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Overall ISGS project named U20125: LiDAR 2020-Data Processing of 5 Counties in Wabash Embarras Basin - The required Professional Services include the data processing of existing high fidelity Light Detection and Ranging (LiDAR) data for Clark, Coles, Cumberland, Douglas and Edgar Counties in Illinois in 2020. As a result of the supplemental funding from the USGS 3DEP program, the revised project area comprises of approximately 2,576.45 square miles (i.e., increase from 2,505.02). Data processing services include LiDAR classification; hydro-flattening; QA/QC, and; development of derivative deliverable products (including metadata). |
| summary:
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Overall ISGS project named U20125: LiDAR 2020-Data Processing of 5 Counties in Wabash Embarras Basin - The required Professional Services include the data processing of existing high fidelity Light Detection and Ranging (LiDAR) data for Clark, Coles, Cumberland, Douglas and Edgar Counties in Illinois in 2020. As a result of the supplemental funding from the USGS 3DEP program, the revised project area comprises of approximately 2,576.45 square miles (i.e., increase from 2,505.02). Data processing services include LiDAR classification; hydro-flattening; QA/QC, and; development of derivative deliverable products (including metadata). |
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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 Merrick and Co. |
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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><DIV><P><SPAN>LIDAR-derived binary (.las) files ASPRS ver 1.4 format containing classified points of all returns. We have 11 classifications Unclassified, Ground, Automated Low Veg [0.5-5 feet] , Automated Medium Veg [5-20 feet], Automated High Veg [20 feet], Automated Buildings, Low Noise, Water, Bridge Decks, High Noise and Ignore Ground (breakline proximity). Model key points are bit-flagged and created from ground (class = 2) points using a five foot horizontal and a 0.2 foot vertical variance. The files are delivered in 2000ft by 2000ft tiles. These files adhere to the USGS-NGP Lidar Base Specification, Version 2.1 Quality Level 2 (QL2) standards. The contractual aggregate nominal pulse spacing (ANPS) is less than or equal to 0.5m. The contractual aggregate nominal point density (ANPD) is 4.0 points or greater per square meter.</SPAN></P></DIV></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN><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 would be appreciated for products derived from these data.</SPAN></SPAN></P><P><SPAN /></P></DIV></DIV></DIV> |
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| title:
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IL_Clark_DTM_2020 |
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Image Service |
| url:
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https://isgs-datagis1:6443/arcgis |
| tags:
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["LIDAR","DEM","Intensity"] |
| culture:
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en-US |
| name:
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IL_Clark_DTM_2020 |
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NAD_1983_2011_StatePlane_Illinois_East_FIPS_1201_Ft_US |