Scientific Investigations Report 2006–5145

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5145

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
acre 4,047 square meter (m2)
0.4047 hectare (ha)
0.4047 square hectometer (hm2)
acre-foot (acre-ft) 1,233 cubic meter (m3)
0.001233 cubic hectometer (hm3)
acre-foot per day (acre-ft/d) 0.01427 cubic meter per second (m3/s)
acre-foot per year (acre-ft/yr) 1,233 cubic meter per year (m3/yr)
0.001233 cubic hectometer per year (hm3/yr)
foot (ft) 0.3048 meter (m)
foot per year (ft/yr) 0.08345 centimeter per day (cm/d)
gallon (gal) 3.785 liter (L)
0.003785 cubic meter (m3)
gallon per minute (gal/min) 0.06309 liter per second (L/s)
inch (in.) 2.54 centimeter (cm)
25.4 millimeter (mm)
25,400 micrometer (µm)
inch per year (in/yr) 0.06954 millimeter per day (mm/d)
kilowatthour (kWh) 3,600,000 joule (J)
mile (mi) 1.609 kilometer (km)
square mile (mi2) 2.590 square kilometer (km2)
pound per square inch (lb/in2) 6.895 kilopascal (kPa)
pound per square inch (lb/in2) 68,947.6 dyne per square centimeter (dyne/cm2)
Watt per square foot (W/ft2) 10.76 Watt per square meter (W/m2)

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

°C = (°F - 32) / 1.8.

English units are used throughout this report except in cases where units have no English-unit equivalent.

Datums

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

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

Altitude refers to a distance above the vertical datum.

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