Coordinate Systems

Use Settings > Coordinates to choose how OMN4 shows positions and how coordinate entry screens expect values to be entered.

Changing the coordinate system changes the format you see. It does not move saved routes, tracks, waypoints, or map data.

Coordinate Options

OMN4 currently shows these coordinate choices in Settings:

British National Grid for UK grid references.
Latitude/Longitude for coordinates shared with other apps, websites, GPS devices, and support tools.
UTM for workflows that use zone, easting, and northing values.

Precision Options

The Precision control changes depending on the coordinate system you choose.

For Latitude/Longitude, Precision selects the format:

Decimal Degrees
Degrees Decimal Minutes
Degrees Minutes Seconds

For British National Grid and UTM, Precision controls the amount of grid detail, from 100 Kilometres down to 1 Metre where available.

Prefix Letters And Spaces

Some coordinate formats also show:

Use Prefix Letter
Spaces

These settings change how the coordinate is written on screen. They do not change the underlying position.

What Changes

coordinate readouts on the map
coordinate search and entry tools
coordinate formatting used when sharing or checking locations

What Does Not Change

your saved routes, tracks, and waypoints
the map imagery itself
where an item is located