Scientific Investigations Report 2005–5288

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2005–5288

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Conversion Factors, Datums, and Abbreviations

Conversion Factors

Multiply By To obtain
acre 4,047 square meter
0.4047 square hectometer
0.004047 square kilometer
acre-foot (acre-ft) 1,233 cubic meter
0.001233 cubic hectometer
cubic foot per second per mile (ft3/s)/mi 0.0176 cubic meter per second per kilometer
foot (ft) 0.3048 meter
foot per day (ft/d) 0.3048 meter per day
foot per mile (ft/mi) 0.1894 meter per kilometer
inch (in.) 2.54 centimeter
25.4 millimeter
inch per year (in/yr) 2.54 centimeter per year
mile (mi) 1.609 kilometer
square mile (mi2) 259.0 hectare
2.590 square kilometer

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

°F=(1.8×°C)+32.

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 1929 (NAVD 29). Horizontal coordinate information is referenced to the North American Datum of 1927 (NAD 27).

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

Water-Quality Measurement Abbreviations

Acronym Definition
g gram
mL milliliter
mg/L milligram per liter

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