Scientific Investigations Report 2006–5205

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2006–5205

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
inch (in.) 2.54 centimeter (cm)
inch (in.) 25.4 millimeter (mm)
foot (ft) 0.3048 meter (m)
mile (mi) 1.609 kilometer (km)
acre 4,047 square meter (m2)
square foot (ft2) 0.09290 square meter (m2)
square inch (in2) 6.452 square centimeter (cm2)
section (640 acres or 1 square mile) 259.0 square hectometer (hm2)
square mile (mi2) 2.590 square kilometer (km2)
gallon (gal) 3.785 liter (L)
gallon (gal) 0.003785 cubic meter (m3)
million gallons (Mgal) 3,785 cubic meter (m3)
billion gallons (Bgal) 3,785,000 cubic meter (m3)
cubic foot (ft3) 0.02832 cubic meter (m3)
acre-foot (acre-ft) 1,233 cubic meter (m3)
acre-foot/acre (acre-ft/acre) 0.3048 cubic meter per square meter (m3/m2)
acre-foot per year (acre-ft/yr) 1,233 cubic meter per year (m3/yr)
cubic foot per second (ft3/s) 0.02832 cubic meter per second (m3/s)
gallon per minute (gal/min) 0.06309 liter per second (L/s)
gallon per day (gal/d) 0.003785 cubic meter per day (m3/d)
million gallons per day (Mgal/d) 0.04381 cubic meter per second (m3/s)

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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