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Scientific Investigations Report 2008–5126

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5126

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
inch (in.) 2.54 centimeter (cm)
foot (ft) 0.3048 meter (m)
mile (mi) 1.609 kilometer (km)
acre 0.4047 hectare (ha)
square mile (mi2) 2.590 square kilometer (km2)
cubic foot per second (ft3/s) 0.02832 cubic meter per second (m3/s)
inch per year (in/yr) 25.4 millimeter per year (mm/yr)
inch per hour (in/hr) 25.4 millimeter per hour (mm/hr)

Temperature in degrees Fahrenheit (°F) may be converted to degrees Celsius (°C) as follows:

°C=(°F-32)/1.8.

Datums

Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).

Altitude, as used in this report, refers to distance above the vertical datum.

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