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Rapid Assessment of Vegetation Condition after Wildfire (RAVG) Basal Area Percent Change (Alaska) (Map Service)

Metadata Updated: June 21, 2023

The USDA Forest Service Rapid Assessment of Vegetation Condition after Wildfire (RAVG) program produces geospatial data and maps of post-fire vegetation condition using standardized change detection methods based on Landsat or similar multispectral satellite imagery. RAVG data products characterize vegetation condition within a fire perimeter, and include estimates of percent change in basal area (BA), percent change in canopy cover (CC), and a 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'). National mosaics of each thematic product are prepared annually. Mosaics of extended assessments, if any, are provided separately from initial assessment mosaics. This map service includes annual raster mosaics of published BA-7 datasets for fires that burned during calendar years 2019 in Alaska. The associated burned area perimeters are available via the Enterprise Data Warehouse.

Access & Use Information

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

Downloads & Resources

Dates

Metadata Created Date November 3, 2022
Metadata Updated Date June 21, 2023

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date November 3, 2022
Metadata Updated Date June 21, 2023
Publisher U.S. Forest Service
Maintainer
Identifier https://www.arcgis.com/home/item.html?id=096329b5b2cd447090cc94dccaa5355d
Data First Published 2022-01-04
Data Last Modified 2022-08-29
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 c53ea031-3904-4a45-8ef1-a6c9f10a394e
Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
Harvest Source Title USDA JSON
Homepage URL https://data-usfs.hub.arcgis.com/documents/usfs::rapid-assessment-of-vegetation-condition-after-wildfire-ravg-basal-area-percent-change-alaska-map-service
License https://creativecommons.org/licenses/by/4.0/
Metadata Type geospatial
Old Spatial -172.3190,53.2612,-128.0403,65.8592
Program Code 005:059
Source Datajson Identifier True
Source Hash 0a7e412de82a4137f6366060492e74e366ad2c7b
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -172.3190, 53.2612, -172.3190, 65.8592, -128.0403, 65.8592, -128.0403, 53.2612, -172.3190, 53.2612}

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