Almost every county in England keeps a map that few people ever see. It is not a glossy Ordnance Survey sheet or a layer in a phone app, but a legal record of who may walk, ride or drive where. It decides whether the path at the end of your lane is a public right or a private track. Learn how it works, and you can map, protect and improve the paths on your own doorstep.

What the definitive map actually records

Every highway authority in England and Wales keeps a definitive map and statement. The map shows the line of each path; the statement describes it, including width and any limitations such as stiles, gates or seasonal conditions. The duty dates back to the National Parks and Access to the Countryside Act 1949 and is now maintained under the Wildlife and Countryside Act 1981.

Highway authority here means county councils, unitary authorities and national park authorities. District and town councils usually do not hold the record, which is the single most common reason a query goes unanswered for weeks. If you email the wrong office, you will be passed along.

There are four categories, and the differences matter as much to a cyclist or rider as to a walker:

• Footpath — on foot only. No bikes, no horses.
• Bridleway — on foot, on horseback and on a pedal cycle. Cyclists must give way to walkers and riders.
• Restricted byway — as a bridleway, plus horse-drawn vehicles and other non-motorised transport.
• Byway open to all traffic — the full range, including motor vehicles, though many are effectively impassable in practice.

The definitive map is conclusive evidence that the rights shown on it exist. It is not evidence that no other rights exist.

That last point is easy to forget. Unrecorded public paths are a real category, and they are precisely what the modification process exists to resolve.

Access land is a different map entirely

Open access land comes from the Countryside and Rights of Way Act 2000, usually shortened to CRoW. It covers open country — mountain, moor, heath and down — plus registered common land, mapped separately by Natural England and, in Wales, by Natural Resources Wales.

Access on this land is on foot only. It has nothing to do with whether a right of way crosses it. You can have access land with no paths at all, and paths crossing land with no access rights. Both appear on Ordnance Survey Explorer mapping, but they are distinct legal layers, and it pays to keep them apart when you are mapping.

Expect restrictions, too. Some access land is closed or limited for land management, safety or conservation reasons, and dogs are normally required to be on a short lead between 1 March and 31 July. Those restrictions are published as a live dataset rather than printed on paper maps.

Where the open data actually lives

There is no single national rights of way dataset for England and Wales. Each authority publishes what it publishes, in whatever format it prefers — and that variety is the main obstacle to mapping at scale. Realistic starting points include:

• Your council's own portal, often under a "rights of way" or "public access" page. Formats range from PDFs to shapefiles, KML and web map services.
• Aggregator sites that pull council datasets together, useful for a quick first look and for checking what a neighbouring authority holds.
• data.gov.uk and DataMapWales, where some authorities publish under the Open Government Licence. Attribution is usually required, so read the licence before republishing.
• Defra's MAGIC mapping service and Natural England's open data for the CRoW access layer and related designations.
• Ordnance Survey Explorer mapping, which shows rights of way clearly at 1:25,000, and OpenStreetMap, which carries path tags added by volunteers.

One warning: completeness varies enormously. Some councils digitised everything years ago; others still hold hand-annotated paper. If a path is missing from a dataset, that tells you nothing about whether the right exists.

Building a local path map

If you want something genuinely useful — for a parish council, a walking group or your own records — work at parish scale and be methodical.

1. Pick one parish or a handful of contiguous grid squares. Ambition is the enemy of accuracy here.
2. Download the authoritative council dataset for that area, plus the CRoW access layer if any applies.
3. Check the coordinate system before anything else. OS national grid data is EPSG:27700, and mixing it with latitude and longitude will scatter your paths into the sea.
4. Walk the routes and record a GPS trace, photographs and short notes on gates, stiles, signs and obstructions.
5. Compare your trace with the definitive line. Small divergences are normal; large ones are worth reporting.
6. Keep a dated log. Evidence is what wins arguments later.

QGIS is the obvious free desktop tool, and it handles shapefiles, GeoPackage and web services without complaint. Pen and paper work fine too — the discipline of a consistent record matters more than the software.

When the record is wrong, or simply out of date

Anyone can apply to a highway authority for a modification order to add, delete, upgrade or divert a path. Applications need evidence: dated photographs, GPS traces, witness statements, or historic documents such as tithe maps, enclosure awards and estate plans. The authority must then investigate and decide.

Separately, if a recorded path is blocked, ploughed, overgrown or wrongly gated, report it to the rights of way team. Authorities have a duty to assert and protect public rights of way, and they must signpost paths where they leave a public road. A short, factual email with a grid reference and a photo gets far better results than a complaint about the state of the countryside.

Note that the long-discussed cut-off date for recording historic rights of way has been moved and revised more than once, and Welsh reform of the system has been under consultation. Check the current position with Defra, the Welsh Government or your authority before relying on any deadline. If a claim becomes contested, take advice from a solicitor experienced in rights of way rather than going it alone.

Start with a single path

Choose one footpath near you that is awkward, unsigned or quietly overgrown. Look it up on the definitive map, walk it with a GPS trace running, photograph the problems and send a short report to the highway authority. Then add the route to OpenStreetMap so the next person can find it.

One path is a manageable project. Twenty paths mapped properly is a genuine local asset — and if you want company, parish councils, local access forums, rambling and equestrian groups are usually delighted to hear from someone who has already done the groundwork.

Photo: Ann Perkas / Pexels