Harvey Maps Romer

Accurate Grid Reference Tool for Outdoor Navigation

Let Harvey Maps Romer assist with your map-reading. It is a compact and essential tool for accurately plotting grid references on Harvey Maps, EastWest Maps and and Ordnance Survey Maps. Designed for outdoor enthusiasts, walkers, hikers, mountain leaders, and anyone who navigates using grid coordinates, the romer helps you quickly and precisely pinpoint locations on a map using a standard 6-figure grid reference.

Lightweight, durable, and easy to use, the Harvey Maps Romer is printed on clear plastic and includes multiple scales to match common mapping formats. Compatible with maps at 1:25,000, 1:30,000, 1:40,000, and 1:50,000 scales, it allows you to measure eastings and northings accurately and plot or read coordinates down to 100 metres.

A romer works by aligning its scale grid with the map’s grid lines, allowing you to read or plot the final two digits of a 6-figure grid reference with precision.

Whether you're practicing navigation for a Mountain Skills Course, leading group hikes, or simply exploring new terrain, the Harvey Maps Romer adds confidence to your map reading—especially in poor visibility or remote areas where precision matters. Its transparent design allows you to overlay it directly on your map without obscuring details, and the clearly marked grids make learning and using grid references straightforward for all skill levels.

Small enough to fit in your map case or pocket, it’s an ideal backup to GPS devices and an essential addition to your navigation kit.

Trusted by outdoor professionals, training providers, and expedition leaders, the Harvey Maps Romer is a practical, affordable tool that no serious map user should be without.