Description
SMR No.: GA110-039----
Monument Type: Promontory fort - coastal
Perched at edge of the sheer sea-cliffs on SW side of Inis Mór, Dún Aonghasa, which is a National Monument, is an extensive cliff-top fort, roughly D-shaped in plan.
Dun Aonghasa has an area of almost 6 hectares (14 acres). Three curvilinear walls divide the interior into an outer, middle and inner enclosure; all the enclosing walls terminate at the cliff edge. An additional stretch of wall on the western side appears now to be ‘hanging in space‘ but it must have been an integral part of the defences at one time.
Outside the middle enclosure is a cordon of close-set stone pillars (known as a chevaux de frise). Even today it is very difficult to pass through this barrier.
The original approach to the fort was from the north, parallel to the limestone terraces, and the earliest entrances in the outer and middle walls face in this direction. The modem route (from the north-east) may date back to the Early Medieval period when there was a monastery atthe bottom of the hill where the Visitor Centre now stands.
Licensing
All 3D models, videos and images of this cultural heritage object/site are the copyright of the Discovery Programme and can be licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
High Resolution Data
For access and reuse of the high resolution 3D survey data used to derive the online models, images and videos please contact This email address is being protected from spambots. You need JavaScript enabled to view it..
Technical Details
3D Capture Method: Terrestrial laser scanning (TLS)
3D Capture Description: Phase based terrestrial laser scanning using a Faro Focus 120 laser scanner. The instrument quotes the following specification:
- Distance accuracy up to ±2mm.
- Range from 0.6m up to 120m.
- Measurement rate up to 976,000 points/sec.
- Intensity & RGB. Integrated colour camera.
- Photorealistic 3D colour scans with up to 70 megapixels.
- Parallax-free colour overlay.
Laser scans geo-referenced using RTK GPS with VRSnow corrections
Data Processing Software
Processing of point cloud data: Faro Scene & Pointools
Meshing of data: Geomagic Studio 2012
3D Modelling & Texturing: Autodesk Mudbox, Mari, 3D Studio Max