The U.S. survey foot is obsolete. Only use for historical and legacy applications.
Credit: NIST
At the stroke of midnight on January 1, 2023, the U.S. survey foot was deemed obsolete and the international foot (i.e., 1 foot = 0.3048 meter exactly) definition officially superseded the U.S. survey foot. This retirement has been planned by National Oceanic and Atmospheric Administration (NOAA) and NIST for several years to provide national uniformity in the measurement of length. Prior to this date, several traditional linear, area, and volume surveying measurement units were only defined in terms of the U.S. survey foot. With this update, relationships are available in terms of the international foot (also known simply as the “foot”).
The preferred measurement unit of length in the United States is the meter (m) and surveyors, map makers, and engineers are encouraged to adopt the International System of Units (SI) for their work. To facilitate this transition, SI equivalents have been adopted and published in the Federal Register, online, and within NIST Handbook (HB) 44 (Appendix C, General Tables of Units of Measurements) and will be published within upcoming editions of NIST Special Publication (SP) 811, The NIST Guide for the use of the International System of Units and NIST Handbook 133 (Appendix E, General Tables of U ..
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