How Lodester's Coordinates Work
Every point in Lodester is a WGS84 latitude/longitude in decimal degrees — the same reference frame your phone's GPS uses. This page explains exactly what a coordinate in the app means, and, just as importantly, what it does not.
The coordinate frame
Lodester stores and shows positions as decimal-degree latitude, longitude on the WGS84 datum. Latitude runs from −90 to +90 (south to north); longitude from −180 to +180 (west to east). A negative longitude is west — that covers essentially all of the United States. Because the app and modern handheld GPS share WGS84, a coordinate you read here drops onto your device without a datum shift. (If your GPS is set to NAD27, expect an offset — see Map Datums & GPS Accuracy.)
What a marked point means — and it varies by layer
Not every point in Lodester carries the same certainty, and the app is built to say so plainly rather than imply false precision:
- Lost Treasures — a treasure's point is the center of the associated search area or landmark, tagged interpreted — never the treasure itself. By definition a lost treasure has no known exact location; the dot is a region anchor, not an X on the spot.
- Mines (USGS MRDS) — coordinates come from the USGS Mineral Resources Data System. Many are solid; some older records are approximate or were digitized from small-scale maps, and the database has been frozen since 2011. Treat a mine point as "near here," not survey-grade.
- Your own finds & waypoints — these are only as accurate as the GPS fix you saved them with (see Using GPS in the Field).
Reading, entering, and sharing a point
When you open a place, Lodester shows its coordinates and a Show on map action. On mobile it hands the point to the map view via a deep link; on desktop it copies the latitude, longitude to your clipboard so you can paste it into a GPS, another map, or a message. Because the format is plain decimal-degree WGS84, it is portable to almost any tool without conversion.
Why "search-area center" is honesty, not pessimism
Calling a point a search-area center is a deliberate design choice: it tells you the truth about how much is actually known. A confident-looking pin on a lost treasure would be a lie. The same discipline applies to confidence labels throughout the app — they describe the strength of the underlying evidence, not a promise. A point is a place to start researching and verifying, never an instruction to dig or to enter.
In Lodester
Set your GPS to WGS84 so it matches the app. Read every point for what it claims to be: a search-area center, an approximate mine location, or your own saved fix. Before acting on any point, confirm land status and access with the live BLM land & claims panel and on the ground — Lodester is decision-support, not permission. This is general guidance, not legal advice.