Map Anchor Catalog

You register each monument in three clear steps. First you add a photo and an identifier, then you choose the datum system, era, and any inscriptions, and finally you record how it was mounted, its physical size, and its current condition. Everything ends up in one tidy card that you can open or update later. There is also a grid view where you can place markers and check curvature and magnetic variation. The survey ledger shows how many marks and datums you have, how complete the archive is, and lets you estimate Earth curvature drop and refraction from a simple line-of-sight distance. All records and photos stay on your device. The app does not ask for an account and is not designed to collect user data. Is made for surveyors, map historians, researchers of old control networks, and anyone who wants a straightforward personal archive of field monuments without extra complexity.