• 60 cm (~ 2ft)
• Ortho Rectified 3-Band Compressed County Mosaics
• 4-Band Digital Ortho Quarter Quads (DOQQ)

Abstract:
The US Department of Agriculture - Farm Services Agency (USDA-FSA) NAIP program is designed to acquire 4-band digital ortho imagery from airborne and/or space based platforms during the agricultural growing seasons in the U.S. This NAIP product provides 60 cm ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 4 meters to true ground at a 95% confidence level. The tiling format of NAIP imagery is based on a 3.75' x 3.75' quarter quadrangle with a 300 pixel buffer on all four sides. NAIP quarter quads are formatted to the UTM coordinate system using NAD83 Zones 15 (west) and 16 (east). NAIP imagery may contain as much as 10% cloud cover per tile. The county files were generated by compressing NAIP quarter quadrangle tiles that cover a county. MrSID compression, with mosaic option, was used. Target values for the compression ratio are 60:1. For further information concerning the NAIP, visit: USDA NAIP GeoHub

File Structure: (County files ~ 500MB / Statewide ~ 28 GB)

• <countyname>16.sid - County mosaic image
• <countyname>16.sdw - Mosaic world reference file
• <countyname>_seam16.sdw - County flight seamline

Map of Photo Dates: PDF Download

DOQQ Source Date: Shapefile

The 4-Band DOQQ .tiffs are now available online for download: Download
(Entire state ~ 1.8 TB). Also available by sending external hard drive.

DOQQ Naming Scheme: Excel file (Thanks Larry Smith and Carl Haydel of MSDH)