Great Britain launch source

Ordnance Survey maps in OMN4

OMN4 includes licensed Ordnance Survey mapping for Great Britain, subject to subscription. Ordnance Survey mapping is a featured launch map source, not the product definition: OMN4 remains outdoor mapping software for desktop and mobile.

See current GB plans Download OMN4

1:25,000 mapping

Detailed Great Britain mapping for walking, hiking, running, off-road cycling, and close route work.

1:50,000 mapping

A broader Great Britain view for longer routes, cycling, touring, and route planning across larger areas.

Maximum-detail GB mapping

Where the current plan includes additional Great Britain detail or imagery, keep the wording tied to that plan.

Plan with Ordnance Survey mapping

Use licensed Great Britain mapping as part of the wider OMN4 route and map workflow.

Download before you go

Prepare map areas on the device that will use them, then check status, storage, and verification.

Print with attribution

Public screenshots and printed map output must carry the required source acknowledgement.

Attribution guidance

Public launch screenshots that reproduce Ordnance Survey mapping need the required source acknowledgement visible on or beside the screenshot. Use the copyright year that matches the displayed map data; this page shows the current launch example.

Review placeholder

Screenshot required before public launch

Temporary imagery is acceptable for review, but the launch page needs a real OMN4 screenshot with Ordnance Survey attribution visible or adjacent.

Explore Ordnance Survey map pages

Individual map pages help visitors connect a named Ordnance Survey sheet with the broader OMN4 map-source and subscription context.

Explorer map index Landranger map index

Map help

For the operational detail on choosing, downloading, storing, and verifying maps in OMN4, use the map help centre.

Read map help