Merrick-Surdex Joint Venture, LLP 20200807 raster digital data A one-meter (1m) cell size Digital Elevation Model (DEM) raster was created from the ground classified lidar points plus the breaklines. The files are delivered in tile format (1000m by 1000m), The rasters are delivered in 32-bit floating point GeoTIFF format (.tif) and adhere to USGS-NGP Lidar Base Specification, Version 2.1. This project will support the 3DEP mission, the Federal Emergency Management Agency (FEMA) Risk Mapping, Assessment and Planning (MAP) program and the Natural Resources Conservation Service (NRCS) high resolution elevation enterprise program. The entire AOI covers approximately 8,964 square miles in total in Northeast Nebraska delivered in UTM Zone 14 coordinate system. This project is broken into three delivery blocks. The following block square miles are approximations: Block1 = 4492, Block2 = 2964, Block3 = 1508. Raster File Type = TIFF Bit Depth/Pixel Type = 32-bit float Raster Cell Size = 1 meter Interpolation or Resampling Technique = Triangulated Irregular Network (TIN) Required Vertical Accuracy = 19.6cm NVA 20200418 20200426 ground condition Complete Unknown -97.520827 -97.116289 42.891196 41.734899 623000.000000 654000.000000 4750000.000000 4622000.000000 None Breaklines Elevation Data Lidar DSM Intensity None Northeast Nebraska 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be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions.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. The dataset was reviewed to ensure completeness and accuracy. This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. Using MARS software a one-meter (1m) 32-bit floating point DEM raster in GeoTIFF format (.tif) were created using the ground classified lidar points with the hydro-flattened breaklines. The files are delivered in 1000m by 1000m tiles. 20200805 Raster Pixel 1000 1000 Universal Transverse Mercator 14 0.9996 -99.000000 0.000000 500000 0 row and column 1.0 1.0 meters D_NAD_1983_2011 Geodetic Reference System 80 6378137.000000 298.257222 North American Vertical Datum of 1988 Geoid2018 .001 meters Explicit elevation coordinate included with horizontal coordinates 20200808 Merrick-Surdex Joint Venture, LLP mailing and physical address

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Greenwood Village CO 80111 USA 303-353-3903 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998