Guardian Stone, Knowth (3D model)
There are more than 300 decorated stones in the great tombs of Knowth, the greatest concentration of megalithic art in Europe. Some of the more dramatic designs are on the orthostats in the passages at the approach to the chambers.
Orthostat 49; also known as the Guardian Stone, is situated in the eastern passage tomb at Knowth. The stone is decorated with an anthropomorphic figure.
SMR No.: ME019-030001-
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Metadata
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Information
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Source
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The Discovery Programme |
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Contacts
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Mr Anthony Corns
Technology Manager
The Discovery Programme
63
Merrion Square
Dublin
D2
Dublin
Dublin
Ireland
+353 1 639 3039
+353 1 639 3710
info@discoveryprogramme.ie
The Discovery Programme
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Copyright Credit Line
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Copyright © The Discovery Programme |
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Europeana Rights
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Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND) |
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Spatial
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Guardian Stone (Orthostat 49) Eastern Tomb, Knowth
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Protection Type
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National Monuments in State Care |
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Start Date
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-4000 |
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End Date
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-2500 |
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Period Name
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Neolithic Period |
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Materials
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Stone |
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Heritage Asset Type
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Megalithic Art |
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Metadata
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Information
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Thumbnail
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Name
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3D Model of Guardian stone, Knowth |
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Description
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3D Model of Guardian stone, Knowth |
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Type
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3D |
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Format
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webGL |
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Extent
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11.77mb |
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Copyrights
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Copyright © The Discovery Programme
Creative Commons - Attribution, Non-Commercial, No Derivatives (BY-NC-ND)
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Link
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Landing Page
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Metadata
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Information
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Name
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Close Range Scanning, Knowth |
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Description
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The Artec EVA scanner is used to generate high resolution models of surfaces with small scale detail. The Artec EVA uses structured light to record. A forensics tent is used to create a controlled lighting environment and ensure measurement can proceed regardless of the weather when used outdoors. Scanning is undertaken with the fastest speed setting (15 frames per second) and with a minimum 400 mm depth of field. The data is recorded with sufficient overlap between scans to ensure easy registration.
Resolution 0.5 mm
Accuracy 0.1 mm
Accuracy over distance 0.03% over 100 cm
Texture Resolution 1.3 mp
Colours 24 bpp
Light Source flash bulb (no laser)
Video frame rate 16 fps
Exposure time 0.0002 s
Post-processing is done in Artec Studio 9 software: individual scans are edited, aligned, before a final surface is generated using global registration, fusion, and a small objects filter algorithm. If required, a textured surface can also be created. The model is exported from Artec Studio 9 as an .obj file. For dissemination purposes a 3D pdf of the model is generated using Geomagic Studio 2012. |
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Purpose
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Measured Survey |
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Equipment
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Artec EVA ,HP Computer,Artec Studio 9.2,HP Computer |
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Actor
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Gary Devlin, Individual, Geo-surveyor |
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Actor
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Robert Shaw, Individual, Senior Geo-surveyor |
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Actor
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Patrick Griffin, Individual, 3D Modeller |
