Aerial laser scanning (ALS) data collected over an area of around 1 square km in Dublin city in 2007 (see satellite image). A total of ~225 million points were acquired for a dense urban neighbourhood. ALS was carried out by contractors using FLI-MAP 2 system. The system operated at a scan angle of 60 degrees, with an angular spacing of 60/1000 degrees between pulses. The FLI-MAP 2 system also provides spectral data in two different forms: (i) intensity and (ii) colour. An intensity value is provided for each point while colour information is provided by cameras acquiring images during the flyover and is transferred to scan points. The flying altitude varied between ~380-480m, with an average value of ~400m. Total 44 flight strips were acquired and 2823 flight path points were recorded, providing instantaneous aircraft position over time.

Aerial photograph of Loreto Abbey, Rathfarnham showing the farm yard (upper right hand corner of photograph, marked with an x). The Annals Loreto Abbey Rathfarnham 1913-1916 refer to two workmen employed on this farm who participated in the rising. The height from which the photograph was taken is noted as 1,000 feet. The date and title are also written on the verso of the photograph, along with the following note 'farmyard to the right where Stonepark Abbey houses are being erected 1989-1990'.

Postcard of the altar in Loreto College, 53 St Stephen’s Green. The postcard was commercially produced c. 1930’s, but the building was little altered from 1916.

This collection contains files which describe the construction and evolution of Balbriggan Harbour, County Fingal, from its earliest structure to its current form.

PDF poster with historical summary, plan view of LiDAR scan data, and perspective image for Balbriggan Harbour.

This collection contains files which describe the construction and evolution of Boat Strand Harbour, County Waterford, from its earliest structure to its current form.

PDF poster with historical summary, plan view of LiDAR scan data, and perspective image for Boatstrand Harbour.

This collection contains files which describe the construction and evolution of Bullock Harbour, County Dublin, from its earliest structure to its current form.

PDF poster with historical summary, plan view of LiDAR scan data, and perspective image for Bullock Harbour.

Amended printed drawing issued in Dec 1840 as the vane was considered too large. As with the original, this vane was to be of 'strong copper'. Castleblayney Union Workhouse is now part of St. Mary's Hospital.

Printed section through central section of main block. Castleblayney Union Workhouse is now part of St. Mary's Hospital.

Hand-drawn sections through laundry. Castleblayney Union Workhouse is now part of St. Mary's Hospital.

Hand-drawn sections through dining hall/chapel. Castleblayney Union Workhouse is now part of St. Mary's Hospital.

Postcard of the concert hall in Loreto College, 53 St Stephen’s Green. Commercially produced c. 1930’s, but building was little altered from 1916.

A corridor in Loreto College, St. Stephen's Green, Dublin. The corridor is mentioned in the Annals Loreto College 53 St Stephen’s Green 1914 - 1918 (SSG/3).

Postcard of the entrance hall in Loreto College, 53 St Stephen’s Green. The postcard was commercially produced c. 1930’s, but the building was little altered from 1916.

This collection contains files which describe the construction and evolution of Fethard Harbour, County Wexford, from its earliest structure to its current form.

PDF poster with historical summary, plan view of LiDAR scan data, and perspective image for Fethard Harbour.

Full-size profile of bricks for string course and label molding over door and windows at front entrance.

Postcard of the hard tennis court in the grounds of Loreto College, 53 St Stephen’s Green. The postcard was commercially produced c. 1930’s, but the grounds were little altered from 1916.

Postcard of the grounds of Loreto College, 53 St Stephen’s Green. The postcard was commercially produced c. 1930’s, but the grounds were little altered from 1916.

Postcard of the grounds and tennis courts of Loreto College, 53 St Stephen’s Green. The postcard was commercially produced c. 1930’s, but the grounds were little altered from 1916.

Printed interior perspective of main block shewing the construction arrangements of the sleeping platforms and Bedsteads. This copy of the interior view is from the documents relating to Lismore Workhouse.

Postcard of the library in Loreto College, 53 St Stephen’s Green. The postcard was commercially produced c. 1930’s, but the building was little altered from 1916.