Insecticide |
| Chemical |
| Insects |
| Disease |
| Insects/Disease |
| Herbicide |
| Biological |
| Planting |
| Reforestation |
| Seeding |
Hierarchy for data from 2024
| LANDFIRE Disturbance and Treatment Type |
|---|
| Development |
| Clearcut |
| Harvest |
| Thinning |
| Mastication |
| Mechanical Add |
| Mechanical Remove |
| Mechanical Unknown |
| Wildfire |
| Wildland Fire Use |
| Prescribed Fire |
| Weather |
| Insecticide |
| Chemical |
| Insects |
| Disease |
| Insects/Disease |
| Herbicide |
| Biological |
| Planting |
| Reforestation |
| Seeding |
A selected perimeter may not necessarily be from a public data set so the Model Ready DTP feature class may be missing information on disturbances and treatments that appear in the Raw DTP feature class. The result is a layer which contains only one disturbance or treatment per calendar year for a location for data from 1999-2020. Data from 2021-2024 contains only one disturbance or treatment per fiscal year for a location. Point derived polygons and polygons that were <0.02 acres are also removed from the Model Ready DTP.
The Model Ready DTP feature class has been reduced to only one unique disturbance or treatment per calendar year per location for data from 1999-2020 and one unique disturbance or treatment per fiscal year per location for data from 2021-2025. To produce the Model Ready layer, a series of topologies were created with the Raw DTP data to identify areas of overlap between polygons within the same calendar or fiscal year.
A standard hierarchy of LANDFIRE event types was applied to correct the topology errors. For more specifics on the rankings download the LANDFIRE_Disturbance_Treatment_Polygons_README.pdf and review Appendix B.
Appendix B
LANDFIRE Disturbance and Treatment Type Nomenclature and Hierarchy
Disturbance and Treatment Types or Event Types at the top of this list are highest ranked thus having the greatest impact on vegetation/fuel composition
Hierarchy for data from 1999-2023
| LANDFIRE Disturbance and Treatment Type |
|---|
| Development |
| Clearcut |
| Harvest |
| Thinning |
| Mastication |
| Other Mechanical |
| Wildfire |
| Wildland Fire Use |
| Prescribed Fire |
| Wildland Fire |
| Weather |
| Insecticide |
| Chemical |
| Insects |
| Disease |
| Insects/Disease |
| Herbicide |
| Biological |
| Planting |
| Reforestation |
| Seeding |
Hierarchy for data from 2024
| LANDFIRE Disturbance and Treatment Type |
|---|
| Development |
| Clearcut |
| Harvest |
| Thinning |
| Mastication |
| Mechanical Add |
| Mechanical Remove |
| Mechanical Unknown |
| Wildfire |
| Wildland Fire Use |
| Prescribed Fire |
| Weather |
| Insecticide |
| Chemical |
| Insects |
| Disease |
| Insects/Disease |
| Herbicide |
| Biological |
| Planting |
| Reforestation |
| Seeding |
A selected perimeter may not necessarily be from a public data set so the Model Ready DTP feature class may be missing information on disturbances and treatments that appear in the Raw DTP feature class. The result is a layer which contains only one disturbance or treatment per calendar year for a location for data from 1999-2020. Data from 2021-2024 contains only one disturbance or treatment per fiscal year for a location. Point derived polygons and polygons that were <0.02 acres are also removed from the Model Ready DTP.
Improvements
LANDFIRE is no longer producing the exotics polygon layer, and it is no longer included in the Disturbance and Treatment Polygons (Events) geodatabase. You can still access the LF 2023 Exotics polygon data which includes Exotics data from 1999-2023 on the LF Map Viewer.
Beginning with the LF 2022 Update, LANDFIRE started re-collecting disturbance and treatment polygons June 1 each year from online National data sources. These sources include Forest Service Activity Tracking System (FACTS), National Interagency Fire Center (NIFC), USFS National Insect and Disease Risk Map (NIDRM), and Interior Fuels and Post-Fire Reporting System (IFPRS). Updated data is pulled from these sources and any new treatments or disturbances are added. For LF 2022, LANDFIRE added 6.5 million acres of disturbance and treatment polygons to the LF Raw DTP product upon re-collection. For a grand total of ~28 million acres of Raw DTP data featured within the LF 2022 Update.
Disturbance Data Processing - learn how LF evaluates and processes the Disturbance and Treatment Polygons (Events)
Disturbance Data Processing - learn how LF evaluates and processes the Disturbance and Treatment Polygons (Events)
Brenda Lundberg
LANDFIRE Reference Data Administrator
blundberg@contractor.usgs.gov
Brenda Lundberg
LANDFIRE Reference Data Administrator
blundberg@contractor.usgs.gov