Data sources & attribution

Last updated: June 15, 2026

Campound stands on the shoulders of an enormous amount of open data, public-agency datasets, and open-source software. The maps, tiles, trails, roads, ownership boundaries, campsite info, and routing graphs you see in the app come from the sources below. Thank you to everyone who maintains and contributes to them.

Basemaps and map tilesWhat you see under everything else

OpenStreetMap contributors

The foundational map of the world. The streets, paths, place names, and a huge amount of the trail and road network in Campound come from OSM contributors. If you find an error in OSM, edit it — it'll flow into Campound on the next data refresh.

OpenFreeMap

Free vector tiles served from OpenStreetMap data. The default Campound basemap is built on OpenFreeMap.

OpenTopoMap

Map data © OpenStreetMap contributors, SRTM · Map style © OpenTopoMap (CC-BY-SA) · opentopomap.org

The topographic basemap option. Contour lines, hillshade, and trail symbology come from OpenTopoMap.

Esri World Imagery

Tiles © Esri — Source: Esri, Maxar, Earthstar Geographics, and the GIS User Community

The satellite basemap option.

Mapbox

Paved-road basemap tiles and place search. Used under Mapbox's Terms of Service with a Campound API token.

Trails, roads, and routingThe off-road network

U.S. Forest Service (USFS)

U.S. public-domain data · data.fs.usda.gov

National forest trails, Motor Vehicle Use Map (MVUM) roads, NFS roads (non-MVUM), motorized trails. The "Trails" and "Vehicle routes" layers and turn-by-turn routing on the off-road network come from USFS Enterprise Data Warehouse extracts.

Bureau of Land Management (BLM)

U.S. public-domain data · gis.blm.gov

BLM motorized roads and motorized/non-motorized/non-mechanized trails (both open and limited). Used in the routing graph and visualized in the off-road overlays.

USGS Transportation National Map

U.S. public-domain data · usgs.gov

National Scenic and Historic Trails (PCT, AT, CDT, …), state-park and regional trails, federal-lands routes, and vehicular trails come from the USGS Trans_TrailSegment and Trans_RoadSegment datasets.

Mapbox Directions

Turn-by-turn directions on paved roads. The off-road graph (USFS + BLM + USGS) takes over once you leave the paved network.

Land ownership and protected areasThe colored shading on the map

USGS Protected Areas Database (PAD-US)

U.S. public-domain data · usgs.gov/pad-us

National parks, national forests, BLM lands, wilderness areas, state lands, and other protected-area boundaries. Drives the land-ownership color shading and the Lands legend.

Campsites, recreation areas, and reservationsWhere you sleep

Recreation.gov / RIDB

U.S. public-domain data · ridb.recreation.gov

The Recreation Information Database powers the campsite, facility, and recreation-area data — names, locations, amenities, activities, fees, and reservation availability.

National Park Service API

U.S. public-domain data · nps.gov/subjects/developer

Park-level details surfaced in the National Park dialog.

Elevation and terrainThe chart under your route

NASA SRTM

U.S. public-domain data · earthdata.nasa.gov

The Shuttle Radar Topography Mission digital elevation model underpins the contour and hillshade rendering on the topographic basemap.

Open-Elevation

open-elevation.com

Elevation samples along selected routes, used to build the elevation-profile chart.

State and specialty dataLayers you can toggle on per state

Colorado Parks & Wildlife

Gold Medal Streams (designated reaches on the Fryingpan, Roaring Fork, Gunnison, Animas, South Platte, and others). Visualized as a toggleable State layer.

SoftwareOpen-source projects Campound is built on

Campound is a React + TypeScript app built on Capacitor for iOS, iPadOS, and watchOS. The map renders with MapLibre GL. Vector and raster tiles use the PMTiles format for offline-first delivery; tiles are built with tippecanoe. We use Mantine for UI, Supabase for auth and sync, and Turf.js for geometry. A full open-source dependency list ships in the app bundle. Heartfelt thanks to the maintainers of every project we depend on.

Reporting an issue

Spot something we should be attributing differently, a dataset that needs to be credited, or a license concern? Email privacy@campound.com and we'll fix it.