• 1 Meter
• 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 airbourne and/or space based platforms during the agricultural growing seasons in the U.S. This NAIP product provides 1 meter ground sample distance (GSD) ortho imagery rectified to a horizontal accuracy of within +/- 6 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 meter 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 15:1.

For further information concerning the NAIP, visit: USDA NAIP GeoHub

File Structure: (County files ~ 500MB / Statewide ~ 42 GB)

• <countyname>12.sid - County mosaic image
• <countyname>12.sdw - Mosaic world reference file
• <countyname>12.prj - ESRI projection file
• <countyname>12.aux - Mosaic auxiliary file
• <countyname>12.sid.xml - FGDC Metadata in .XML format

Map of Photo Dates: PDF Download