Sanborn Map Company, Inc. 20200810 raster digital data Product: These lidar data are processed Classified LAS 1.4 files, formatted to 1046 individual 2500 ft x 2500 ft tiles; used to create intensity images, 3D breaklines and hydro-flattened DEMs as necessary. Geographic Extent: Gogebic AOI, Michigan, covering approximately 235 square miles. Dataset Description: Gogebic AOI, Michigan 2019 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 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base Lidar Specification, Version 1.3. The data was developed based on a horizontal projection/datum of NAD83 (2011), State Plane Coordinate System, 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 Imagery, 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, 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. established 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 check points, 6 in Open Terrain/Bare-Earth and Urban landcovers (6 NVA points), 4 in Grass, Brush and 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. The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 2 foot cell size. These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, hydro-flattened DEMs as necessary. Raster File Type = TIFF Bit Depth/Pixel Type = 8 bit Raster Cell Size = 2 foot Intensity Values Normalized To = 16 bit 20190521 20200528 ground condition Complete None planned -90.426006 -89.869963 46.629204 46.279124 None Intensity Images Elevation Data Lidar None Michigan Gogebic AOI 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 BPA specified for this project. A visual qualitative assessment was performed to ensure data completeness. No void areas or missing data exist. Intensity Image Generation Process: GeoCue software was used to create the deliverable Intensity Images. All overlap classes were ignored during this process. This helps to ensure a more aesthetically pleasing image. The GeoCue software was then used to verify full project coverage as well. TIF/TWF files were then provided as the deliverable for this dataset requirement. 20200717 Raster Pixel 1250 1250 State Plane Coordinate System 1983 2111 0.9999 -87 44.78333333333333 26246719.16 0 row and column 2 2 feet NAD83 National Spatial Reference System 2011 Geodetic Reference System 80 6378137 298.257222101 20200810 Sanborn Map Company, Inc. mailing and physical

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