The national park map, alive on your phone
Every national park hands you a beautiful map at the gate — and every map app ignores it. NomadTracks bridges that: photograph the handout or import the park's PDF, anchor it with a few control points, and the official map becomes a live layer over your GPS map. Your blue dot, the ranger's cartography, zero signal needed.
This page explains the workflow and why it beats generic map layers in parks from Etosha to Bryce Canyon.
Why park maps beat generic maps
Park maps show what matters inside the park: official trail names, ranger stations, designated campsites, waterholes, closures. Generic basemaps show a green polygon. When you're deciding between Peekaboo Loop connectors at 2,400 m, you want the NPS map — with your position on it.
The 2-minute setup at the trailhead
Open NomadTracks, photograph the map (flat, straight from above), tap matching spots on your photo and the live map — road junctions and summits work great — and save. Four well-spread control points typically align a park handout to within a few meters; the app shows the accuracy as an RMS value so you know exactly how much to trust it.
GeoPDF and GeoTIFF: zero-setup imports
Many parks and agencies publish georeferenced PDFs and TIFFs — the USGS, the USFS, alpine clubs, and notably the Bureau of Land Management, whose free library covers thousands of maps of US public lands, national monuments and recreation areas. NomadTracks reads the embedded geospatial data and aligns them automatically — import, done. The built-in geospatial parser can be re-run anytime as it improves.
Fully offline, by design
The overlay lives on your device; GPS needs no network. The Namibia expedition on this site navigated Khaudum National Park — a park that is two sand ruts and no coverage — exactly this way.
Related
- Step-by-step: georeference a paper map
- Track story: Bryce Canyon with the NPS map as overlay
- Track story: 4,250 km Namibia with park-map overlays
FAQ
Does this work with any park map?
Yes — any map that geometrically matches reality (virtually all official park maps do). Stylized cartoon maps work too, just with lower accuracy.
Do I need to buy anything?
No. Custom map overlays are a free NomadTracks feature, including the camera workflow and GeoPDF/GeoTIFF import.
How accurate is a photographed paper map?
With 4 well-spread control points, typically within a few meters — NomadTracks displays the RMS error so the accuracy is never a guess.