PlotZone: MGRS & UTM plotter

A line is something you travel. A waypoint is something you read. Plot both, then send the brief into the thread: bearings, distances and grids, nothing to open.

A position is passed once. A wrong digit is a kilometer, and out there nobody gets a second read.

PlotZone exists for one reason: so that the reading, the conversion and the bearing are never the weak link. Every figure is computed on the device, against the published references. Nothing needs a signal, an account or a subscription, and nothing you plot ever leaves your phone.

Built by an operator who plots for a living. For search and rescue, wildland fire crews, drone pilots, free-flight pilots and military personnel.

ONE-TIME PURCHASE

Bought once, yours for good. No subscription, no in-app purchase, no password.

MISSIONS

Group your points and zones by operation. Each point carries a name, its coordinates, a radius in meters, feet or nautical miles, and a color. Drag it on the map. Duplicate a whole mission to build a variant without typing it again.

COORDINATES

Five formats, both ways: decimal degrees, degrees-minutes-seconds, degrees-decimal-minutes, MGRS and UTM. Tap the map to read a position, tap a result to copy it. Five geodetic datums: WGS 84, NAD27, ED50, OSGB36 and AGD66. Every coordinate is read and typed in the one you pick.

MGRS AND USNG GRID

Draw the MGRS grid at 1 km or 100 m, labeled like a military map: grid zone, 100 km square, and the principal digits of every line. The US National Grid uses the same squares and letters, so a USNG reference reads straight off. At a grid zone junction the grid switches zones with you.

The GARS grid overlays the same way, at 30', 15' or 5'. The cell you stand in is written at the top, and that line can be tapped: type any designator and the map goes there.

YOUR LIVE POSITION

Your position is followed live, with its accuracy, in the format you chose. Tap a point, or any spot, and the top of the screen gives the bearing and distance from where you stand, updated as you walk.

THREE NORTHS

Bearings in true north as on a map, in magnetic north as on a compass, or in grid north, which is what a protractor measures on a military chart. The declination is the one where you stand: the device reports it, or you set it by hand.

BULL'S EYE

Pick one point as the reference. PlotZone gives the bearing and distance from it to every other point, and draws twelve rings around it with radials every 30°. The rings follow the zoom, from a quarter of a mile to two hundred. The reference travels inside the exported file, so your correspondent reads the same bearings.

FROM A BEARING AND A DISTANCE

Give a bearing and a distance from any point of the mission, and the point is plotted. The way a position is passed on the radio.

ZONES AND MEASURE

Type the vertices, or draw the polygon with your finger, and watch its area and perimeter as you go. Two taps, on the map or on plotted points, give the bearing and distance between them.

AIRSPACE

Load your working area from your own files: KMZ, KML, OpenAir and GeoJSON. Show several at once, each in its own color and opacity, so two sectors never blur together.

BASE MAPS

Satellite, hybrid and standard from Apple. Or import your own MBTiles: its tiles are copied to the device and drawn over Apple's, so your sector stays readable with no network at all.

IMPORT AND EXPORT

Eight formats: PlotZone (.json), a plain-text brief, CSV, GPX, KML, KMZ, GeoJSON and OpenAir. A mission comes back in with nothing lost.

ACCESSIBILITY

Every control is named for VoiceOver, symbols included, and a grid reference is spoken the way it is passed on the radio: 11S LU 94979 is read one, one, Sierra, Lima, Uniform, nine, four, nine, seven, nine.

PRIVACY

No account, no tracker, no analytics, no advertising. Your missions stay on your device. Your GPS position draws you on the map and is never transmitted.

DISCLAIMER

Coordinate conversions and distance calculations are provided for guidance. Always check your data against an official source before any critical use. PlotZone is not a certified navigation instrument.