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Tongass Landslide Areas (Feature Layer)

Metadata Updated: April 21, 2025

This is a once-over landslide inventory of the Tongass National Forest. This inventory includes all mass wasting features, including talus slopes, snow avalanche fields, and snow avalanche chutes. Each of these are coded differently in the attributes. It may be necessary to exclude several polygons in this data set when using it to determine landslide rates. Most of these landslide polygons were digitized on the 1998 to 2010 orthophotos in GIS. Many of them were age bracketed using air photos back to the 1929 Navy Trimegon photos. It includes both field and photo interpreted landslides. Not all of the landslides included once-over completed in FY2017 were age bracketed. There is an associated Points feature class (Tongass_Landslide_Initiation) that represents the landslide initiation zone approximations. These points only exist for true landslides: debris avalanches, debris torrents, combination debris avalanches/torrents, slumps, rotation failures, and rock fall-initiated failures.�Metadata

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 April 21, 2025

Metadata Source

Harvested from USDA JSON

Additional Metadata

Resource Type Dataset
Metadata Created Date November 3, 2022
Metadata Updated Date April 21, 2025
Publisher U.S. Forest Service
Maintainer
Identifier https://www.arcgis.com/home/item.html?id=112e05629a304613b4fda6057225d60d&sublayer=1
Data First Published 2019-09-16
Data Last Modified 2022-08-25
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 9a2e4532-923a-4eee-a70e-70cbe5d42e49
Harvest Source Id d3fafa34-0cb9-48f1-ab1d-5b5fdc783806
Harvest Source Title USDA JSON
Homepage URL https://data-usfs.hub.arcgis.com/datasets/usfs::tongass-landslide-areas-feature-layer
License https://creativecommons.org/licenses/by/4.0/
Metadata Type geospatial
Old Spatial -139.6362,54.6694,-130.0157,59.9924
Program Code 005:059
Progresscode onGoing
Source Datajson Identifier True
Source Hash 699244f0324e668c69afdde4e7e91e94bf3373238c79f38bbc254d42eb06ec1d
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -139.6362, 54.6694, -139.6362, 59.9924, -130.0157, 59.9924, -130.0157, 54.6694, -139.6362, 54.6694}

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