Documents that are currently available only in print will have the following icon. All of the standards documents, and subsequent updates or changes, available from this site are current and have been approved and authorized by the NMD Standards Review Board. The standards are current as of the version date indicated. Standards documents may be periodically updated to reflect changes in policy or to define new or improved data and map specifications. We have also included some documents which are only in the draft stages of the approval process.
Some documents have approval for use by USGS contractors and for USGS internal production.