| snippet:
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LiDAR is important as it generates accurate measurements instantaneously. Knowing the height of the Earth’s surface is important for a number of reasons.
Landslides, small fault scarps, and other geologic features that are difficult to spot visually in the field or on aerial photographs can often be clearly shown on LiDAR images.
LiDAR data helps detect where flooding might occur. The risk of rivers flooding is linked to factors such as: climate, the material that makes up the banks of the stream, the channel slope and the topography. The LiDAR (topography) data enables more accurate mapping of where the water will flow.
LiDAR data helps planners to assess where to place new buildings; knowing the height of buildings, LiDAR can determine where shade will occur and where best to place solar systems.
LiDAR data helps foresters to measure the height of trees in a forest and hence estimate the volume of timber.
LiDAR data helps archaeologists to find archaeological sites. Remains of buildings and other sites can be almost impossible to spot with the naked eye. LiDAR can pinpoint tiny surface differences that reveal small sites like graves or big ones like sunken cities. |
| summary:
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LiDAR is important as it generates accurate measurements instantaneously. Knowing the height of the Earth’s surface is important for a number of reasons.
Landslides, small fault scarps, and other geologic features that are difficult to spot visually in the field or on aerial photographs can often be clearly shown on LiDAR images.
LiDAR data helps detect where flooding might occur. The risk of rivers flooding is linked to factors such as: climate, the material that makes up the banks of the stream, the channel slope and the topography. The LiDAR (topography) data enables more accurate mapping of where the water will flow.
LiDAR data helps planners to assess where to place new buildings; knowing the height of buildings, LiDAR can determine where shade will occur and where best to place solar systems.
LiDAR data helps foresters to measure the height of trees in a forest and hence estimate the volume of timber.
LiDAR data helps archaeologists to find archaeological sites. Remains of buildings and other sites can be almost impossible to spot with the naked eye. LiDAR can pinpoint tiny surface differences that reveal small sites like graves or big ones like sunken cities. |
| extent:
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[[-8.53551810982542,51.7952435186256],[-8.15146637563941,51.9149916137349]] |
| accessInformation:
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Contains Irish Public Sector Data (Geological Survey Ireland & the Office of Public Works) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence. |
| thumbnail:
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thumbnail/thumbnail.png |
| maxScale:
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1.7976931348623157E308 |
| typeKeywords:
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["Data","Service","Map Service","ArcGIS Server"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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. </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Knowing this time measurement scientists are able to create topography maps.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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 in 2007.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Digital Terrain Models (DTM) are bare earth models (no trees or buildings) of the Earth</SPAN></SPAN><SPAN><SPAN>’</SPAN></SPAN><SPAN><SPAN>s surface.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Hillshading is a method which gives a 3D appearance to the terrain. It shows the shape of hills and mountains using shading (levels of grey) on a map, by the use of graded shadows that would be cast by high ground if light was shining from a chosen direction.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>This data shows the hillshade of the DTM.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>This data was collected by the Office of Public Works. All data formats are provided as GeoTIFF rasters. </SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>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. OPW data has a grid cell size of of 0.125 meter by 0.125 meter. This means that each cell (pixel) represents an area of 12.5 centimetres squared.</SPAN></SPAN></P></DIV></DIV></DIV> |
| licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>This data was produced by Geological Survey Ireland (GSI) and the Office of Public Works(OPW) and is free for use under the conditions of Creative Commons Attribution 4.0 International license.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><A href="https://creativecommons.org/licenses/by/4.0/" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>https://creativecommons.org/licenses/by/4.0/</SPAN></SPAN></A></P><P STYLE="margin:0 0 14 0;"><A href="https://creativecommons.org/licenses/by/4.0/legalcode" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>https://creativecommons.org/licenses/by/4.0/legalcode</SPAN></SPAN></A></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Under the CC-BY Licence, users must acknowledge the source of the Information in their product or application.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN>Please use this specific attribution statement: "</SPAN><SPAN STYLE="font-weight:bold;">Contains Irish Public Sector Data (Geological Survey Ireland & the Office of Public Works) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence</SPAN><SPAN>".</SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN>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.</SPAN></P></DIV></DIV></DIV> |
| catalogPath:
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|
| title:
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IE_GSI_LiDAR_DTM_HS_OPW_125mm_Cork_ITM_MH_TIFF |
| type:
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Map Service |
| url:
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|
| tags:
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["Ireland","IE/GSI","LiDAR","Topographic","Elevation","Cork","Hillshade","DTM","Digital Terrain Model"] |
| culture:
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en-IE |
| name:
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IE_GSI_LiDAR_DTM_HS_OPW_125mm_Cork_ITM_MH_TIFF |
| guid:
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E4B76D0C-A68F-40A1-83DB-8292026C5157 |
| minScale:
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0 |
| spatialReference:
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IRENET95_Irish_Transverse_Mercator |