GeoExpress reads and maintains accurate georeferencing for images in USGS DOQ format. DOQ files contain metadata information in an ASCII header file contained within the file.
GeoExpress can read images in both old and new DOQ header formats. The less common “exponential” DOQ header format is not supported.
An example of the current standard USGS DOQ header format can be found in this U.S. Geological Survey standards document.
For more Digital Orthophoto Standards documents from the USGS, visit https://nationalmap.gov/standards/doqstds.html.