Marker
A publicly documented feature reference, not a survey-grade fix or an excavation prompt.
Circle
Approximate or generalised public geography. The centre is a reference, not a hidden pin.
Withheld
A positive decision to emit no public position. It is not a puzzle or a missing pin.
No geometry
The public evidence does not support a defensible map position, so none is invented.
A symbol is not permission
This article explains how to read a place page as an evidence summary. It does not grant access, detecting consent, an excavation licence, diving authority or permission to survey. Isle of Man heritage law, landowner permission and current official guidance still apply before any field activity.
What a place page is for
Each place page gathers named public evidence about a discovery, wreck, survey or monument. The map exists to make that evidence readable and to admit uncertainty. It is not arranged as a treasure-hunting hit list, and a tidy card should not be mistaken for a field instruction. The page is useful when it shows what a source actually says, who published it, and which limits the atlas has accepted.
That purpose is narrower than a conventional pin map. A reader can learn that a monument is publicly documented, that a wreck report gives an approximate historical position, or that a survey was completed without a publishable footprint. Those are different historical facts. Treating every card as a place one might visit, detect or excavate collapses them into a single unsafe reading. The honest use of the page is to understand the record, then to stop where the evidence stops.
Marker, circle or withheld
Symbols matter. A precise marker, a broader circle and a withheld location mean different confidence and publication choices. If the journal guide on symbols is linked from the page, read it before assuming you know where something sits on the ground. The symbol answers a publication question. It does not answer whether land is open, whether an owner consents, or whether any statutory approval exists.
A marker is reserved for an already public feature or visitor landmark, often following a position already published in the Isle of Man Historic Environment Record. Tynwald Hill is the atlas example of a named public monument, not a confidential findspot. The marker tells you which public feature the record concerns. It does not convert that reference into survey-grade accuracy, and it does not draw the legal boundary of a monument, a protected area or a right of way. A circle is used when a sharp pin would imply more precision than the evidence or the sensitivity review supports. The centre is a public reference used to display an approximate or generalised area. It must not be read as an original findspot, the centre of a deposit, or the best place to begin a search. Zooming in cannot add evidence. Digital maps can draw a smooth circle at street scale, but visual sharpness is only rendering.
Withheld is not the same as no geometry
A withheld location is not a missing-data accident. It is an explicit publication decision: the record can be useful without releasing a deployable position. Manx Treasure Map uses this treatment for confidential recent finds, vulnerable burial archaeology, private residences, active research contexts and other cases where a public coordinate would add risk without adding proportionate historical understanding. When a location is withheld, the public build contains no position, radius or spatial structured data for that record. A parish or broad region may appear only when a source has already published it responsibly.
No geometry is a different decision. Withholding means a location may be known but must not be published. No geometry means the public evidence reviewed for the atlas does not establish a defensible position for the specific thing being described. A document might confirm that a survey occurred without publishing a footprint. Mapping an estate entrance, a place-name centroid or the middle of a named landscape would invent precision the source never offered. Keeping such a record off the map preserves useful history and makes the evidence gap explicit. A later primary report could change that decision if it publishes a responsible footprint and the sensitivity review permits display. Until then, no geometry is the accurate answer.
A safe reading sequence
Read the place title and summary first and ask what was found, surveyed or recorded. Then check dates and named sources. Prefer original reports, official records and primary announcements over secondary retellings. A later retelling can repeat a story while dropping the uncertainty the original author stated. The place page should send a reader back to the named source. It does not replace that source, and it should not be paraphrased into a sharper claim than the citation supports.
Next, note whether the location is exact, approximate or withheld, and read the coordinate basis beside the symbol. Those sentences matter more than the apparent sharpness of the graphic. Separate the confidence label from location precision: a confirmed account can still be withheld, and a broad circle does not automatically mean the history is weak. Follow the methodology page for how those labels are defined, and follow the law and reporting page for reporting duties and land access. Do not invent coordinates or secret tips from the narrative, from a place name, or from a nearby public landmark.
What the map does not do
The map does not grant access rights, detecting permission or archaeological excavation authority. Isle of Man heritage law and landowner permission still apply. A publicly visible marker or circle is not proof of public access. It is not a protected-area consent, an excavation licence, geophysical-survey approval, diving authority or salvage permission. Public roads, visitor places, private land, protected monuments, burial grounds and coastal waters raise different practical and legal questions that one icon cannot settle. The official consolidated Manx Museum and National Trust Act should be read directly, and Manx National Heritage publishes practical archaeology guidance that can change.
If evidence is incomplete, the honest response is to leave the gap visible rather than fill it with rumour. Official announcements sometimes model that restraint. Manx National Heritage has published important treasure accounts while keeping the discovery location confidential. The atlas should not reverse that choice through inference, cross-referencing or speculative language. Withholding can coexist with confirmed evidence: it describes what is safe to publish, not whether the object or event is genuine. If something is found, protect its context and use the official reporting route promptly. Wreck material follows a separate official route. Nothing about a place page changes those responsibilities.
GPR pages are not dig sites
Ground-penetrating radar pages document survey work and interpretation limits. They are not automatic excavation records, and a GPR entry is not a dig site merely because radar was used. A completed survey can be historically useful while its public footprint remains unpublished, approximate or withheld. An anomaly, a traverse description or a project name is not, by itself, a place where excavation has been authorised or even shown to be informative. The GPR guide separates archaeological survey contexts from planning, engineering and geological contexts, and it refuses to count a project the cited method does not support.
Read a GPR place page for the method, the date, the named report and the stated limit. If the page says a footprint was not published, do not reconstruct a working grid from an estate name, a caption or a nearby public feature. Survey evidence and excavation evidence are different claims. A page that documents the first does not silently become the second. The same reading applies to other geophysical methods mentioned only to explain why they are not GPR: the label on the page is part of the evidence, and substituting a more exciting method is a form of rumour.
Next useful clicks
Start from the discoveries index when you want the curated discovery records, from this evidence journal when you need the reading rules, and from law and reporting when you need the compliance path rather than a story. The methodology page explains the source hierarchy, confidence labels, generalisation rules and the boundary between a public reference and a defensible claim. Use those pages together. A single place card is a summary of cited evidence. It is not the whole atlas, and it is not a substitute for the current official text.
Many mapped places sit on private land, are restricted, or are deliberately imprecise. Some records have no public geometry at all. The useful next click is therefore often a source, a method page or an official reporting route, not a tighter zoom. If a page withholds a location, treat that as the finished public answer for this website. Corrections that improve the public record are welcome when they cite a stable source. Confidential findspots, personal information and active-site intelligence should go through the appropriate heritage reporting channel rather than a public-history page that tries to complete the map.
Primary and official evidence
Sources checked for this guide
Access dates record the evidence reviewed for this edition. Follow the current official material before relying on a rule or reporting route.
- IOMHER: Tynwald Hill public monument recordOfficial Historic Environment Record example of a named public monument used as a feature reference rather than a confidential findspot. Accessed .
- Manx Museum and National Trust Act 1959 — current consolidated textPrimary legislation to consult directly for reporting, protected-area detector use and archaeological excavation. The service may present an anti-bot challenge before serving the PDF. Accessed .
- Archaeology on the Isle of Man — Manx National Heritage guideOfficial practical archaeology guidance and contact information for readers who need the compliance path. Accessed .
- Treasure Act 2017 — enacted textOfficial text covering the notification route for objects believed to be treasure. Accessed .
- Manx National Heritage: Viking hoard declared treasureOfficial public announcement that reports a discovery while expressly keeping its location confidential. Accessed .
- Diving and wrecks — Isle of Man GovernmentOfficial information on the separate Receiver of Wreck reporting route for material recovered from Manx territorial waters. Accessed .
Questions readers ask
Marker, circle and withheld-location FAQ
Can I visit every mapped place?
No. Many sites are on private land, restricted, or deliberately imprecise. A place page records public evidence and a publication choice. It does not confirm a right of way, an open visitor site or any consent to enter. Check ownership, designations and current notices before assuming a mapped record can be visited.
Is GPR always listed as a dig site?
No. GPR survey pages document survey work and interpretation limits, not automatic excavation. A survey record can be confirmed while its footprint stays approximate, withheld or absent. Read the method, the named report and the stated limit before treating a radar page as an excavation target.
Should a withheld location be reconstructed from the story?
No. A withheld location is a publication decision, not a puzzle. Do not invent coordinates, average nearby landmarks or treat a broad place name as a precise fix. If the public evidence is incomplete, leave the gap visible. Confidential positions belong with the official reporting route, not in a reconstructed pin.
Does a public symbol mean fieldwork is allowed?
No. Map publication does not supply access, consent, a licence or any other authority. Detecting, excavation, survey and diving each have their own official requirements. Use the law and reporting page as a route to current legislation and guidance, and check ownership and site notices before any field activity.
Use the framework
Follow the compliance path
Open law and reporting when you need the official rules rather than a story. The page points to current legislation, heritage guidance and the separate routes for archaeological objects and wreck material, without treating a place page as authority to act.