Sources & Licenses
| Source | Use, license |
|---|---|
| OpenStreetMap | 46 listings (hand-reviewed visitor sites). Data © OpenStreetMap contributors, available under the Open Database License (ODbL) 1.0. Extracts via Geofabrik. |
| RIDB / Recreation.gov | 18 listings: federal recreation areas and facilities with "Gold panning" or "Rockhounding" listed as an activity, from the Recreation Information Database bulk export. U.S. government data, public domain. |
| Bureau of Land Management | 9 designated rockhounding areas from blm.gov. U.S. government work, public domain. |
| Official websites | 10 listings added from the operators' own websites (address, what you can dig, and hours/fees only where the site states them). Each listing links its source page and the date checked. |
| Photos | Public-domain and Creative Commons photos from Wikimedia Commons. See Image credits. |
| U.S. Census Bureau | 2023 cartographic boundary files for city and county names. Public domain. |
Duplicates between sources (same site within 1.5 km sharing a name word) are merged, preferring BLM, then RIDB, then OSM. Listings that were not dig sites (cabins, byways, wilderness study areas, a softball field) were removed by hand. Last refresh 2026-11-04.