2004 Illinois NAIP Digital Orthophoto Quadrangle Data

Data

Summary

Illinois National Agriculture Imagery Program (NAIP) Digital Orthophotography quarter Quadrangle (DOQ) data have been created for 102 counties in the Universal Transverse Mercator (UTM) coordinate system with a NAD83 datum. NAIP acquires color-infrared digital ortho imagery during the agricultural growing seasons in the continental U.S with a 2 meter ground sample distance. NAIP imagery can obtain as much as 10% cloud cover per tile. Imagery for this data collection was acquired in the months of June through September, 2004.

Metadata

36089h32.html

Data

Data Distribution: Compressed Data

Data files are offered as LizardTech's MrSID Generation 2 .sid files. Target compression ratio was 4:1; one compressed file is roughly 8 magabytes in size.

A statewide collection of 2004 NAIP data requires about 31 Gigabytes of storage space. We do not plan to distribute compressed data files by any other means (cd-rom, zip drives, portable drives, ftp download, etc).