GeoPDF maps on iPhone, offline with GPS

1. Open app.cartahaven.com in Safari.
2. Tap Share, then Add to Home Screen.
3. Open Cartahaven from the Home Screen, and do everything from there: maps saved in Safari and maps saved in the Home Screen app are kept apart.
4. Tap Import and choose a GeoPDF from Files (iCloud Drive, On My iPhone, or a file you saved from Mail or Safari), up to 500 MB. Your position shows on it straight away.
5. Turn on airplane mode and open the map once, to make sure it is on the phone before you lose signal.

• GeoPDFs and georeferenced PDF map books, GeoTIFFs, and scans you place yourself (how), all free.
• Your GPS position on the map with no signal, track recording, placemarks with photos, and GPX, KML or GeoJSON export.
• Maps from the store, free or paid: get them on the website, then “Get my maps” in the app.
• A background map, elevation and US public land boundaries saved around each map; offline satellite imagery and weather radar with Plus ($9.99 a year).
• The free field tools: a UTM or MGRS grid, walking a bearing, “Where am I, in words”, red-light night mode, voice cues and trip check-in, plus wildfires and avalanche danger over the map.

• Screen off: iPhone stops GPS for a web app when the screen locks or you switch apps. While you record a track the web app keeps the screen on; dim it to save battery.
• Storage: deleting the Home Screen app, or clearing Safari’s website data, removes the maps from that phone. Store maps download again from “My purchases”; sign in with backup on to keep your tracks and placemarks.
• Very large maps: files over about 250 MB are best on a recent iPhone or an iPad; older iPhones may not open them.

These are limits of web apps on iPhone, not of the maps.

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