Note: Many of these files are in .SID (MrSID) format and can be viewed
by installing the free
LizardTech ExpressView browser plugin.
Note: Frequently, the superior orthoimages will be found by linking
to the individual "State" web-sites listed below. However, in
the case that the state of interest is not listed, or for an overview,
please refer to the "National" links.
Note: Many of these files are in GeoTIFF format, i.e. the geo-referencing
information is embedded in the .TIF file. The free utility program
GeoTiffExaminer may be used to extract the geo-referencing information
into a separate .TFW world file.