| Conversion Factors, Datums, and Supplemental Information
Conversion Factors
International System of Units to U.S. customary units
Multiply |
By |
To obtain |
Length |
meter (m) |
3.281 |
foot (ft) |
kilometer (km) |
0.6214 |
mile (mi) |
kilometer (km) |
0.5400 |
mile, nautical (nmi) |
meter (m) |
1.094 |
yard (yd) |
Area |
square kilometer (km2) |
247.1 |
acre |
square kilometer (km2) |
0.3861 |
square mile (mi2) |
Datum
Vertical coordinate information is referenced to mean lower low water (MLLW).
Horizontal coordinate information is referenced to the World Geodetic System of 1984 (WGS 84).
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