USDA-FSA Aerial Photography Field Office 20100825 Salt Lake City, Utah USDA FSA Aerial Photography Field Office This data set contains imagery from the National Agriculture Imagery Program (NAIP). The NAIP acquires digital ortho imagery during the agricultural growing seasons in the continental U.S.. A primary goal of the NAIP program is to enable availability of ortho imagery within one year of acquisition. NAIP provides two main products: 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 5 meters of reference digital ortho quarter quads (DOQQ's) from the National Digital Ortho Program (NDOP) or from the National Agriculture Imagery Program (NAIP); 1 meter GSD ortho imagery rectified to within +/- 6 meters to true ground. The tiling format of NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle with a 300 meter buffer on all four sides. The NAIP imagery is formatted to the UTM coordinate system using the North American Datum of 1983 (NAD83). The NAIP imagery may contain as much as 10% cloud per tile. This file was generated by compressing NAIP imagery that cover the county extent. Two types of compression may be used for NAIP imagery: MrSID and JPEG 2000. Target values for the compression ratio are (15:1). The NAIP imagery is available for distribution within 60 days of the end of a flying season and is intended to provide current information of agricultural conditions in support of USDA farm programs. For USDA Farm Service Agency, the 1 meter GSD product provides an ortho image base for Common Land Unit boundaries and other data sets. The NAIP imagery is generally acquired in projects covering full states in cooperation with state government and other federal agencies who use the imagery for a variety of purposes including land use planning and natural resource assessment.The NAIP is also used for disaster response often providing the most current pre-event imagery. 20100825 Photography Source Image Dates Complete Irregular -94.390579 -93.740607 44.321127 43.803851 None Farming Digital Ortho rectified Image Mosaic Quarter Quadrangle Centered Ortho Rectification Compression MrSID JPEG 2000 NAIP Compliance Aerial Compliance Geographic Names Information System USA FSA Field Service Center Aerial Photography Field Office APFO USDA United State Department of Agriculture (USDA) Blue Earth Co. MN FIPS 27013 Blue Earth Minnesota None None, The USDA-FSA Aerial Photography Field Office asks to be credited in derived products. If defects are found in the NAIP imagery during the warranty period such as horizontal offsets, replacement imagery may be provided. Imagery containing defects that require the acquisition of new imagery, such as excessive cloud cover, specular reflectance, etc., will not be replaced within a NAIP project year. USDA-FSA Aerial Photography Field Office mailing and physical address

2222 West 2300 South

Salt Lake City Utah 84119-2020 USA 801-844-2922 801-956-3653 withheld None None ESRI ArcCatalog 9.2 NAIP 3.75 minute tile file names are based on the USGS quadrangle naming convention. None FSA Digital Orthophoto Specs. N/A 2d only Aerial Photography Field Office 20100825 12000 CD/DVD 20100825 Majority Aerial Photography Date MrSID compressed image Mosaicked County Image Aerial Services, Inc utilized Leica Geosystems Flight Planning Evaluation Software (FPES) to create the flight planning for the digital camera flights. The flights were flown at an average flight height of 23,730 feet above ground with a 75cm gsd. Each line had 25% sidelap with the adjacent lines. A Navaho and a Cheyenne aircraft were used on the project. The planes carried Leica digital camera ADS80-SH82 systems with sensors SN1300 and SN1301. Each camera has been calibrated by Leica. Certification and calibration data is on file at Leica Geosystems. ADS80-SH82, SN1300 certification number: 763806_1300_090130-1. ADS80-SH82, SN1301 certification number: 763806_1301_080926-1. Each line is approximately 12,000 pixels wide and 200,000 pixels long. The Leica camera collects 11 bands of imagery at 16 bit. ASI extracts 3 bands of panchromatic for use in the aero-triangulation. Four nadir bands (RGBN) are extracted to be used in rectification. Each camera uses Novetel OEM4 GPS units to collect IMU data. Upon completion of flight lines the imagery is reviewed in the field/office to ensure it meets contract specifications. ABGPS/IMU data is processed using Leica IPAS Pro and GrafNav programs. The aero-triangulation was completed with the ABGPS/IMU data only. Pass-points were generated at 5% intervals along each line and 7 regions across each flight line. Tie-points were generated at 5% intervals with 2 regions between flight lines. Analysis of report documents as well as visual inspection along imagery line overlaps are completed to ensure accuracies of the aero-triangulation. Thirty Meter NEDs were downloaded from the USGS Data Gateway website for use on this project. No corrections or changes were made to the NED data. Ortho rectification was completed using Leica XPRO software version 4.2. The NEDs were used for the elevation data in the ortho production. An initial review of the raw orthos against control points was completed at this stage. Eighty-nine control points were used as check control on the project. Of those, fifty-eight points were supplied by the USDA from the 2008 Minnesota NAIP project. The remaining points were collected from secondary sources in the project state. A final accuracy check was completed on the final DOQQS. The RMSE values will be determined at the project completion. Once the data passed accuracy requirements, Inpho OrthoVista (4.4) was used for seaming the ortho lines together and adjusting the tones of the imagery. The DOQQs were cut and renamed directly from OrthoVista program. At this stage the DOQQs are output as 8 bit imagery. Once the DOQQs were cut a batch file was used to assign the majority date of the DOQQ imagery to the file name. Contractor made all attempts to match tone requirements of the project. Variations of the ground cover may cause some deviation from the specifications. ASI designed a batch routine to check and adjust the tones of each DOQQ to the desired tone values. DOQQs and CCMs were reviewed in either Erdas Imagine or ESRI ArcMap. Each data set was reviewed for tone, artifacts, seamline issues, and accuracy. Lizardtech GeoExpress (7.0.3) was used to create the CCM image file. Each mosaic was made with RGB bands and has an approximate 1:15 compression level. CCM metadata was created using Arcmap and routines from our database. Erdas Imagine is used to insert headers into the files and create the aux files for the data. Exported dxf seamlines from OrthoVista were taken into ArcMap to generate seamline polygons. Each polygon was populated with the required attributes. CCM data was written to CD/DVD using Gear Software. DOQQs were transported on internal hard drives. 20100825 None Raster Pixel Universal Transverse Mercator 15 0.9996 -93.000000 0.0 500000 0.0 row and column 1 1 meters North American Datum of 1983 Geodetic Reference System 80 6378137 298.257 24-bit pixels, 3 band color (RGB) represent brightness values 0 - 255 None Supervisor Customer Services Section USDA-FSA Aerial Photography Field Office mailing and physical address

2222 West 2300 South

Salt Lake City Utah 84119-2020 USA 801-844-2922 801-956-3653 Mosaic image for Blue Earth County, MN 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). Compressed County Mosaic Natural Color withheld CD-ROM ISO 9660 DVD-R ISO 9660 USB/Firewire/SATA External Hard Drive NTFS Contact the Aerial Photography Field Office for more information 20100825 USDA-FSA Aerial Photography Field Office mailing and physical address

2222 West 2300 South

Salt Lake City Utah 84119-2020 USA 801-844-2922 Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998