See where each era left its mark.

Density heatmaps built from the recorded record — Roman, Bronze Age, Iron Age, early-medieval, medieval and post-medieval — so you can read where each period was active across the landscape.

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What it is

Read the landscape by era

Recorded activity isn't spread evenly — Roman, Saxon and medieval life concentrated in particular places. Detector Maps turns the recorded record into period heatmaps, so you can match the era you're chasing to the ground that has it.

What the layer shows you

Four ways detectorists put it to work

One era at a time

Switch between periods to read where each was active.

Hotspots at a glance

Density shading flags the busiest ground for a period.

Match field to period

Line up a heatmap with land you can access.

Build the story

Layer heatmaps over finds and old maps for the full picture.

In the app

Six eras, mapped

Roman

Roman-period density.

Bronze Age

Bronze Age density.

Iron Age

Iron Age density.

Early medieval

Saxon-era density.

Post-medieval

Later activity.

Other periods

Everything else.

FAQ

Heatmaps questions, straight answers.

What are the heatmaps built from?

The recorded archaeological and finds record, aggregated by period into density shading — a read on where each era was active, not a record of individual finds.

Which periods are covered?

Roman, Bronze Age, Iron Age, early-medieval, medieval, post-medieval and other periods, where the record supports it.

How do I use them?

Pick the era you’re interested in, find the hotspots, then check which of that ground you can actually get permission on.

Does a hotspot guarantee finds?

No — it shows where the period was active in the record. It’s a research tool to focus your effort, nothing more.

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