Tongass Landslide Areas

Name: Tongass Landslide Areas
Creator: US Forest Service
License: https://uscode.house.gov/view.xhtml?req=granuleid:USC-prelim-title17-section105&num=0&edition=prelim

Explore 20,272 source records for Tongass Landslide Areas. View the map or download the GeoJSON snapshot.

US Forest Service Prepared by Draw on a Map on 2026-10-09. All source fields retained. See the dataset notes for geometry repairs and reduced detail.

Inspect and select records

Choose values to filter the preview. Open or download the matching records.

Loading records from the map preview…

Open selected records

View record table

The table shows up to eight fields. The download keeps all fields and the original geometry.

About this dataset

Snapshot prepared on 2026-10-09. This is not a live service. The source update date can be earlier.
All 20,272 records in the reviewed snapshot are retained, with all source fields and record IDs. This layer is not a complete inventory of all places in the region.
Source coordinates use WGS84. Altitude and measure values are omitted.
1 source records have no geometry. They remain in the data table and download, but do not appear on the map. No locations were invented.
Geometry was simplified locally with a 0.0005 degree tolerance and topology preservation. Records that could not be simplified to valid geometry retain their repaired geometry.
This map is for overview use. Do not use it for precise boundary measurement.
Original source metadata and reuse evidence: https://drawonamap.com/library/sources/government-2026-10/tongass-landslide-areas-f5e60acd.json
The dataset has 3 download files. Open map loads all parts together. Keep all parts for a complete copy.

Source and licence

US Forest Service

Licence: Public domain (US government work)

GeoJSON download details

The downloads include all 20,272 features as area groups, areas. Coordinates use longitude and latitude in WGS84.

The preparation date is when we prepared this dataset. Read the source notes for the dates covered by the data.

GeoJSON fields 26

objectid: OBJECTID. Source field from US Forest Service.
tnf_ls_no: TNF_LS_NO. Source field from US Forest Service.
inventory: INVENTORY. Source field from US Forest Service.
latest_date_not_seen: LATEST_DATE_NOT_SEEN. Source field from US Forest Service.
not_seen_source: NOT_SEEN_SOURCE. Source field from US Forest Service.
first_date_seen: FIRST_DATE_SEEN. Source field from US Forest Service.
seen_source: SEEN_SOURCE. Source field from US Forest Service.
confid_dat: CONFID_DAT. Source field from US Forest Service.
estim_year: ESTIM_YEAR. Source field from US Forest Service.
treatment: TREATMENT. Source field from US Forest Service.
rd_initiated: RD_INITIATED. Source field from US Forest Service.
fail_type: FAIL_TYPE. Source field from US Forest Service.
examiner: EXAMINER. Source field from US Forest Service.
slope_per: SLOPE_PER. Source field from US Forest Service.
slope_sha: SLOPE_SHA. Source field from US Forest Service.
bdrk_f_zon: BDRK_F_ZON. Source field from US Forest Service.
pm_f_zone: PM_F_ZONE. Source field from US Forest Service.
landslide_name: LANDSLIDE_NAME. Source field from US Forest Service.
landwehr_n: LANDWEHR_N. Source field from US Forest Service.
grouped_sl: GROUPED_SL. Source field from US Forest Service.
recurrence: RECURRENCE. Source field from US Forest Service.
acres: ACRES. Source field from US Forest Service.
globalid: globalid. Source field from US Forest Service.
st_area(shape): st_area(shape). Source field from US Forest Service.
st_perimeter(shape): st_perimeter(shape). Source field from US Forest Service.
shape: SHAPE. Source field from US Forest Service.