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Scientific Investigations Report 2009–5030

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2009–5030

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
centimeter (cm) 0.3937 inch (in.)
kilometer (km) 0.6214 mile (mi)
liter (L) 33.82 ounce, fluid (fl. oz)
liter (L) 0.2642 gallon (gal)
meter (m) 3.281 foot (ft)
cubic meters per second (m3/s) 35.31 cubic feet per second (ft3/s)
millimeter (mm) 0.03937 inch (in.)
square kilometer (km2) 247.1 acre
square kilometer (km2) 0.3861 square mile (mi2)

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

°F=(1.8×°C)+32.

Specific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25°C).

Concentrations of chemical constituents in water are given either in milligrams per liter (mg/L) or micrograms per liter (µg/L).

Datums

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

Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD 27).

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