National Agriculture Imagery Program (NAIP)
NAIP imagery includes 1-meter resolution aerial based photos of the entire state of California. It was flown for California in 2005 and more recently in 2009 through a multi-agency effort.
Data can be downloaded from Cal-Atlas.
Current offerings include:
2009 - Natural Color
Available as County wide photo mosaics in the MrSid format, download the ".sid" and ".sdw" files to view the imagery in a GIS. Color-Infrared and additional formats are estimated to be released in summer 2010.
2005 - Natural Color
Available as County wide photo mosaics in the MrSid format, as Digital Orthophoto Quadrangle (DOQ) in JPEG2000 format, or in Digital Orthophoto Quarter-Quadrangle (DOQQ) in GeoTIF format.
2005 - Color Infrared
Available as Digital Orthophoto Quadrangle (DOQ) in JPEG2000 format.
