Woolpert Inc 20171231 Raster digital data Product: These are Digital Elevation Model (DEM) data for SD Missouri River Lidar 2016 D16 as part of the required deliverables for the SD Missouri River Lidar 2016 D16 project. Class 2 (ground) lidar points in conjunction with the hydro breaklines and bridge breaklines were used to create a 0.5 meter hydro-flattened Raster DEM. Geographic Extent: AOI is located in southeastern South Dakota. The area of interest covers approximately 3,726 square miles. Dataset Description: SD Missouri River Lidar 2016 D16 Lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.35 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.2. The data was developed based on a horizontal projection/datum of NAD83, Universal Transverse Mercator, meters and vertical datum of NAVD88 (GEOID12B), meters. Lidar data was delivered as flightline-extent unclassified LAS swaths, as processed Classified LAS 1.4 files, formatted to 10,007 individual 1,000 m x 1,000 m tiles in NAD83(2011) UTM Zone 14N as tiled Intensity Imagery, and as tiled bare earth DEMs; all tiled to the same 1,000 m x 1,000 m schema. Ground Conditions: Lidar was collected from November 28, 2016 till April 22, 2017, 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 a total of 73 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. Additional independent accuracy checkpoints were collected (108 NVA points and 88 VVA points) and used to assess the vertical accuracy of the data. These checkpoints were not used to calibrate or post process the data. To further support the delivery of the Conservation Technical Assistance (CTA) that is a part of the Soil Conservation and Domestic Allocation Act of 1936 and to deliver the agricultural programs that are a part of the Food, Conservation, and Security Act “Farm Bill” of 2008. The data will be used by the USDA-NRCS to generate digital elevation models for use in engineering design and design reviews, conservation planning, research, delivery, floodplain mapping, and hydrologic modeling utilizing LiDAR technology. Raster File Type = IMG Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 0.5 Meter Interpolation or Resampling Technique = Triangulated Irregular Network Required Vertical Accuracy = 19.6 cm NVA 20161128 20170422 ground condition Complete As needed -99.57797 -98.06811 44.19732 42.83602 None Model DEM Remote Sensing Elevation Data Lidar None South Dakota Charles Mix County Brule County Aurora County Buffalo County Jerauld County No restrictions apply to these data. 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. Data covers the entire area specified for this project. Datasets contain complete coverage of tiles. No points have been removed or excluded. A visual qualitative assessment was performed to ensure data completeness. There are no void areas or missing data. The raw point cloud is of good quality and data passes Non-Vegetated Vertical Accuracy specifications. Produced to meet 0.682 meters horizontal accuracy at 95 percent confidence level. LAS data covering the SD Missouri River Lidar 2016 D16 Lidar Task Order was compared to independent survey control points to determine the NVA of the LAS Swath and of the Bare-Earth DEM. In addition, this LAS data was compared to independent VVA points. LAS Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.141 Meters Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.072 Meters (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.139 Meters Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using 0.071 Meters (RMSEz) x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines. 0.139 Meters Raw Swath Non-Vegetated Vertical Accuracy (NVA) Tested 0.139 Meters Non vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) 0.071 x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the TIN using all lidar points against 108 NVA points. 0.139 Meters Bare-Earth DEM Non-Vegetated Vertical Accuracy (NVA) Tested 0.139 Meters Non-Vegetated vertical accuracy at a 95 percent confidence level, derived according to NSSDA, in open terrain using (RMSEz) 0.071 x 1.96000 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM against 108 NVA points. 0.166 Meters Vegetated Vertical Accuracy (VVA) Tested 0.166 Meters at the 95th percentile reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines and tested against the DEM against 88 VVA points. VVA Errors larger than 95th percentile include: Point 3005, Easting 525029.802, Northing 4771623.005, Z-Error 0.222 Meters Point 3008, Easting 513076.736, Northing 4803126.493, Z-Error 0.175 Meters Point 3065, Easting 535269.582, Northing 4789249.052, Z-Error 0.230 Meters Point 3065A, Easting 535261.580, Northing 4789462.832, Z-Error 0.185 Meters Hydro Flattened Raster DEM Process: Class 2 (ground) lidar points in conjunction with the hydro breaklines as well bridge breaklines were used to create a 0.5 meter hydro-flattened Raster DEM. Using automated scripting routines within ArcMap, an ERDAS Imagine IMG file was created for each tile. Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface. 20161128 Raster Universal Transverse Mercator 14 0.9996 -99.0 0.0 500000.0 0.0 row and column 0.5 0.5 meters D NAD 1983 2011 GRS 1980 6378137.0 298.257222101 USGS/NGTOC mailing and physical address

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Rolla MO 65401 USA (573) 308-3587 Unknown Unknown The information contained in these data is dynamic and may change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and within the limitations of the data for which it was requested and prepared, in general, and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data. It is not appropriate to use the related graphics as data. Woolpert gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data are directly acquired from a Woolpert server, and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully upon Woolpert’s computer system, no warranty, expressed or implied, is made regarding the utility of the data on another system, or for general or scientific purposes; nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. 20171231 Woolpert Inc. mailing and physical

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