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GIS at UCD and on the Web: LiDAR and Remote Sensing data

UCD Library GIS Guide

LiDAR Mapping Data

LiDAR is a scanning system attached to the underside of a low-flying aircraft in order to pulse laser light at the surface of the Earth. This light is reflected back up to the system, where it is measured, creating a reliable reading of the 3D shape of the ground below.

The LiDAR data for part of Dublin comes in two maps. The areas can be viewed on this image here.

 

This mapping is Bare Earth filtered data, mapped by surveyors and omitting buildings and other topography. This provides bare ground topography, useful for getting an overview of the contours of an area, but not providing details of height of buildings.

Remote Sensing Data

UCD School of Geography has remote sensing images for Dublin purchased from BlueSky with the following specifications:

 

12.5cm 4 band in GeoTIFF (red, blue, green, infrared)
1m DSM in .asc format (digital surface model)
1m DTM in .asc format (digital elevation model)
1m TIR data in GeoTIFF (thermal imagery for mostly Inner City Dublin)

All data is in ITM95 projection

To find out about accessing this data please contact Mr Tine Nagel at tine.nagel@ucd.ie

2015 Dublin LiDAR

LiDAR Suppliers