Data sources
99 US layers
Every layer on Bottomless Maps comes from a public agency or an open dataset. Each one is credited on the map while it's on (the ⓘ button at the bottom right). This page lists them all: who publishes the data, its license, where to get it, and how often the source itself changes. See the Terms for what the licenses mean if you reuse the data, and the layer pages for what's in each layer.
Camping
| Layer | Source | License | Data | Source updates |
|---|---|---|---|---|
| Army Corps Recreation Sites | U.S. Army Corps of Engineers | Public domain (U.S. Government) | geospatial.sec.usace.army.mil | — |
| Backcountry Sites & Shelters | NPS Points of Interest + BLM Recreation Sites + USFS Recreation Sites | Public domain (U.S. Government) | public-nps.opendata.arcgis.com | Continuous |
| BLM Campgrounds | Bureau of Land Management: National Recreation Sites | Public domain (U.S. Government) | gbp-blm-egis.hub.arcgis.com | — |
| Dispersed Camping | BLM National Recreation Sites + USDA Forest Service Recreation Sites | Public domain (U.S. Government) | data.fs.usda.gov | — |
| NPS Campgrounds | National Park Service: Points of Interest | Public domain (U.S. Government) | public-nps.opendata.arcgis.com | — |
| Overnight Parking (call ahead – unverified) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Recreation.gov Campgrounds | Recreation.gov | Public domain (U.S. Government) | ridb.recreation.gov | Daily |
| RV Parks (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| USFS Campgrounds | USDA Forest Service: Recreation Opportunities | Public domain (U.S. Government) | data.fs.usda.gov | — |
Facilities & Water
| Layer | Source | License | Data | Source updates |
|---|---|---|---|---|
| Bike Repair Stations (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Boat Ramps (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Defibrillators (AED, OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Drinking Water & Springs | NPS Points of Interest + BLM Recreation Sites + USFS Recreation Sites | Public domain (U.S. Government) | data.fs.usda.gov | — |
| Free Wi-Fi (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Laundromats (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| NOAA Tide Stations | NOAA Tides & Currents | Public domain (U.S. Government) | tidesandcurrents.noaa.gov | Rare |
| Propane (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Ranger Stations & Visitor Centers | NPS Points of Interest + BLM Recreation Sites + USFS Offices / Recreation Sites | Public domain (U.S. Government) | data.fs.usda.gov | Ongoing |
| Rest Areas (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| RV Dump Stations (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Showers (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| SNOTEL Snow Stations | USDA NRCS SNOTEL | Public domain (U.S. Government) | nrcs.usda.gov | Rare (station list) |
| Tire Air (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Toilets (public lands) | NPS Points of Interest + BLM Recreation Sites + USFS Recreation Sites | Public domain (U.S. Government) | data.fs.usda.gov | — |
| USFS Recreation Opportunities | USDA Forest Service: Recreation Opportunities | Public domain (U.S. Government) | data.fs.usda.gov | Ongoing |
| USGS Stream Gauges | USGS Water Services | Public domain (U.S. Government) | waterservices.usgs.gov | Ongoing |
Land & Boundaries
| Layer | Source | License | Data | Source updates |
|---|---|---|---|---|
| BLM Areas of Critical Environmental Concern | BLM National ACEC | Public domain (U.S. Government) | gbp-blm-egis.hub.arcgis.com | Periodic |
| BLM National Monuments & Conservation Areas | BLM National Landscape Conservation System | Public domain (U.S. Government) | gbp-blm-egis.hub.arcgis.com | Rare |
| Former Military Site Boundaries (FUDS) | USACE Formerly Used Defense Sites (FY2024) | Public domain (U.S. Government) | usace.army.mil | Yearly (FY) |
| Former Military Sites (FUDS) | USACE Formerly Used Defense Sites (FY2024) | Public domain (U.S. Government) | usace.army.mil | Yearly (FY) |
| FUDS Munitions Response Sites | USACE Formerly Used Defense Sites — MRS | Public domain (U.S. Government) | usace.army.mil | Yearly (FY) |
| Land & Water Conservation Fund Parcels | USDA Forest Service: LWCF Parcels | Public domain (U.S. Government) | data.fs.usda.gov | Periodic |
| Land Ownership (SMA) | BLM National Surface Management Agency | Public domain (U.S. Government) | catalog.data.gov | — |
| National Heritage Areas | National Park Service: National Heritage Areas | Public domain (U.S. Government) | nps.gov | Rare |
| National Park Service Sites | National Park Service | Public domain (U.S. Government) | services1.arcgis.com | Ongoing (edits Oct 2026) |
| Peaks & Passes (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| PLSS Townships | BLM: Public Land Survey System | Public domain (U.S. Government) | gbp-blm-egis.hub.arcgis.com | Periodic |
| USFS Roadless Areas | USDA Forest Service: Inventoried Roadless Areas | Public domain (U.S. Government) | data.fs.usda.gov | Rare |
| USFS Special Interest Areas | USDA Forest Service: Special Interest Management Areas | Public domain (U.S. Government) | data.fs.usda.gov | Periodic |
| Wilderness Areas | Wilderness Connect (wilderness.net) | Public domain (U.S. Government) | wilderness.net | Rare (new designations) |
Trails & Roads
| Layer | Source | License | Data | Source updates |
|---|---|---|---|---|
| Abandoned & Railbanked Rail Lines (STB) | Surface Transportation Board | U.S. Government public information | stb.gov | Irregular (filings) |
| Amtrak Stations | BTS National Transportation Atlas Database | Public domain (U.S. Government) | bts.gov | Seasonal NTAD drops |
| Forest Service Trails | USDA Forest Service: National Forest System Trails | Public domain (U.S. Government) | data.fs.usda.gov | ~Monthly |
| Motor Vehicle Use Map (MVUM) | USDA Forest Service: Motor Vehicle Use Maps | Public domain (U.S. Government) | data.fs.usda.gov | As forests publish new MVUMs (~yearly) |
| National Park Roads | National Park Service: Public Roads | Public domain (U.S. Government) | public-nps.opendata.arcgis.com | Ongoing |
| National Park Trails | National Park Service: Public Trails | Public domain (U.S. Government) | public-nps.opendata.arcgis.com | Ongoing |
| National Scenic & Historic Trails | National Park Service and partner agencies | Public domain (U.S. Government) | nps.gov | Rare (annual at most) |
| Scenic Byways | FHWA America's Byways | Public domain (U.S. Government work, 17 U.S.C. §105) | geo.dot.gov | Infrequent (designation list last updated 2021-01-21) |
| Snowmobile Trails (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| USFS Trailheads | USDA Forest Service: Recreation Sites | Public domain (U.S. Government) | data.fs.usda.gov | Continuous |
Curiosities
| Layer | Source | License | Data | Source updates |
|---|---|---|---|---|
| Boundary Stones & Survey Marks (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Cave Entrances (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Covered Bridges | Wikidata (CC0) | CC0 | wikidata.org | Irregular |
| Drive-in Theaters | Wikidata (CC0) | CC0 | wikidata.org | Irregular (continuous edits) |
| Filming Locations (US) | Wikidata (CC0) | CC0 | wikidata.org | Continuous |
| Fire Lookout Towers (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Florida Sinkhole Reports | Florida Geological Survey (FGS) | Florida open data; credit FGS | geodata.floridagio.gov | Irregular (as reports arrive) |
| Forts (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Fossil Collections (PBDB) | Paleobiology Database (CC BY 4.0) | CC BY 4.0 | paleobiodb.org | Continuous |
| Funny Place Names | USGS GNIS Domestic Names | Public domain (U.S. Government) | usgs.gov | GNIS file refreshed periodically (zip modified 2026-09-29) |
| Geoglyphs & Hillside Letters (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Ghost Towns (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Historic Lighthouses | NOAA Historic Lighthouses | Public domain (U.S. Government) | noaa.gov | Effectively static |
| Hot Springs (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| International Dark Sky Places | Spinner et al. 2024, GFZ Data Services (CC BY 4.0) | CC BY 4.0 | doi.org | Static snapshot (June 2024) |
| Little Free Libraries & Book Boxes (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Meteorite Landings | NASA Meteorite Landings (Meteoritical Society) — license not specified | License not specified | data.nasa.gov | Static |
| Notable Trees (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Nuclear Test Sites (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Observatories | Wikidata (CC0) | CC0 | wikidata.org | Irregular |
| Planes, Trains & Tanks on Display (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Public Art (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Ruins & Abandoned Places (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Shipwrecks & Obstructions | HIFLD Wrecks and Obstructions (CC0) | CC0 | hifld-geoplatform.opendata.arcgis.com | — |
| Stories Set Here | Wikidata (CC0) | CC0 | wikidata.org | Continuous |
| Waterfalls (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Windmills & Watermills (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
Other
| Layer | Source | License | Data | Source updates |
|---|---|---|---|---|
| Airports & Airstrips (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Ballparks | GeoJSON-Ballparks by cageyjames (ODC-BY 1.0) | ODC-BY 1.0 | github.com | — |
| Beaches (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Breweries | Open Brewery DB (MIT) | MIT | openbrewerydb.org | Irregular (community PRs) |
| Climbing Areas (OpenBeta) | OpenBeta (CC0) | CC0 | openbeta.io | Continuous |
| Climbing Routes (OpenBeta) | OpenBeta (CC0) | CC0 | openbeta.io | Continuous (release builds) |
| Disc Golf Courses (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Dog Parks (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Fishing Spots (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Hotels, Motels & Hostels (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Mines & Prospects (MRDS) | USGS Mineral Resources Data System | Public domain (U.S. Government) | mrdata.usgs.gov | Frozen (~2011) |
| Museums (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Oil & Gas Wells (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Pickleball (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Picnic Sites (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Skateparks (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Ski Areas (OpenSkiData) | OpenSkiData (ODbL; © OpenStreetMap contributors, Skimap.org) | ODbL 1.0 | openskimap.org | Continuous |
| Swim Spots (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Viewpoints | NPS Points of Interest + BLM Recreation Sites + USFS Recreation Sites | Public domain (U.S. Government) | public-nps.opendata.arcgis.com | — |
| Wild & Scenic Rivers | USDA Forest Service: Wild & Scenic Rivers | Public domain (U.S. Government) | data.fs.usda.gov | Rare |
| Wineries & Distilleries (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
| Zoos & Aquariums (OSM) | © OpenStreetMap contributors (ODbL 1.0) | ODbL 1.0 | openstreetmap.org | Continuous |
Base maps and services
- Base maps: OpenFreeMap (OpenStreetMap data, ODbL), OpenTopoMap (CC BY-SA), and Esri World Imagery (Esri, Maxar, Earthstar Geographics), each under its provider's terms.
- Terrain, hillshade and contours: Mapzen / AWS Terrain Tiles.
- Routes: the Valhalla routing engine (FOSSGIS servers) on OpenStreetMap data. Place search: Photon (komoot) on OpenStreetMap data.
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