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The best tools for documenting an artifact in place are a metric archaeological photo scale, a camera with macro capability, a stable support, a colour-control chart, a project-approved location system, and a written field record. Used together, they capture appearance, scale, position, relationships and handling context before disturbance. The correct sequence is more important than any brand: pause, follow the site’s permits and procedure, photograph the find where it lies, record its context and identifier, then add measurements or 3D data when the project requires them.
This guide is for archaeologists, students and heritage field staff. It treats tools as aids to a recording system—not substitutes for specialist judgement, conservation advice, archive requirements or local law.
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| Name | Best for | Key spec | Checked |
|---|---|---|---|
| Metric archaeological photo scale bar | Showing size in close and context photographs | Graded metric graduations; choose millimetre, centimetre or larger scale to suit the view | November 2026 |
| Camera with macro capability | Recording overall context and diagnostic surface details | Macro facility for close-ups; retain original files and metadata | November 2026 |
| Tripod or other stable support | Long exposures and consistent, sharp views | Stable support suited to the terrain and camera | November 2026 |
| Colour-control chart | Colour-critical interpretation and archiving | Colour balance reference included in the relevant frame | November 2026 |
| GPS/GNSS or project survey system | Connecting a find to a measured location | Accuracy and coordinate format set by the project recording system | November 2026 |
| Field notebook and approved forms | Context, observations, identifiers and decisions | Project-specific fields for site, context, find, time, photographer and relationships | November 2026 |
| Photogrammetry or 3D scanning setup | Scaled geometry of units, features or objects | Use only when the project can capture, process, document and preserve the data | November 2026 |
Why must documentation come before moving an artifact?
Because removal can destroy information that cannot be reconstructed later. The US Navy’s Methods and Guidelines for Archaeological Fieldwork states: “Thorough documentation should precede any form of site disturbance including recovery.” That is institutional guidance, not a quotation attributed to an individual. The principle applies especially to fragile objects, but it is a sound default for every find unless an approved emergency or conservation procedure says otherwise.
An in-situ record can preserve more than an object’s appearance. Historic England’s recording manual explains that such images may show an unstable object before it disintegrates, its relationship to strata and associated finds, depositional conditions, and the methods later used to conserve, handle or lift it. Once an object is moved, those relationships may be altered or lost.
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Think of the record as a linked set rather than a single photograph:
- Appearance: shape, surface, colour, damage and visible construction details.
- Scale: a metric reference that makes dimensions interpretable.
- Context: the layer, feature, cut, structure or landscape position.
- Relationships: nearby objects, deposits, orientations and contacts.
- Location: coordinates, grid, survey point or other project reference.
- Identity: site, context, find, sample and image identifiers.
- Conditions: moisture, sediment, visibility, exposure and any immediate risk.
- Provenance of the record: who made it, when, with what equipment and under which project system.
No tool can restore an undocumented relationship after disturbance. Your project’s method statement, permit, chance-find plan and specialist advice always control what may be touched or removed.
Which tool is the most important?
For straightforward in-situ photography, choose a metric archaeological photo scale bar with clear graduations. It is the simplest way to make a photograph measurable, provided it is positioned without obscuring the find or changing the context.
Use a scale suited to the view. Historic England calls for a suitable-sized scale bar and a colour-balance chart in the described recording approach. The NSW code of practice specifies graded metric scales: millimetre or centimetre graduations for macro work and larger scales for context views.
When selecting a scale, check:
- Graduation: metric markings that match the dimensions your project records.
- Legibility: numerals and lines must remain readable at the intended image size.
- Length and format: a small bar for close-ups and a larger one for broader views may be necessary.
- Durability: the material should tolerate the site’s moisture, dirt, handling and cleaning protocol.
- Compliance: use the style and colour convention required by the project or archive.
A scale bar is not a substitute for written measurements where the method requires them. It also does not correct perspective distortion if the scale and object are on different planes.
What should the camera record?
Use a camera system that can make both a clear context image and detailed close views. Historic England specifically discusses a camera’s macro facility for close-ups; the guidance does not endorse a particular brand or model.
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Context views
Start wide enough to show where the artifact sits in its feature, layer or landscape. Include stable reference points and the project scale where appropriate. A context frame should let another team member understand the find’s position without relying on memory or a later cleaned-object photograph.
Close views
Move to closer frames for diagnostic surfaces, joins, markings, tool traces, damage or unstable areas. Keep the camera parallel to the most important plane when documenting shape or decoration, and make separate views when one angle cannot show all relevant details. Do not sacrifice the context image for a more attractive close-up.
Tripod and stability
A tripod or other stable support is useful when light is low, depth of field demands a smaller aperture, or a sequence of images must remain consistent. Historic England includes tripod use in its recording guidance. On uneven ground, place the support where it will not compress deposits or disturb the object, and follow the site’s access rules.
Colour reference
Include a colour-control chart when colour affects interpretation, conservation or the archive. Photograph it under the same lighting as the object and avoid placing it where it hides a significant edge or relationship. A colour chart supports later interpretation; it does not make uncontrolled lighting conditions equivalent to a laboratory record.
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Use this sequence as a field checklist, adapting the fields and order to the approved project method.
- Pause and establish authority. Stop before lifting, cleaning, rotating or probing the object. Check the excavation plan, permit, chance-find procedure and any conservation direction. The UNESCO-hosted chance-find guideline makes removal subject to authorization in its project context; do not assume that authority chain applies unchanged in another jurisdiction.
- Make the overall context image. Photograph the object as found, showing its position in the feature, deposit or landscape. Record the view direction and enough surrounding information for the frame to be located later.
- Place the metric scale carefully. Choose millimetre, centimetre or larger graduations for the image’s purpose. Keep the scale in the same plane as the object when possible, and do not move deposits merely to make it fit.
- Add a colour reference when needed. Use the project’s colour chart or balance reference when colour is significant. Note unusual lighting, wetness, shadow or other conditions that could affect interpretation.
- Take diagnostic close-ups. Use macro capability for surfaces, inscriptions, joins, edges and damage. Make more than one orientation when a single view cannot represent the relevant geometry.
- Write the record while the context is visible. Enter the project and site, context or feature, find or sample number, date and time, photographer, subject, view direction, location reference, measurements and relationships to associated deposits or objects. The UNESCO-hosted guidance lists photographs at the discovery point, time/date stamps, GPS points and, depending on the find, measurements or drawings in situ.
- Add a sketch, profile or 3D capture if it answers a defined need. A drawing may clarify contacts and orientation more efficiently than another photograph. Photogrammetry or scanning can add scaled geometry, but only when the project can process, document and preserve the resulting data.
- Link and verify. Check that image filenames, notebook entries, survey points and find identifiers all refer to the same context. Retain original files and make backups before proceeding with disturbance.
How should I record location and relationships?
Use the project’s established survey system rather than treating a consumer location reading as automatically survey-grade. Record the coordinate or survey reference, coordinate format, datum or grid information required by the project, and the precision that the method supports.
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Location is only one part of provenience. Also describe:
- the context, layer, cut, structure or feature number;
- the object’s orientation and depth or elevation where required;
- contacts with adjacent deposits;
- nearby finds, samples, inclusions or deliberate arrangements;
- visible disturbance, erosion, water movement or modern intrusion;
- the direction of each photograph and the position of the scale.
A measuring tape, ruler or survey staff can support dimensions, but it must be used in the way specified by the recording system. A field sketch can show relationships that a coordinate alone cannot: for example, whether an object lies across a boundary, rests on a surface or is embedded in a deposit.
North Carolina’s terrestrial field methodology describes structure-from-motion photogrammetry for scaled models of excavation units and features. Such a model supplements measured plans, sections and written context; it does not remove the need for them.
Should I clean, rotate or lift the find before photographing it?
Not automatically. The correct sequence depends on the material, stability, context, conservation risk and approved project method.
CIfA’s finds-recording guidance distinguishes plotted finds recorded in situ from the broader finds workflow, in which many objects are recorded after cleaning, drying and marking. It also emphasizes recording what is known and updating the record as identification improves. That is compatible with a cautious rule: make the in-situ record before any action that could alter the evidence, then follow the project’s handling and conservation instructions.
Do not wash, brush, scrape, turn or lift an object simply to produce a better-looking photograph. Historic England’s emphasis on fragile or unstable finds is a reminder that handling can destroy the very evidence the image is meant to preserve. If an object is collapsing, exposed to water or at immediate risk, call the responsible supervisor or conservator and document the intervention as part of the record.
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When is photogrammetry or 3D scanning worth adding?
Add 3D capture when geometry, volume, spatial relationships or repeatable measurement are important and the project has a complete workflow for it. The US Navy guidance lists photogrammetry and 3D scanning/modeling alongside traditional measurements; North Carolina guidance describes structure-from-motion models for units and features.
Before choosing a 3D method, confirm:
- what question the model will answer that photographs, drawings or measurements do not;
- how scale will be established and checked;
- how lighting, overlap and access will be controlled without disturbing the context;
- which original photographs, calibration data, processing settings and software versions must be archived;
- where the final model and raw data will be stored, with stable identifiers linked to the context record.
A mesh without its source photographs, scale information and processing record may be difficult to interpret later. Treat 3D output as another documentary layer, not as a replacement for the required two-dimensional record.
What should a complete field record contain?
The archaeological record extends beyond the object. The US Navy guidance calls for originals and backup copies, while the Canadian Conservation Institute explains that notes, photographs, analyses and reports connect an object to its historical context and the rest of the site.
At minimum, assemble the project-required set of:
- original context and close-up photographs;
- image filenames and a log linking them to site, context and find identifiers;
- field notes, forms and sketches;
- maps, plans, profiles and survey data;
- measurements and, where used, drawings or 3D data;
- observations about material, condition, stability and depositional setting;
- handling, conservation or lifting decisions and who authorized them;
- raw and processed remote-sensing or photogrammetry data where applicable;
- backup copies stored according to the project and archive plan.
Keep the original image files. Do not rely only on resized exports, screenshots or edited versions. If files are renamed or converted, preserve a cross-reference to the camera filename and record the change in the project system.
Which tool kit fits different field situations?
| Situation | Minimum useful kit | Add when the project requires it |
|---|---|---|
| Small, stable find in an excavation unit | Camera, metric close-up scale, notebook or form, context identifier | Tripod, colour chart, survey reference |
| Fragile or unstable object | Context camera, scale, written record, supervisor or conservator direction | Additional lighting, rapid documentation plan, condition photographs |
| Large feature or landscape find | Wide camera view, larger metric scale where appropriate, survey system, sketch | Photogrammetry, measured plan and profile |
| Colour-critical material | Camera, scale and colour-control chart | Controlled lighting and conservation documentation |
| Wet, underwater or difficult-access context | Approved site-specific camera and recording method, location reference, written log | Specialist lighting, photogrammetry or remote documentation |
Details checked November 2026.
The table is a planning aid, not a universal protocol. Underwater, protected, Indigenous heritage and chance-find work can impose additional permissions, consultation and recording requirements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How should I choose between competing tools?
Choose the tool that captures the evidence your project actually needs and integrates with its archive. Compare options on five axes:
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- Evidence captured: appearance, scale, location, geometry or written context.
- Required accuracy: the tolerance specified by the method, not a marketing label.
- Field conditions: water, dust, low light, temperature, access and portability.
- System compatibility: identifiers, coordinate formats, file types and archive requirements.
- Preservation: originals, metadata, calibration information, processing history and backups.
The supplied guidance does not establish a universally best camera, GPS receiver, scale manufacturer or photogrammetry package. A durable, legible scale that matches the project standard is generally more valuable than an elaborate accessory that cannot be linked to the site record.
What mistakes most often weaken an in-situ record?
- Photographing only after removal: fix this by making a context frame before lifting or cleaning.
- Using no scale or the wrong scale: select graduations appropriate to macro or context views.
- Putting the scale on a different plane: reposition it without disturbing deposits, or make the limitation explicit.
- Leaving out identifiers: link the image, note, survey point and find number before moving on.
- Relying on coordinates alone: add relationships, orientation, depth or elevation and a sketch where required.
- Editing away the original: preserve camera originals and document derivatives.
- Assuming 3D replaces standard records: retain required plans, sections, photographs and written context.
- Handling a fragile object for appearance: seek specialist direction and record any intervention.
- Ignoring jurisdiction: verify local permits, archive rules, Indigenous heritage requirements and chance-find procedures.
What is a practical one-page recording checklist?
Before disturbance, confirm each item required by your project:
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- overall context photograph made;
- close-up and diagnostic photographs made;
- metric scale visible and appropriate;
- colour chart included when colour matters;
- site, context, feature and find identifiers recorded;
- date, time, photographer, subject and view direction recorded;
- coordinates or survey reference captured in the project format;
- measurements, sketch, profile or 3D capture added where needed;
- relationships to deposits and associated finds described;
- condition and stability noted;
- image files checked against the written record;
- originals and backups secured.
Once those checks are complete, proceed only with the handling, conservation and recovery method approved for the site. Update the identification and interpretation as new evidence becomes available; the first field description is not necessarily the final one.
How we selected these tools
The selection follows the evidence needs identified in the cited guidance: preserving appearance and context before disturbance, making photographs measurable, recording location and relationships, supporting written and graphic records, and retaining originals and backups. Tools were not ranked by brand, consumer popularity or unpublished performance. Their value depends on the project’s required accuracy, conditions, permissions and archive workflow.
Frequently Asked Questions
Can a phone replace a dedicated archaeological camera?
A phone may be suitable if the project accepts its image quality, metadata handling, lighting control and file-preservation workflow. The guidance requires a useful record, scale and context rather than a particular camera brand, so confirm the device and file process with the project director or archive before relying on it.
Do I need a separate scale for every artifact size?
Not necessarily, but one scale rarely works equally well for macro and broad context views. Keep graduations legible at the final image size and use the project’s specified metric formats; a close-up may need millimetres or centimetres while a feature view may need a larger graded scale.
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What metadata should be written down if the camera already stores it?
Camera metadata does not normally identify the archaeological context or explain relationships to nearby deposits. Record the project identifiers, context or feature, find number, location reference, photographer, subject, view direction and relevant observations in the approved log, then link the image filename to that entry.
Is a 3D model acceptable as the only record?
Usually it should be treated as a supplement, not an automatic replacement for required photographs, drawings, measurements and written context. Preserve the source images, scale information and processing record so another specialist can understand how the model was made.
