AeroMetric, Inc. 20110201 lidar point cloud LiDAR data was collected by AeroMetric, Inc. for the Minnesota Department of Natural Resources. The Minnesota River Basin LiDAR Acquisition project included 25 Minnesota counties with a total area of approximately 17,260 square miles. Using multiple Optech Gemini LiDAR systems, data was collected at 1700 meters to support the project area requirements. Survey checkpoints were collected by AeroMetric to assist with the validation of the LiDAR point cloud. The data was to meet a 15cm vertical RMSE which was exceeded with a vertical RMSE value about 10cm throughout the project. Accuracy statement is based on areas of moderate to flat terrain. Diminished accuracies are to be expected in areas of dense vegetation. The accuracy of the LiDAR data as tested met the vertical accuracy or better, however, derived products may be less accurate in areas of dense vegetation due to a lesser number of points defining the bare-earth in these areas. Bare Earth Surfaces (raster DEMs) were generated from the classified bare earth ground LiDAR point cloud for every tile of this 25 county project. DEMs were generated with the following criteria: Cell size 1 meter, delivered in ESRI 32-bit floating raster, tiled without overlap. The tiling scheme was provided by the Minnesota Department of Natural Resources and is from the USGS 16th 1:24,000 quadrangle tiles Georeference data was included in the raster file. Depressions (sinks), natural or man made were not filled as specified by the job spec. Water bodies (ponds and lakes) and wide streams and rivers were hydro-flattened within the DEMs based on the following criteria: 2 acre water bodies or larger or flowing water nominally wider than 100 feet. Project Data was delivered according to project requirements in NAD83 UTM15N NAVD88 GEOID 03 Meters. Abstract Addendum, USGS National Geospatial Technical Operations Center (NGTOC), data edited October 2015: Data may have been modified from the original, delivered data by the NGTOC to correct issues such as breakline enforcement and hydro-flattening of water bodies, pits and spikes, and to remove edge tinning and other anomalies. Metadata was created using vendor provided reports. End Abstract Addendum. unknown Optech Gemini 4 1.3 0.59 unknown unknown 1700 unknown -40 to 40 34 33-167 unknown unknown unknown 1 0.25 unknown 50 NAD_1983_NSRS2007 GRS 1980 0.3 unknown unknown 1.2 1 Class 7 unknown unknown 1 processed, unclassified 2 ground, bare earth 4 vegetation 6 buildings 8 model keypoints 9 water 10 ignored ground 14 bridges Lidar data was obtained from the Minnesota River Basin for the Minnesota Department of Natural Resources; this data included 25 Minnesota Counties with a total area of approximately 17,260 square miles. 20100408 20100505 ground condition Complete None planned -96.082882 -95.421465 43.891093 43.483784 None Elevation data Lidar Geographic Names Information System Minnesota Nobles county Minnesota River Basin None Data accuracy and density is limited in water and heavily vegetated areas. AeroMetric, Inc. mailing and physical

4020 Technology Parkway

Sheboygan Wisconsin 53083 USA 920-457-3631 920-457-0410 rmerry@aerometric.com Monday through Friday, 8:00 AM to 5:00 PM (Central time) unknown The spatial consistency of the data have been visually verified. Complete Survey checkpoints were collected by AeroMetric using unspecified methods. 0.274 meters RMSE(z) FVA tested at 95% using unknown number of QC points. 0.099 meters RMSE(z) CVA tested at 95% using unknown number of QC points. AeroMetric, Inc. 20110603 raster digital data not applicable Minnesota Department of Natural Resources External hard disk 20100408 20100505 ground condition unknown To provide Lidar and elevation data for the Minnesota River Basin. The LiDAR data was captured using multiple fixed wing aircraft equipped with a LiDAR systems. Each LiDAR system includes a differential GPS unit and inertial measurement system to provide superior accuracy. Acquisition parameters: 1. Scanner - Optech Gemini 2. Flight Height - 1700m above mean terrain 3. Scan Angle - 40 degrees 4. Sidelap - 50% 5. Nominal Post Spacing - 1.3m 6. Scan Frequency - 34 Hz GPS and IMU processing parameters: 1. Processing Programs and version - Applanix - POSGPS and POSProc, versions 4.4, MMS version 5.2 2. Maximum baseline length - Not greater than 60km. 3. Number of base stations during LiDAR collection - A minimum of 1. 4. Max separation between base stations during LiDAR collection - 0.05m 5. IMU processing monitored for consistency and smoothness - Yes. Point Cloud Processing: 1. Program and version - Optech ASDA, Dashmap 2. Horizontal Datum - NAD83(NSRS2007) 3. Horizontal Coordinates - Universal Transverse Mercator, Zone 15, in Meters. 4. Vertical Datum - NAVD88 5. Geoid Model used to reduce satellite derived elevations to orthometric heights - NGS Geoid03. LIDAR Processing: 1. Processing Programs and versions - TerraSolid TerraScan (version 010.021), TerraModeler (version 010.005 and TerraMatch (version 010.012) and Intergraph MicroStation (version.08.05.02.55). 2. Point Cloud data is imported to TerraScan in a Microstation V8 (V) CAD environment on a specified tiling scheme. 3. Analyze the data for overall completeness and consistency. This is to ensure that there are no voids in the data collection. 4. Inspect for calibration errors in the dataset using the TerraMatch software. This is accomplished by sampling the data collected across all flight lines and classify the individual lines to ground. The software will use the ground-classified lines to compute corrections (Heading, Pitch, Roll, and Scale). 5. Orientation corrections (i.e. Calibration corrections) are then applied (if needed) to the entire dataset. 6. Automatic ground classification is performed using algorithms with customized parameters to best fit the project area. Several areas of varying relief and planimetric features were inspected to verify the final ground surface. 7. AEROMETRIC, INC. provided Quality Assurance and Quality Control (QAQC) data for this project. AEROMETRIC captured QA/QC points in 'open terrain' land cover category that were used to test the accuracy of the LiDAR ground surface. TerraScan's Output Control Report (OCR) was used to compare the QAQC data to the LIDAR data. This routine searches the LIDAR dataset by X and Y coordinate, finds the closest LIDAR point and compares the vertical (Z) values to the known data collected in the field. Based on the QAQC data, a bias adjustment was determined, and the results were applied (if necessary) to the LIDAR data. A final OCR was performed with a resulting RMSE of 0.088m for the project. 8. Once the automatic processing and the testing of LiDAR is complete, AEROMETRIC meticulously reviews the generated bare-earth surface data to ensure that proper classification was achieved as part of a Quality Control process. 9. Breaklines were collected for all 25 counties. The criteria for breaklines was 100 ft or larger rivers with double lines and 2 acre ponds or larger. Breaklines were delivered as an ESRI feature class (PolygonZ format). Each shapefile contains georeference information. Breakline elevations use the same coordinate reference system as the LAS point cloud. Breaklines were delivered in tile format and edge match seemlessly both verically and horizontally. The tiling scheme was provided by the Minnesota Department of Natural Resources and is from the USGS 16th 1:24,000 quadrangle tiles 10.Final deliverables are generated and output to a client specified tiling scheme. unknown 20110606 LiDAR datasets Minnesota Department of Natural Resources unknown mailing and physical

500 Lafayette Road

St. Paul Minnesota 55155 USA 651-296-6517 unknown info.dnr@state.mn.us Raster Point Universal Transverse Mercator 15 0.9996 -117.000 0.0 500000 0.0 coordinate pair 3.0 3.0 meters North American Datum of 1983 (NSRS 2007) GRS-1980 6378137.0 298.257 North American Vertical Datum of 1988 0.01 meters Explicit elevation coordinate included with horizontal coordinates 20160107 20160107 US Geological Survey mailing and physical

USGS National Geospatial Program Office

12201 Sunrise Valley Drive

Reston VA 20192 USA 1-800-ASK-USGS (1--888-275-8747) Monday through Friday 8:00 AM to 4:00 PM Eastern Time Zone USA Please visit http://www.usgs.gov/ask/ to contact us. FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 None Unclassified None None None