Benchmark Locator
Benchmark Locator
NGS control monuments · PLSS section grid
Pick a township section. See the control monuments inside it with their condition and full datasheet, then send the whole section to your data collector — before you pull out of the turnout.
How it works
Tap the map or let it locate you. Section lines come from the BLM national PLSS, so the boundaries are the ones on your plat.
Every monument inside the section, each showing its condition — so a benchmark reported destroyed is obvious before you drive to it.
The full published record for that PID: State Plane with its zone first, feet and metres, then latitude and longitude. The NGS datasheet is one tap away.
The whole section as a file — copy it, share it, download it, or email it to yourself. Your format is remembered for next time.
Precision
A northing exported as 890485.564 and read back as 890485.56 is a quarter-inch error the software handed you, silently. Nothing here rounds a coordinate. The file is rendered once, on the server, so the copied, downloaded and emailed versions are byte for byte identical.
Feet are converted per state, not with one factor. Every state legislates the US survey foot except AZ MI MT ND OR SC, which use the international foot. The two differ by roughly 3.7 ft on a typical northing — a surveying difference, not a rounding one.
1,890485.564,651034.765,1086.94,DV0490 - MESAPORT AZ MK 2,889221.123,651998.301,1092.11,DV2071 - ARLINGTON RM 2 3,888904.887,650117.442,1081.60,DV2076 - GILA BEND AZ …no header row, no comment lines — a data collector reads the first field as a point number
Export
PNEZD is point, northing, easting, elevation, description — five bare fields, numbered from one, with nothing in front of them. It is what a data collector and every CAD package import, and it is what the app opens on.
Lat / Long is the full record with a header row, for the spreadsheet the job usually ends up in. Benchmarks with no published elevation are called out rather than left silently blank, because an empty field and a zero are not the same thing to the software downstream.
In the field
With Pro, sections you have looked at are saved on the device automatically, with their benchmarks and the map tiles under them. Drive into a canyon and the data you already pulled is still there — no sync button, no "you are offline" wall between you and a coordinate you loaded an hour ago.
The map remembers the section you were last working in, and the format you last sent. A surveyor works one job in one coordinate system, so neither should be a decision you make twice.
Everything the app remembers stays on the device. Your account is just an email address, used to sign you in and to run a Pro subscription. An address you send a file to is used for that one email and not kept, and nothing is sold.
Pricing
Pay securely through Stripe, then sign in to the app with the same email. Cancel anytime.
Get started
Nothing to install to try it — it runs in the browser, and installs to your home screen if you want it there.