Sanborn Map Company, Inc. 20201028 raster digital data Product: These are height separation rasters modulated by intensity. Last-return lidar points were used to create 5 foot rasters. Geographic Extent: The Gogebic AOI, Michigan, covering approximately 235 square miles. Dataset Description: The lidar project called for the Planning, Acquisition, processing and derivative products of lidar data to be collected at a nominal pulse spacing (NPS) of 0.7 meters. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 2.1. The data was developed based on a horizontal projection/datum of NAD83 (2011), State Plane, International Feet and vertical datum of NAVD88 (GEOID12B), International Feet. Lidar data was delivered as processed Classified LAS 1.4 files, formatted to 1046 individual 2500 ft x 2500 ft tiles, as tiled intensity rasters, and as tiled bare-earth DEMs; all tiled to the same 2500 ft x 2500 ft schema. Ground Conditions: Lidar was collected in spring 2019 and spring 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, Sanborn Map Company, Inc., utilized a total of 4 ground control points that were used to calibrate the lidar to known ground locations established throughout the project area. An additional 10 independent accuracy checkpoints, 6 in Bare Earth and Urban landcovers (6 NVA points), 4 in Tall Grass and Brushland/Low Trees categories (4 VVA points), were used to assess the vertical accuracy of the data. These check points were not used to calibrate or post process the data. To acquire detailed surface elevation data for use in conservation planning, design, research, floodplain mapping, dam safety assessments and elevation modeling, etc. Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Intensity Images, Breaklines and Raster DEM. These lidar point cloud data were used to create intensity images, 3D breaklines, and hydro-flattened DEMs as necessary. Raster File Type = TIFF Bit Depth/Pixel Type = 24-bit float Raster Cell Size = 5 Foot Intensity Values Normalized = 16-bit Intervals/Interval Size = 4 @ 0.262 Feet 20190521 20200528 ground condition Complete None planned -90.426006 -89.869963 46.629204 46.279124 697300.00 279400.00 5167300.00 5129100.00 None Model Raster Remote Sensing Intensity Lidar None Michigan Gogebic 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. This data set was produced to meet ASPRS Positional Accuracy Standard for Digital Geospatial Data (2014) for a 10-cm RMSEz Vertical Accuracy Class. Swath Separation Image Process: Last-return lidar points were used to create a 5 foot rasters. Using automated scripting routines within GeoCue, an GeoTIFF file was created for each tile. Coloration: 0-0.262ft Green; 0.262-0.524ft Yellow; 0.524-0.786ft Orange; >0.786ft Red. These rasters are representative of interswath alignment and provide a holistic qualitative look at the positional quality of the point cloud. 20201020 Raster Pixel 500 500 NAD 1983 (2011) StatePlane Michigan North Intl Feet 47.08333333333334 45.48333333333333 -87 44.78333333333333 26246719.16 0 coordinate pair 0.001 0.001 foot_intl NAD83 National Spatial Reference System 2011 GRS 1980 6378137.0 298.257222101 20201028 20201028 Sanborn Map Company, Inc. mailing and physical

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Colorado Springs CO 80920 USA (866)726-2676 FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None. None. None. Unclassified. None. None. None.