Practice with mock tests, learn from structured notes, and get your questions answered by a global forensic community, all in one place.
Forensic site photography applies strict technical standards (scale bar, north arrow, colour checker, RAW capture) to produce photographs that are both an interpretive record and a legal exhibit, while hand-drawn context plans and section drawings capture the spatial relationships that a photograph alone cannot communicate.
Last updated:
A photograph is simultaneously the most powerful and the most misused record in forensic archaeology. Its power is that it captures a moment in three dimensions with a fidelity that no drawing can fully replicate. Its weakness is that it is easy to take badly, easy to manipulate, and easy to misread without context. A photograph of a grave fill taken without a scale bar is not a forensic record. A photograph without a file-hash and a photographic log may be challenged as unverified in court.
Forensic photography at a burial scene is governed by specific technical standards that differ from crime-scene photography mainly in the additional complexity of a three-dimensional stratigraphic context. An exposure photograph shows a context surface at a defined stage of excavation. A detail photograph records a find or feature in its pre-disturbance position. An overview photograph situates a grave within its surrounding terrain. Each type requires a scale bar, a north arrow, a colour checker, and a photographic log entry that links it to the context recording system.
Alongside photography, hand-drawn plans and section drawings remain essential. A plan shows horizontal extent and spatial relationships at a scale that photographs distort through lens geometry and perspective. A section drawing captures the vertical stratigraphic sequence in a way that even a photogrammetric model cannot communicate as clearly as a drawn, labelled diagram. This topic covers both modes of recording, their technical standards, and how they combine to form the legal site archive.
A photograph missing any one of four elements may not survive cross-examination.
The four elements that forensic site photography demands can be remembered as SNCR: scale, north arrow, colour checker, RAW. Each has a specific evidential function. Together they make the photograph interpretable, measurable, colour-calibrated, and preserving of original data. The absence of any one element is a technical deficiency that an opposing expert or a judge can note.
Context-level, overview, and detail shots serve different evidential purposes.
A systematic photography protocol distinguishes three levels of shot, each with a defined purpose in the site record. All three levels are taken at each significant stage of the excavation, not just at the end.
| Shot type | Purpose | Typical framing |
|---|---|---|
| Overview | Places the grave or scene within its surrounding environment; shows the spatial relationship between features at site scale | Wide angle, taken from an elevated position (step ladder, monopod at full extension, or drone); entire site visible with surrounding terrain |
| Context-level | Records each context surface (cut outline, fill layer, skeleton) at the moment of exposure, before any material is removed | Full context in frame; scale bar and north arrow visible; camera held vertically above the context floor |
| Detail | Documents a specific find, feature, trauma, or association in close-up | Subject fills most of the frame; scale bar in the same plane as the subject; view direction noted |
A common error is to take only the context-level shot and omit the detail shots for small finds or bone trauma. Once the element is lifted and bagged, a photograph showing its in-situ relationship to adjacent material is gone. The protocol should specify that every registered find receives both a context-level shot (showing its position in the context) and a detail shot (showing its surface characteristics).
A digital file with no paper trail is not an exhibit.
Every photograph taken at a forensic site generates two records: the digital image file and a photographic log entry. The log entry is the link between the image and the context recording system. Without it, a court looking at a photograph cannot be sure when it was taken, by whom, what context it represents, or whether it is the original unaltered file. The log is kept on paper during fieldwork and incorporated into the digital site archive during post-excavation processing.
Chain of custody for digital images follows the same logic as chain of custody for physical exhibits. The camera card is treated as primary evidence. Images are copied (not moved) from the card to a designated evidence drive immediately after each session. The card is retained or written-protected. A hash value, typically SHA-256, is generated for each image file at the point of ingestion. The hash is recorded in a transfer log alongside the file name, date, time, and operator. Any future copy of the file can be re-hashed and compared to the original hash to confirm the file has not been altered.
Drawing enforces observation. A drafter who draws a context boundary must look at it hard enough to put it on paper.
A context plan is a hand-drawn record of the horizontal extent and surface features of one context, made at 1:10 or 1:20 on film drawing film or waterproof paper, with a fixed north arrow and the context number, site code, date, scale bar, and drafter's initials on the sheet. It documents the shape, extent, and visible characteristics of the context surface at the precise moment of recording, before any further excavation changes it.
The vertical sequence is invisible from above. A section drawing is the only way to record it.
A section drawing documents the vertical stratigraphic profile exposed when an excavated trench or grave is cut through and the side walls cleaned back to expose the layers. It is the primary record of the relative age of contexts (which layer cuts or seals which), the depth and angle of fills, and the relationship between the grave and surrounding natural or made ground.
A horizontal datum string is stretched across the top of the section at a known height. The section drawing is referenced to this string: all vertical measurements are taken downward from it. The horizontal extent is measured along the base of the section or by total station. Drawing film is clipped to a drawing board and a grid may be pre-printed at 1:10 to speed plotting. Each context in the section is given its context number, described in the written record, and its boundary is drawn as precisely as cleaning and observation allow.
EXIF data is free evidence. Use it, verify it, and preserve it.
Every digital image file produced by a camera contains EXIF metadata embedded in the file: camera make and model, lens focal length, aperture, shutter speed, ISO, date and time, and if a GPS-capable camera was used, coordinates. This metadata is part of the evidential content of the image. Courts increasingly ask for the EXIF data to confirm that the stated date and time of photography are consistent with the file.
Before a forensic operation begins, the camera clock should be synchronised to a time source of known accuracy (a GPS time signal or a reference clock) and the synchronisation noted in the photographic log. If the camera clock later proves to have been wrong, the discrepancy can be applied as a uniform correction to the timestamps, but only if the synchronisation record exists.
Why must the scale bar be placed in the plane of the subject rather than simply visible somewhere in the frame?
Test yourself on Forensic Archaeology with free, timed mocks.
Practice Forensic Archaeology questionsSpotted an error in this page? Report a correction or read our editorial standards.