{ "currentVersion": 10.81, "cimVersion": "2.6.0", "serviceDescription": "

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, airplane 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>

Knowing this time measurement scientists are able to create topography maps.<\/SPAN><\/SPAN><\/P>

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 Oct. 2006 and Jan. 2007. <\/SPAN><\/SPAN><\/P>

Digital Terrain Models (DTM) are bare earth models (no trees or buildings) of the Earth<\/SPAN><\/SPAN>\u2019<\/SPAN><\/SPAN>s surface.<\/SPAN><\/SPAN><\/P>

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>

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>

This data shows the hillshade of the DTM.<\/SPAN><\/SPAN><\/P>

This data was collected by the Office of Public Works. All data formats are provided as GeoTIFF rasters. <\/SPAN><\/SPAN><\/P>

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 2 meter by 2 meter. This means that each cell (pixel) represents an area of 2 meter squared.<\/SPAN><\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "mapName": "opw index", "description": "

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, airplane 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>

Knowing this time measurement scientists are able to create topography maps.<\/SPAN><\/SPAN><\/P>

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 Oct. 2006 and Jan. 2007. <\/SPAN><\/SPAN><\/P>

Digital Terrain Models (DTM) are bare earth models (no trees or buildings) of the Earth<\/SPAN><\/SPAN>\u2019<\/SPAN><\/SPAN>s surface.<\/SPAN><\/SPAN><\/P>

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>

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>

This data shows the hillshade of the DTM.<\/SPAN><\/SPAN><\/P>

This data was collected by the Office of Public Works. All data formats are provided as GeoTIFF rasters. <\/SPAN><\/SPAN><\/P>

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 2 meter by 2 meter. This means that each cell (pixel) represents an area of 2 meter squared.<\/SPAN><\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "copyrightText": "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.", "supportsDynamicLayers": true, "layers": [ { "id": 0, "name": "LiDAR DTM Hillshade OPW 2m Ireland (ROI) ITM MH TIFF", "parentLayerId": -1, "defaultVisibility": true, "subLayerIds": null, "minScale": 0, "maxScale": 0, "type": "Raster Layer", "supportsDynamicLegends": true } ], "tables": [], "spatialReference": { "wkid": 2157, "latestWkid": 2157, "xyTolerance": 0.001, "zTolerance": 2.0E-4, "mTolerance": 2.0E-4, "falseX": -5022200, "falseY": -15179500, "xyUnits": 4.503464523434792E8, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "singleFusedMapCache": false, "initialExtent": { "xmin": 343696.4663945354, "ymin": 509662.9770630585, "xmax": 828303.5284054646, "ymax": 860337.0323369404, "spatialReference": { "wkid": 2157, "latestWkid": 2157, "xyTolerance": 0.001, "zTolerance": 2.0E-4, "mTolerance": 2.0E-4, "falseX": -5022200, "falseY": -15179500, "xyUnits": 4.503464523434792E8, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 } }, "fullExtent": { "xmin": 440984.03098892904, "ymin": 527070.430703469, "xmax": 731309.474734116, "ymax": 844004.1411993221, "spatialReference": { "wkid": 2157, "latestWkid": 2157, "xyTolerance": 0.001, "zTolerance": 2.0E-4, "mTolerance": 2.0E-4, "falseX": -5022200, "falseY": -15179500, "xyUnits": 4.503464523434792E8, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 } }, "minScale": 0, "maxScale": 0, "units": "esriMeters", "supportedImageFormatTypes": "PNG32,PNG24,PNG,JPG,DIB,TIFF,EMF,PS,PDF,GIF,SVG,SVGZ,BMP", "documentInfo": { "Title": "C:\\PROPROJECTS\\Template1\\Template1.aprx", "Author": "", "Comments": "", "Subject": "", "Category": "", "AntialiasingMode": "None", "TextAntialiasingMode": "Force", "Keywords": "Ireland,IE/GSI,LiDAR,Topographic,Elevation,Hillshade,DTM,Digital Terrain Model" }, "capabilities": "Map,Query,Data", "supportedQueryFormats": "JSON, geoJSON, PBF", "exportTilesAllowed": false, "referenceScale": 0.0, "supportsDatumTransformation": true, "archivingInfo": {"supportsHistoricMoment": false}, "supportsClipping": true, "supportsSpatialFilter": true, "supportsQueryDataElements": true, "maxRecordCount": 2000, "maxImageHeight": 4096, "maxImageWidth": 4096, "supportedExtensions": "", "serviceItemId": "759523fff90a4abaab867b1c406af946" }