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Rapid Assessment of Vegetation Condition: Perimeters - PostfireVegChg ByForest (Feature Layer)

Metadata Updated: November 2, 2024

The USDA Forest Service Rapid Assessment of Vegetation Condition after Wildfire (RAVG) program produces geospatial and related data representing post-fire vegetation condition by means of standardized change detection methods based on Landsat or similar multispectral satellite imagery. RAVG data products characterize the impact of disturbance (fire) on vegetation within a fire perimeter, and include estimates of percent change in live basal area (BA), percent change in canopy cover (CC), and the standardized composite burn index (CBI). Standard thematic products include 7-class percent change in basal area (BA-7), 5-class percent change in canopy cover (CC-5), and 4-class CBI (CBI-4). Contingent upon the availability of suitable imagery, RAVG products are prepared for all wildland fires reported within the conterminous United States (CONUS) that include at least 1000 acres of forested National Forest System (NFS) land (500 acres for Regions 8 and 9 as of 2016). Data for individual fires are typically made available within 45 days after fire containment ("initial assessments"). Late-season fires, however, may be deferred until the following spring or summer ("extended assessments"). Annual national mosaics of each thematic product are prepared at the end of the fire season and updated, as needed, when additional fires from the given year are processed. The annual mosaics are available via the Raster Data Warehouse (RDW, see https://apps.fs.usda.gov/arcx/rest/services/RDW_Wildfire). A combined perimeter dataset, including the burn boundaries for all published Forest Service RAVG fires from 2012 to the present, is likewise updated as needed (at least annually). This current dataset is derived from the combined perimeter dataset and adds spatial information about land ownership (National Forest) and wilderness status, as well as the areal extent of forested land (pre-fire) that experience a modeled BA loss above 50 and 75 percent.

Access & Use Information

Public: This dataset is intended for public access and use. License: Creative Commons Attribution

Downloads & Resources

Dates

Metadata Created Date September 21, 2023
Metadata Updated Date November 2, 2024

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date September 21, 2023
Metadata Updated Date November 2, 2024
Publisher U.S. Forest Service
Maintainer
Identifier https://www.arcgis.com/home/item.html?id=b42dd430556348da8e1c3819b8142275&sublayer=1
Data First Published 2023-08-24
Data Last Modified 2024-05-31
Category geospatial
Public Access Level public
Bureau Code 005:96
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 008a57ee-2d5b-4da0-b68f-50446c9a5e81
Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
Harvest Source Title USDA JSON
Homepage URL https://data-usfs.hub.arcgis.com/datasets/usfs::rapid-assessment-of-vegetation-condition-perimeters-postfirevegchg-byforest-feature-layer
License https://creativecommons.org/licenses/by/4.0/
Metadata Type geospatial
Old Spatial -150.5292,29.0484,-76.9730,60.7294
Program Code 005:059
Source Datajson Identifier True
Source Hash 82d121a925af306b9e305113ed0f65c8c90f833cfe61ba6c95439386d8e595a6
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -150.5292, 29.0484, -150.5292, 60.7294, -76.9730, 60.7294, -76.9730, 29.0484, -150.5292, 29.0484}

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