Archaeology & Heritage Documentation
Heritage documentation records a structure or site exactly as it stands, without touching it. Laser scanning and photogrammetry produce a millimetre-scale 3D record from which measured drawings, elevations, sections and condition maps are derived - the baseline that conservation decisions, restoration design and future re-assessment all work from.
Non-contact recording of structures and sites, with the point cloud retained as an archival record rather than discarded once the drawings are issued.
ALSO SEARCHED AS: heritage documentation · 3D scanning of monuments · archaeological survey · as-built heritage record · temple 3D scanning
What makes this work difficult
The constraints below decide the method. A quote that does not account for them is a quote that changes once the crew reaches site.
Nothing may be touched
Targets cannot be fixed to the fabric, and nothing can be moved for a clear line of sight. Registration has to work off natural features and free-standing targets, which changes how the scan positions are planned.
Geometry is irregular by nature
Heritage structures are not orthogonal. Walls lean, floors slope, and no two bays match. Drawings derived from assumptions rather than from measured section lines will be wrong in exactly the places conservation cares about.
Detail resolution decides everything downstream
Carving, moulding and tool marks only survive into the record if the scan resolution is set fine enough at capture. Resolution is a decision made on site that cannot be recovered afterwards.
Interiors are dark, cramped and reflective
Low light, tight spaces, polished stone and glass all degrade capture. Interiors need more setups, controlled photography for colour, and careful handling of reflective surfaces in the cloud.
How the survey is run
01
Recording brief
Agreeing what level of detail is being recorded and why - a condition baseline, a restoration design record and an archival survey demand different resolutions and different deliverables.
02
Control
A local control network around and through the structure so all scan positions, internal and external, resolve into one consistent coordinate system.
03
Scanning
Terrestrial laser scanning from overlapping positions covering exteriors, interiors, floors and ceilings, at the resolution the brief requires. Close-range photogrammetry adds fine surface detail on carved elements.
04
Aerial capture
Where roofs, upper elevations and site context are needed and airspace allows, drone photogrammetry completes the parts no ground setup can see.
05
Registration and processing
Scans registered into a single cloud with a stated registration accuracy, cleaned, and coloured from the photography.
06
Drawing extraction
Plans, elevations, sections and reflected ceiling plans cut directly from the cloud, so every line is a measurement rather than an interpretation.
What you receive
- Registered colour point cloud with registration report
- Measured plans at each level
- Elevations of every face
- Sections through the structure on agreed lines
- Reflected ceiling plans where relevant
- Orthographic imagery of elevations for condition mapping
- 3D mesh model for visualisation or fabrication
- Site topographic plan and context model
Instruments this work uses
Each links to a full guide - what the instrument does, how accurate it is and what drives its cost.
Standards, datums and regulation
Record the resolution and the accuracy
An archival record is only useful if a future user knows how good it is. State scan resolution at a reference distance, registration accuracy and control accuracy in the deliverable - an undocumented cloud cannot be trusted or extended later.
Protected monuments carry access rules
Sites protected under national or state heritage legislation require permission from the controlling authority before survey, and may restrict equipment, photography and aerial work. That permission is the site owner's to obtain and should be in place before mobilisation.
Archive formats outlive software
Deliver in open, long-lived formats - LAS or E57 for the cloud, DWG or PDF for drawings - alongside any proprietary project file. A record locked inside one vendor's format is a record with an expiry date.
Aerial work over heritage sites
Many heritage sites sit in restricted or no-fly airspace and additionally require the controlling authority's consent for aerial photography. To confirm: Axisline drone registration, remote pilot certification and the permission route used for protected heritage sites
What drives the cost
Heritage documentation is priced on the number of scan setups and the drawing schedule rather than on floor area, because an intricate small structure takes longer than a plain large one. The drivers are structure complexity, how much interior is in scope, the resolution required, and how many drawings are extracted from the cloud afterwards. To confirm: Axisline rate basis for heritage 3D documentation - per setup, per day or per structure
FAQ
Archaeology & Heritage surveys - common questions
How accurate is 3D laser scanning for heritage documentation?
Terrestrial laser scanning typically records surface geometry to a few millimetres at normal building distances, and registration between setups adds a small further error. That is fine enough to document cracks, deformation and carved detail. The limiting factor is usually registration quality across many setups rather than the accuracy of any individual scan.
Does laser scanning damage historic fabric?
No. Laser scanning is entirely non-contact - the instrument sits on a tripod and measures at a distance, with nothing attached to or removed from the structure. It uses eye-safe class laser light and leaves no residue or marking. This is precisely why it replaced hand measurement on sensitive fabric.
What drawings can be produced from a heritage scan?
Plans at each level, elevations of every face, sections on any line, reflected ceiling plans and orthographic elevation imagery can all be cut from a registered cloud. Because the cloud is a complete measured record, additional sections can be extracted later without revisiting the site - provided the original scan resolution supports the detail required.
Can archaeology below ground be surveyed without excavating?
Ground penetrating radar and related geophysical methods can indicate buried features such as walls, voids and disturbed ground without excavation. They detect contrast in subsurface properties, not objects directly, so results are interpretive and depend heavily on soil conditions. They guide excavation rather than replace it.
How long is a heritage scan record usable?
Indefinitely, if it is archived properly. Deliver in open formats such as E57 or LAS with documented control, resolution and registration accuracy, and store it alongside the drawings. A documented cloud can be re-interrogated decades later for questions nobody thought to ask when the survey was commissioned.
Related sectors
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