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).
Illinois 2004 compressed NAIP DOQ data are available free-of-charge via:
- a List of Counties for UTM data download.
Data Distribution: Uncompressed Data
An ArcIMS web service is being created from the original GeoTIFF files loaded into ArcSDE.
Contact the Illinois State Library(link is external) to obtain indiviual, uncompressed Illinois 2004 NAIP orthoimagery files.