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The purpose of this project was to obtain Lidar data for the Illinois Height Modernization Program. |
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The purpose of this project was to obtain Lidar data for the Illinois Height Modernization Program. |
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Illinois State Geological Survey (ISGS), a division of the Prairie Research Institute of the University of Illinois, Illinois Department of Commerce and Opportunity and USGS and Woolpert. |
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| typeKeywords:
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["Data","Service","Image Service","ArcGIS Server"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>Product: Processed, classified lidar point cloud data tiles in LAS 1.4 format. Geographic Extent of entire 3 county project area: Approximately 1,409 square miles in southeastern Illinois. Dataset Description: The Lidar 2020 Data Acquisition of 3 Counties in Wabash and Embarrass Basin lidar project called for the planning, acquisition, processing, and production of derivative products of QL2+ lidar data to be collected at a nominal pulse spacing (NPS) of 0.5 meters. Project specifications were based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 2.1. The data was developed based on a horizontal datum/projection of NAD83 (2011) State Plane Illinois East Zone Survey Feet, and a vertical datum of NAVD88 (GEOID12B) US Survey Feet. Lidar data was delivered as processed LAS 1.4 files formatted to 10,548 individual 2,000-foot x 2,000-foot tiles. Ground Conditions: Lidar was collected from March 30, 2020 through April 10, 2020 while no snow was on the ground and rivers were at or below normal levels. In order to post process the lidar data to meet task order specifications and meet ASPRS vertical accuracy guidelines, Woolpert established 18 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 121 independent accuracy checkpoints (67 NVA points and 54 VVA points), were collected and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data.</SPAN></P></DIV></DIV> |
| licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey and the Illinois Height Modernization Program would be appreciated for products derived from these data. Woolpert prepared the original data as set forth in the Scope of Services, in accordance with reasonable care and due diligence as set forth in this Agreement, however, due to the easily alterable nature of electronic media, files, documents, and other deliverables, Woolpert makes no warranties, either expressed or implied, with respect to the accuracy, completeness, merchantability, or fitness for any particular purpose, including, but not limited to, use of any/all data as described within this metadata file, by any user of this data. Any use will be at the end-user's sole risk.</SPAN></P></DIV></DIV> |
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| title:
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IL_Jasper_DSM_2020 |
| type:
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Image Service |
| url:
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https://isgs-datagis1:6443/arcgis |
| tags:
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["Lidar","Classified LAS","Elevation Data","LAS Point Cloud","Remote Sensing"] |
| culture:
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en-US |
| name:
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IL_Jasper_DSM_2020 |
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| spatialReference:
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NAD_1983_2011_StatePlane_Illinois_East_FIPS_1201_Ft_US |