Metal detecting research

How To Research Land For Metal Detecting

A practical beginner guide to using old maps, Google Earth, field names, local history and common-sense search planning to work out where to detect on a permission.

Quick note before we start:

Research does not replace permission. It also does not give you the right to detect protected land. Before detecting anywhere new, make sure you have permission and check whether the land includes scheduled monuments, SSSIs, protected habitats, stewardship restrictions or other limits. For the full legal background, read the UK Metal Detecting Laws & Code Of Conduct guide.

Sometimes the research pays off beautifully. Sometimes the most promising-looking spot produces nothing but shotgun caps, lead and bits off a tractor. That is detecting. But good research gives you a plan, and a plan is better than wandering around like a lost badger.

Why research matters before you detect

A field is not just a field.

It might look empty now, but 100, 300 or 800 years ago it could have had a footpath running across it, a cottage in the corner, a mill nearby, a fairground on the edge, a chapel next door, an old lane through the middle, or a stream crossing where people gathered and dropped things.

Research helps you spot those clues before you waste all your energy searching the wrong area.

That does not mean every old map clue leads to finds. If only it were that easy. A building marked on an old map might have been demolished and cleared properly. An old track might have been used for centuries or barely used at all. A promising field name might mean something exciting, or it might be one of those historic naming quirks that sends you on a wild goose chase.

But research stacks the odds slightly more in your favour.

The aim is not to overthink everything. The aim is to turn a big blank permission into a handful of sensible places to search first.

The mistake beginners make on a new permission

The classic beginner mistake is getting a new permission and charging straight into the first field without a plan.

I understand why it happens. You are excited. You have finally got somewhere to detect. The detector is in your hand and all you want to do is hear that first signal.

But if the permission has multiple fields, old boundaries, footpaths, slopes, wet areas, buildings nearby or historic features, you are almost certainly better off spending a little bit of time researching before you start.

You are not just covering ground. You are learning the permission.

What are you actually looking for?

When researching land, beginners often ask, “Where would treasure be?”

I think that is the wrong first question.

A better question is, “Where would people have been?”

Most detecting finds are not hidden treasure. They are dropped objects, lost objects, broken objects, discarded objects and everyday things that ended up in the soil. Coins, buckles, buttons, thimbles, tokens, musket balls, lead weights, harness fittings and all the strange little bits that keep us guessing.

So you are looking for human activity. Where people walked. Where they worked. Where they crossed water. Where they entered fields. Where they met. Where animals were handled. Where buildings once stood. Where old lanes ran. Where people had reason to stop.

Start with the landowner

Before you get lost in old maps and satellite imagery, speak to the person who knows the land.

Farmers and landowners often know things maps do not tell you. They may know where old pottery comes up after ploughing, where a cottage once stood, where an old track ran, where the soil changes, where the wet patches are, where rubbish has been tipped, where livestock gather, and where you absolutely should not go.

They may also know the land’s recent history. That can be just as useful as medieval history. A field used for village events, camping, wartime activity, horse shows, car boots or old farmyards may produce plenty of interesting finds.

That last question matters. If the landowner wants you in a certain area first, respect that. Permissions are built on trust, not just research.

Research method one

Using old maps for metal detecting research

Old maps are one of the best tools a detectorist can use. For UK research the free, georeferenced historic Ordnance Survey maps at the National Library of Scotland maps site are the ones most detectorists reach for first.

Modern fields can look plain and boring, but old maps can show you what used to be there. Roads that no longer exist. Field boundaries that have been removed. Old cottages. Mills. Chapels. Inns. Quarries. Ponds. Wells. Footpaths. Tracks. Farmyards. Railways. Brickworks. The list goes on.

The trick is not just looking at an old map and thinking, “old equals good”. The trick is comparing old maps with modern satellite imagery and asking what changed.

When using old maps, pay attention to what has disappeared. A removed hedge line may still have a trail of lost items along it. A former building may leave brick, tile, pottery and domestic rubbish. An old path may still show as a faint line in crops or soil.

Also pay attention to map dates. A feature shown on an 1880s map might not be medieval. It might be Victorian. That is still interesting, but do not convince yourself every square on an old map is Saxon treasure headquarters.

Old maps are clues, not guarantees. Use them to build a search plan, not to convince yourself you are definitely about to find a hoard by lunchtime.

Old map clues and what they might mean

Some map features are more useful than others. This table gives you a beginner-friendly way to think about them.

Research method two

Using Google Earth for metal detecting research

Google Earth is one of the most useful modern tools for researching a permission.

Old maps show you what used to be there. Google Earth helps you compare that with what is there now. You can look at field shapes, old boundaries, crop marks, soil marks, access points, slopes, watercourses, tracks, gateways, footpaths and possible areas of past activity.

The historical imagery feature is especially useful because fields can look completely different depending on the year, season, crop, weather and lighting. One image might show nothing. Another might reveal a clear crop mark, old boundary or building platform.

Do not treat every mark in a field as archaeology. Some marks are drainage, tractor lines, crop stress, modern disturbance, animal paths or your imagination having a little party. Compare the imagery with old maps and the actual land before making big conclusions.

Google Earth is brilliant, but it is not magic. It gives clues. You still have to walk the land, listen to your detector and see what the ground actually says.

A simple Google Earth research process

You do not need to become a mapping expert. A simple process is enough for most permissions.

Try not to make the plan too complicated. You are not preparing a military operation. You are giving yourself a sensible starting point.

A good plan might be as simple as: “Search the old path line first, then the former building corner, then the high ridge near the stream crossing.”

Bonus research method

Using LiDAR for metal detecting research

LiDAR is one of those research tools that sounds complicated at first, but the basic idea is fairly simple.

LiDAR stands for Light Detection and Ranging. In England the Environment Agency’s National LiDAR Programme data is freely available to view. In plain English, it uses laser scanning to measure the shape of the ground. The clever bit is that it can help reveal lumps, bumps, banks, ditches, platforms, old trackways, ridge and furrow, earthworks and other features that are not always obvious on normal satellite images.

For metal detecting research, LiDAR can be especially useful when old maps and Google Earth do not tell the full story. A field might look flat from above, but LiDAR may show old boundaries, hollow ways, building platforms or earthworks that are difficult to see at ground level.

It can also be useful in woodland, where normal aerial imagery is often blocked by tree cover. That does not mean you can detect woodland without permission, of course. It just means LiDAR can sometimes show landscape features hidden beneath the trees.

The important thing is not to treat every bump on a LiDAR image as a secret treasure site. Some features are natural. Some are modern. Some are drainage, quarrying, landscaping, animal movement, forestry work or old agricultural activity. Like old maps and Google Earth, LiDAR gives you clues, not guarantees.

It is also where you need to be extra responsible. If LiDAR shows clear earthworks, a possible settlement, a mound, a defensive feature, an old enclosure or anything that looks archaeologically sensitive, that is not your cue to rush out with a detector. It is your cue to check whether the site is protected and whether detecting there is allowed at all.

For beginners, I would use LiDAR as a second-stage research tool. Start with permission, old maps, Google Earth and the landowner’s knowledge. Then use LiDAR to see whether the shape of the land supports what your other research is telling you.

Used properly, LiDAR can make your research much stronger. Used badly, it can send you chasing random bumps or, worse, into places you should not be detecting. Treat it with respect.

Research method three

Field names and what they can tell you

Field names can be brilliant clues.

Not always. Some are boring. Some are misleading. Some changed over time. Some were named after people, shapes, animals, crops or local nicknames. But every now and then, a field name gives you a proper nudge.

If the landowner knows the old field names, write them down. If you can find tithe maps, estate maps, old deeds or local history records, field names can sometimes help you understand what the land was used for.

Field names are clues, not proof. Use them alongside maps, local history and what you actually find on the ground.

Research method four

Using local history for detecting research

Local history can be absolute gold for metal detecting research.

I do not just mean huge famous events. The little local details often matter more. Old fairs, lost pubs, village greens, footpaths to church, wartime camps, mills, brickworks, markets, schools, smithies, ferry points, old sports fields and vanished cottages can all point you towards human activity.

You can find this sort of information in all kinds of places.

Do not underestimate people. An older local may remember where a farm cottage stood, where the village fete was held, where old cottages were demolished, or where coins used to be found after ploughing.

Just be polite. Do not barge into local groups asking where the treasure is buried. Ask about history, old paths, lost buildings and stories of the land.

You are more likely to get helpful answers if you sound interested in the history, not like you are mining the village for secret spots.

Research method five

Using the PAS database carefully

The Portable Antiquities Scheme database can be very useful for research, but it needs to be used responsibly.

It can show you the types of finds recorded in a wider area. That can help you understand the local history, common periods, object types and general activity around a parish or landscape.

What it should not become is a treasure map.

Do not use PAS records to target exact find spots, bother landowners, chase protected sites or assume that nearby recorded finds mean you can detect anywhere close by. Permission and protected-site checks still come first.

For example, if a wider area has a lot of Roman records, that tells you Roman activity existed locally. It does not mean your permission has Roman finds, and it definitely does not mean you should detect any scheduled Roman site nearby.

The responsible approach is to use PAS for context and education, then record your own eligible finds properly if you discover them. If you are unsure what something is, our guide on how to identify metal detecting finds walks through it.

Check protected sites before detecting

This is not the fun bit, but it is one of the most important parts of research.

Before detecting new land, you should check whether any part of the permission is protected, restricted or sensitive. The landowner may not always know, and even if they do, it is still your responsibility to avoid places you should not detect.

If part of a permission includes a scheduled monument, do not detect it unless you have the correct official consent. Detecting on a scheduled monument without consent is a criminal offence, and normal landowner permission is not enough for protected heritage sites. You can check whether land is a Site of Special Scientific Interest using Natural England’s designated sites map.

If in doubt, stay away from the questionable area and get proper advice. There is always another patch of land. There is not another reputation once you have wrecked it.

Best places to search on a metal detecting permission

Once you have done your research, you need to turn it into actual searching.

This is where beginners can overcomplicate things. You do not need to detect every inch straight away. Start with the areas most likely to have seen repeated human activity.

Different permissions need different thinking

Not every permission should be searched the same way.

A ploughed field, pasture field, stubble field, woodland permission and beach area all need slightly different planning. The research gives you clues, but the ground conditions decide how easy the detecting will be.

How to turn research into a search plan

This is where research becomes useful.

It is easy to spend hours looking at maps, taking screenshots and convincing yourself you have cracked the code. But unless that turns into a simple field plan, it stays as research rather than detecting.

Keep your plan basic. Pick a few priority areas, decide the order, then search them properly.