Open Topographic Lidar Data

Theme: Science
Views: 18436
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LiDAR (Light Detection and Ranging) is a remote sensing technology, i.e. the technology is not in direct contact with what is being measured. From satellite, aeroplane or helicopter, a LiDAR system sends a light pulse to the ground. This pulse hits the ground and returns back to a sensor on the system. The time is recorded to measure how long it takes for this light to return. Knowing this time measurement scientists are able to create topography maps.

LiDAR data are collected as points (X,Y,Z (x & y coordinates) and z (height)). The data is then converted into gridded (GeoTIFF) data to create a Digital Terrain Model and Digital Surface Model of the earth. This LiDAR data was collected between 2015 and 2020.

Digital Terrain Models (DTM) are bare earth models (no trees or buildings) of the Earth’s surface.

Digital Surface Models (DSM) are earth models in its current state. For example, a DSM includes elevations from buildings, tree canopy, electrical power lines and other features.

This data was collected by the Geological Survey Ireland, the Department of Culture, Heritage and the Gaeltacht, the Discovery Programme, the Heritage Council, Transport Infrastructure Ireland, New York University, the Office of Public Works and Westmeath County Council. All data formats are provided as GeoTIFF rasters but are at different resolutions. Data resolution varies depending on survey requirements. Resolutions for each organisation are as follows:

GSI – 1m

DCHG/DP/HC - 0.13m, 0.14m, 1m

NY – 1m

TII – 2m

OPW – 2m

WMCC - 0.25m

Both a DTM and DSM are raster data. Raster data is another name for gridded data. Raster data stores information in pixels (grid cells). Each raster grid makes up a matrix of cells (or pixels) organised into rows and columns. The grid cell size varies depending on the organisation that collected it. GSI data has a grid cell size of 1 meter by 1 meter. This means that each cell (pixel) represents an area of 1 meter squared.

Data Resources (3)

DATA DOWNLOAD
available as data download
ESRI REST
available as esri rest
ESRI REST
available as esri rest

Data Resource Preview - ESRI REST

Theme Science
Date released 2018-05-01
Date updated 2021-10-22
Dataset conforms to these standards The INSPIRE Directive or INSPIRE lays down a general framework for a Spatial Data Infrastructure (SDI) for the purposes of European Community environmental policies and policies or activities which may have an impact on the environment.
Rights notes {"Creative Commons Attribution 4.0 International (CC BY 4.0)","Data that is produced directly by the Geological Survey Ireland (GSI) is free for use under the conditions of Creative Commons Attribution 4.0 International license. https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/legalcode Under the CC-BY Licence, users must acknowledge the source of the Information in their product or application. Please use this specific attribution statement: \"Contains Irish Public Sector Data (Geological Survey Ireland) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence\". In cases where it is not practical to use the statement users may include a URI or hyperlink to a resource that contains the required attribution statement.",license,"Data that is produced directly by the Geological Survey Ireland (GSI) is free for use under the conditions of Creative Commons Attribution 4.0 International license. https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/legalcode Under the CC-BY Licence, users must acknowledge the source of the Information in their product or application. Please use this specific attribution statement: \"Contains Irish Public Sector Data (Geological Survey Ireland) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence\". In cases where it is not practical to use the statement users may include a URI or hyperlink to a resource that contains the required attribution statement.",license}
Update frequency Continuously updated
Language English
Landing page https://secure.dccae.gov.ie/arcgis/rest/services/Groundwater
Geographic coverage in GeoJSON format {"type":"Polygon","coordinates":[[[-10.55, 51.4],[-10.55, 55.28847], [-5.33, 55.28847], [-5.33, 51.4], [-10.55, 51.4]]]}
Spatial Reference Systems (SRS) Irish Transverse Mercator (ITM, EPSG:2157)
Vertical Extent {"maxVerticalExtent": "1039", "verticalDomainName": "Malin Ordnance Datum", "minVerticalExtent": "0"}
Provenance information Consistent
Period of time covered (begin) 2015-01-01
Period of time covered (end) 2020-01-31

Comments [4 ]


Error Created 05.10.2022 23:09

I also get the same error. Data cannot be added to the maps.

Error Created 12.18.2021 09:14

I also get the same error. Data cannot be added to the map.

I get this error in the Open Topographic Data Viewer Created 12.17.2021 20:27

The layer, Photogrammetry Coverage Overview (GSI), LIDAR Coverage (OPW Cork), LIDAR Coverage (OPW NASC), LiDAR Coverage (WMCC), Lidar Coverage (TII), LIDAR Coverage NYU, LIDAR Coverage GSI Phase2, LIDAR OPW Coverage, LIDAR Coverage Overview (GSI,DCHG, DP), Photogrammetry Data Index (GSI), LIDAR Index (OPW Cork), LiDAR Index (OPW NASC), LiDAR Index (WMCC), Lidar Data Index (TII), Lidar Data Index NYU, Lidar_Data_Index_GSI_Phase2, Lidar OPW Index, Lidar Data Index (GSI,DCHG,DP), cannot be added to the map.  

Open Lidar Data for Abbeyleix Created 05.20.2021 20:35

When I try to download Lidar data for Abbeyleix bog and Dun Alainne outside Kilcullen the system does not work. I have no problem downloading TII data along motorways. Any assistance appreciated.