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USGS ARDF · Data sources · STRATA

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usgs_ardfcommodityOfficial surveyAuthoritative

USGS ARDF

USGS

~7,400 Alaska metallic & industrial mineral occurrences/prospects/mines

Source

How it's published

Feed (what to expect)

Static 2005 shapefile (free direct download); live-fetched but no upstream updates.

Cadence: static (2005 vintage; ~2012 build stamp in .dbf)
Access: free direct download from mrdata.usgs.gov
Format: ESRI shapefile (ZIP bundle, parsed .dbf only)
Licence: public_domain
Vintage: 2005
Upstream: https://mrdata.usgs.gov/ardf/

Quirks

Bundle contains .shp/.shx/.prj/.met; parser uses .dbf only (coords in columns)
No .cpg file; UTF-8 encoding (not dBASE latin1) required for text fields

Extends DepositOccurrence coverage for Alaska (most critical-mineral-prospective

Reconciliation

Role in the canonical graph

Authority tier: Official survey
Provenance: Authoritative
Canonicality: tier 1
Primary for: —
Contributes IDs: —
Name-block matching: trusted
Reconcile profile: default (tier 1)

Schema

What it feeds & emits

Feeds (axes)

Supply

Record kinds

DepositOccurrence

Identifier schemes

—

Federated from primary sources. Every fact carries its provenance.

USGS·MSHA·EPA FRS·Wikidata·CEPII BACI·IEA CMO·NREL·BGS·GCAM·HECTOR·PROMMIS

Strata is a product of

© 2026 BrightQuery, Inc. All rights reserved.