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OHM WORKSMEASURE · ANALYZE · DECIDE
Palais Royaux d'Abomey, site classé UNESCO — relevé patrimonial OHM WORKS
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Heritage Conservation

OHM WORKS documents, measures and models heritage sites for authorities, conservators, researchers and cultural institutions. Our flagship reference: the full LiDAR survey of the Royal Palaces of Abomey, a UNESCO-listed site, over 100 hectares for the National Tourism Heritage Promotion Agency (ANPT).

Royal Palaces of Abomey surveyed
100 ha
Z-axis accuracy
< 5 cm
UNESCO-listed sites
UNESCO

Applications

  • Under-canopy LiDAR surveys

    High-density acquisition penetrating vegetation and tree cover — suited to archaeological sites, listed gardens and partially buried architectures.

  • Photogrammetric 3D modeling

    High-resolution textured mesh for museum documentation, scientific communication and public outreach.

  • Conservation digital twin

    Geometrically exact replica of the site for restoration planning, intervention simulation and team training.

  • Heritage documentation

    Digital cadastral plans, elevations, sections and georeferenced cataloging — deliverables compliant with international archival standards.

  • Degradation monitoring

    Repeated surveys to measure erosion, collapse and structural losses over time — basis for prioritizing emergency interventions.

  • Museographic restitution

    Immersive media (VR, AR, web 3D) generated from the models, for cultural mediation on site or online.

Our method

A proven three-step protocol, from technical brief to delivery of usable data.

  1. 01Step 1

    Brief & permits

    Scoping with conservators and authorities (ANPT in Benin, Historic Monuments in France), UNESCO clearance for listed sites, access and occupation constraint analysis.

  2. 02Step 2

    Combined acquisition

    LiDAR + high-resolution photogrammetry as the site requires. RTK-located GCP targets, maximum overlap to preserve detail. Stable-weather flight, outside public visiting hours.

  3. 03Step 3

    Museographic deliverables

    Classified point clouds, high-resolution textured mesh, technical plans, archival metadata, long-term archive. CIPA and CIDOC-CRM standards.