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C3565574177-NSIDC_CPRD/beta_atl08_100m_land_segment_icesat2_v7 (FeatureServer)

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Service Description: <p style='border-top:3px solid cornflowerblue; border-bottom:3px solid cornflowerblue; padding:10px 0;'><font color='#6495ed'><b>NOTICE: This is a beta service without operational support. It will be expanded in a future release to cover the historical and ongoing temporal record of ATL08. </b></font></p> This map service is a GIS-ready version of the <a href='https://doi.org/10.5067/ATLAS/ATL08.007' target='_blank'>ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 7</a> (ATL08) data set. ATL08 provides along-track estimates of terrain height, canopy height, and canopy cover, as well as beam and reference parameters, acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the ICESat-2 observatory. The complete ATL08 source data formatted as HDF5 files are available from the NASA NSIDC DAAC, along with <a href='https://nsidc.org/data/atl08/versions/7#anchor-documentation' target='_blank'>user documentation</a> and <a href='https://nsidc.org/data/atl08/versions/7#anchor-help-articles' target='_blank'>resources</a>. <div><br /></div><div>This beta map service displays ATL08 data as a series of georeferenced points arranged in linear “ground tracks.” These ground tracks represent the 100 m land segments output from the algorithms applied to the photon return data collected by the ATLAS instrument as ICESat-2 orbits the Earth over its 91-day repeat cycle. As shown in the figure below, the ATLAS instrument measures data along six ground tracks (GT) arranged in 3 pairs (one “weak” beam and one “strong” beam in each pair). Each GT is numbered according to the relative location of the laser that generates it, along with L (left) or R (right). GT1L and GT1R form pair one, GT2L and GT2R form pair two, and GT3L and GT3R form pair three, with GT1L on the far left and GT3R on the far right relative to the satellite flight direction. Left/right beams within each pair are approximately 90 m apart with the pairs separated by 3.3 km in the across-track direction. The along-track laser spacing is ~70 cm. Algorithms produce parameters representing 100 m land segments in the along-track direction for each beam. </div><div><br /></div><div><img alt='ATL08 Ground Tracks' src='https://nsidc.org/sites/default/files/images/ICESat-2_how-it-works.jpg' /></div><div>Image source: Smith et al., 2019 - https://doi.org/10.1016/j.rse.2019.111352 </div><div><br /></div><div>Additional information about the ATLAS instrument, ICESat-2 satellite, and ground track naming conventions and geometry can be found in Appendix A of the <a href='https://nsidc.org/sites/default/files/documents/user-guide/atl08-v007-userguide.pdf' target='_blank'>ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 7 User Guide</a>. </div><div><br /></div><div><b>Available Parameters</b></div><div><br /></div><div>A selection of “core” parameters was chosen from the full suite of parameters available in the complete ATL08 source data. A list of the available core parameters, including canopy and terrain height, can be found in the <a href='https://nsidc.org/sites/default/files/documents/technical-reference/atl08_egis_techref.pdf' target='_blank'>technical specification document</a>. When accessing the data through the web-based Map Viewer, these parameters are visible as a popup window when a single data point is selected. <i>Note: where canopy data is absent, these parameters will not have values.</i></div><div><br /></div><div><b>Spatial Coverages and Resolution</b></div><div><br /></div><div>Spatial coverage is nearly global (approximately 88° N to 88° S). However, data are not produced for orbital segments that cross open ocean only (i.e., do not cross a land surface).</div><div><br /></div><div>The canopy and ground surfaces are processed in fixed 100 m data segments, which typically contain more than 100 signal photons but may in some cases contain less.</div><div><br /></div><div><b>Temporal Coverage and Resolution</b></div><div><b><br /></b></div><div>9 December 2025 to 11 March 2026</div><div><br /></div><div>Data are re-acquired along each of ATLAS/ICESat-2's 1,387 reference ground track every 91 days. This beta service presents a single 91-day satellite repeat cycle. </div><div><br /></div><div><div><b>Recommended Data Access Guidelines</b></div><div><br /></div><div>If you would like to access these data using ArcGIS Pro or QGIS, we recommend using the <a href='https://gis.earthdata.nasa.gov/portal/home/item.html?id=809dc2ec6339461e81109dc5a1262131' target='_blank'>Feature Service</a>, rather than the Map Service. When accessing the Map Service data using the web-based Map Viewer, we suggest the following settings be applied:</div></div><div><ol><li>Time Slider: Set temporal range to the full 91-day extent </li><li>Visibility Range: Within the map properties window, ensure the current map scale (black triangle) is within the selected visibility range</li></ol><img alt='Recommended viewer settings' src='https://nsidc.org/sites/default/files/images/Screenshot/ATL08_mapviewer.png' /></div>Recommended settings when using Map Viewer.<div><br /></div><div>For in-depth data users who wish to perform customized data processing, we suggest using the full ATL08 source data, available from the NASA NSIDC DAAC as <a href='https://nsidc.org/data/atl08/versions/7' target='_blank'>ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 7</a>. </div>

All Layers and Tables

Has Versioned Data: false

MaxRecordCount: 2000

Supported Query Formats: JSON

Supports Query Data Elements: true

Layers: Description: NOTICE: This is a beta service without operational support. It will be expanded in a future release to cover the historical and ongoing temporal record of ATL08. This map service is a GIS-ready version of the ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 7 (ATL08) data set. ATL08 provides along-track estimates of terrain height, canopy height, and canopy cover, as well as beam and reference parameters, acquired by the Advanced Topographic Laser Altimeter System (ATLAS) instrument on board the ICESat-2 observatory. The complete ATL08 source data formatted as HDF5 files are available from the NASA NSIDC DAAC, along with user documentation and resources. This beta map service displays ATL08 data as a series of georeferenced points arranged in linear “ground tracks.” These ground tracks represent the 100 m land segments output from the algorithms applied to the photon return data collected by the ATLAS instrument as ICESat-2 orbits the Earth over its 91-day repeat cycle. As shown in the figure below, the ATLAS instrument measures data along six ground tracks (GT) arranged in 3 pairs (one “weak” beam and one “strong” beam in each pair). Each GT is numbered according to the relative location of the laser that generates it, along with L (left) or R (right). GT1L and GT1R form pair one, GT2L and GT2R form pair two, and GT3L and GT3R form pair three, with GT1L on the far left and GT3R on the far right relative to the satellite flight direction. Left/right beams within each pair are approximately 90 m apart with the pairs separated by 3.3 km in the across-track direction. The along-track laser spacing is ~70 cm. Algorithms produce parameters representing 100 m land segments in the along-track direction for each beam. Image source: Smith et al., 2019 - https://doi.org/10.1016/j.rse.2019.111352 Additional information about the ATLAS instrument, ICESat-2 satellite, and ground track naming conventions and geometry can be found in Appendix A of the ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 7 User Guide. Available ParametersA selection of “core” parameters was chosen from the full suite of parameters available in the complete ATL08 source data. A list of the available core parameters, including canopy and terrain height, can be found in the technical specification document. When accessing the data through the web-based Map Viewer, these parameters are visible as a popup window when a single data point is selected. Note: where canopy data is absent, these parameters will not have values.Spatial Coverages and ResolutionSpatial coverage is nearly global (approximately 88° N to 88° S). However, data are not produced for orbital segments that cross open ocean only (i.e., do not cross a land surface).The canopy and ground surfaces are processed in fixed 100 m data segments, which typically contain more than 100 signal photons but may in some cases contain less.Temporal Coverage and Resolution9 December 2025 to 11 March 2026Data are re-acquired along each of ATLAS/ICESat-2's 1,387 reference ground track every 91 days. This beta service presents a single 91-day satellite repeat cycle. Recommended Data Access GuidelinesIf you would like to access these data using ArcGIS Pro or QGIS, we recommend using the Feature Service, rather than the Map Service. When accessing the Map Service data using the web-based Map Viewer, we suggest the following settings be applied:Time Slider: Set temporal range to the full 91-day extent Visibility Range: Within the map properties window, ensure the current map scale (black triangle) is within the selected visibility rangeRecommended settings when using Map Viewer.For in-depth data users who wish to perform customized data processing, we suggest using the full ATL08 source data, available from the NASA NSIDC DAAC as ATLAS/ICESat-2 L3A Land and Vegetation Height, Version 7.

Service Item Id: 809dc2ec6339461e81109dc5a1262131

Copyright Text: This data service was created by the NASA NSIDC DAAC using data sourced from ATLAS/ICESat-2 L3A Land and Vegetation Height (ATL08), Version 7. Please see Terms of Use for how to correctly cite this data product.

Spatial Reference: 4326  (4326)  LatestVCSWkid(0)


Initial Extent: Full Extent: Units: esriDecimalDegrees

Document Info: Enable Z Defaults: false

Supports ApplyEdits With Global Ids: false

Support True Curves : true

Only Allow TrueCurve Updates By TrueCurveClients : true

Supports Return Service Edits Option : true

Supports Dynamic Layers: false

Child Resources:   Info   Query Data Elements   Relationships   SharedTemplates

Supported Operations:   Query   Query Contingent Values   QueryDomains   Append   Extract Changes   Get Estimates