Description
SMR No.: ME019-045----
Monument Type: Megalithic tomb - passage tomb
Newgrange (Ir. Sí an Bhrú), the best known Irish passage tomb, is surrounded by a kerb of 97 stones, the most impressive of which is the highly decorated Entrance Stone. The mound covers a single tomb consisting of a long passage and a cross-shaped chamber. There are the remains of two smaller tombs immediately to the west of Newgrange and at least one and probably two to the east.
Newgrange was excavated between 1962 and 1975 by Professor M. J. O’Kelly who discovered the Roof Box through which the mid-winter sun penetrates into the chamber. Based on archaeological evidence, he also designed the reconstruction of the white quartz façade. Newgrange as the main síd of the Boyne Valley was regarded in Irish mythology as the residence of Aonghas, son of the great god Daghda.
Technical Details
3D Capture Method: Aerial Lidar
3D Capture Description: The Optech ALTM 3100 has high scanning frequency of 100,000 Hz to allow the collection of both high-resolution data for detailed surveys and highly efficient collection of lower resolution data for broad scale flood plain mapping.
The ALTM 3100 instrument is mounted on a fixed wing platform leased 365 days per year by the Agency as it forms the core mapping work undertaken. This system will be used for the proposed contract. LIDAR data will be collected at an altitude of approximately 900m, which with a scan angle of +/- 20º will result in a swath of 750m. LIDAR data will be collected at a density of approximately 1m resolution or one point per square metre
LIDAR data has a vertical RMSE of 15cm or better. The manufacturer's quoted accuracy of the ALTM LIDAR system is +/- 15cm in z.
Resulting data sets include first return (DSM) and last return point (DTM, bare earth) models
Data Processing Software: ArcGIS & Geomagic Studio
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