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.
DOQ Data Extents
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).
An ArcIMS web service is being created from the original GeoTIFF files loaded into ArcSDE.
Contact theto obtain indiviual, uncompressed Illinois 2004 NAIP orthoimagery files.
Project funding was contributed by the.