DeSoto and Tunica Counties in MS 20130731 Hernando, MN DeSoto County MN This image data is the result of private and government entities working together under the guidance of DeSoto County GIS Division. Fugro Earthdata, Inc. acquired Digital Imagery with sensor Leica geosystems ADS80 SH82 for areas of DeSoto and Tunica Counties in MS project area February 17, 2013 - February 24, 2013. The project encompassed an area of approximately 978 square miles. A Leica ADS80 SH82 Digital Camera system including an inertial measuring unit (IMU) and a dual frequency airborne GPS receiver was used for the digital image acquisition. Imagery acquisition was performed February 17, 2013 thru February 24, 2013 at 4800' AMT (above mean terrain), with 30 percent sidelap between the flight lines. Ground control survey was provided by Waggoner Engineering. Digital orthophotos in TIFF format were produced with a resolution of 0.5 foot utilizing the ADS80 SH82 imagery and the client provided DTM. Delivery was on an External Hard Drive. The orthophotos will be used for GIS and planning. 20130217 20130731 Date of Photography Complete None planned -090.589782 -089.722769 +34.995776 +34.424131 None Aerial Photography Orthophoto Digital Imagery Geographic Names Information System MS DeSoto County Tunica County none none DeSoto County GIS Division Matt Hanks GIS Director mailing and physical address

365 Losher Street, Suite 200

Hernando MS 38632 United States 662-469-8142 mhanks@desotocountyms.gov 8am-5pm, Central Time GPS phase data was post processed with continuous kinematic survey techniques using "On the Fly" (OTF) integer ambiguity resolution. The GPS data was processed with forward and reverse processing algorithms. The results from each process, using the data collected at the airport, were combined to yield a single fixed integer phase differential solution of the aircraft trajectory. The differences between the forward to reverse solution within the project area were within project specifications (<10cm) in both the horizontal and vertical components, indicating a valid and accurate solution. An IMU was used to record precise changes in position and orientation of the ADS80 Digital Camera System. All IMU data was processed post flight with a filter to integrate inertial measurements and precise phase differential GPS positions. The resulting solution contains geodetic position, omega, phi, kappa, and time for digital image processing. Tiling is based on township, range, and section. Complete The orthophotography meets ASPRS Class 1 Accuracy Standards for 1:1200 scale mapping Fugro Earthdata, Inc. 20130731 1200 Digital Data 20130217 20130731 Date of Photography Ortho Imagery ADS80 SH82 The Leica GeoSystems XPro software was used for downloading and preparing imagery collected with the ADS80 Airborne Digital Sensor for softcopy photogrammetric use. The raw image was download in the field with XPro to a portable workstation. This enabled a quick look at image quality and coverage. Using the Leica Geosystems IPAS software package the GPS data was differentially processed against a base station. After the differential GPS solution was checked and verified the Leica Geosystems IPAS program was used to compute an integrated GPS/IMU navigation solution at one-second intervals. Using the GPS/IMU trajectory computed by the Leica Geosystems IPAS software and the camera calibration, XPro computed a full x,y,z, omega,phi,kappa exterior orientation of each scan line. Using the orientation data file produced the L0 imagery was resampled. The resampling removes most aircraft motion and provides epipolar geometry imagery for stereo viewing, automated aerotriangulation and automated DEM extraction. The Level 1 epipolar-resampled and georeferenced imagery usually will provide a pixel’s true ground location to within a few pixels without any additional processing. To improve accuracy, a fully automatic aerotriangulation process was performed to minimize the residual errors in the GPS/IMU derived exterior orientations. The aerotriangulation also allowed the introduction of ground control and checkpoints to ensure the accuracy specifications were achieved. Automated aerotriangulation of ADS80 imagery was performed with the Socet Set Automatic Point Measurement (APM) tool. A digital elevation model (DEM) was required for orthophoto production. DEM data was provided by the client, this DEM was used for ortho-rectification. Orthophotos were created utilizing Leica Geosystem XPro software. Orthos were created in UTM Zone 13 meters. The orthos were mosaiced together using proprietary image database and mosaicing software. The database was edited for seamlines, and other artifacts. Since the imagery was calibrated by the system calibration no color correcting was done to the imagery. The imagery was clipped out of the database into the sheet layout generated based on client use requirements. In the clipping stage, the coordinate system and georeferencing was embedded into the header of the TIFF file. The imagery tiles were QC'ed and delivered on an External Hard Drive. 20130731 Fugro Earthdata Inc. Michael Larson Project Manager mailing and physical address

3600 Jet Drive

Rapid City South Dakota 57703 United States 605-343-0280 605-343-0305 mlarson@fugro.com 8am-5pm Mountain Time Raster Pixel 11200 11200 3 State Plane Coordinate System 1983 Mississippi State Plane South Zone 2302 0.99995 -90.333333 +29.500000 2296583.333333 0 row and column 0.5 0.5 Survey Feet North American Datum of 1983 Geodetic Reference System 80 6378434.181 298.257222101 North American Vertical Datum of 1988 0.001 Feet Explicit elevation coordinate included with horizontal coordinates 0.5 foot pixel resolution Orthophotography Not Applicable DeSoto County GIS Division Matt Hanks GIS Director mailing and physical address

365 Losher Street, Suite 200

Hernando MS 38632 United States 662-469-8142 mhanks@desotocountyms.gov 8am-5pm, Central Time DeSoto and Tunica MS Counties Orthophotography Spring 2012 In no event shall the creators, custodians, or distributors of this information be liable for any damages arising out of its use (or the inability to use it). 20130731 DeSoto County GIS Division Matt Hanks GIS Director mailing and physical address

365 Losher Street, Suite 200

Hernando MS 38632 United States 662-469-8142 mhanks@desotocountyms.gov 8am-5pm, Central Time FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 None None