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Scientific Investigations Report 2008–5135

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2008–5135

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
Length
millimeter (mm) 0.03937 inch (in.)
meter (m) 3.281 foot (ft)
kilometer (km) 0.6214 mile (mi)
Area
square meter (m2) 10.76 square foot (ft2)
square kilometer (km2) 247.1 acre
square kilometer (km2) 0.3861 square mile (mi2)
Volume
cubic meter (m3) 6.290 barrel (petroleum, 1 barrel = 42 gal)
cubic meter per cubic meter (m3/ m3) 1.0 cubic foot per cubic foot (ft3/ ft3)
Flow Rate
millimeter per day (mm/d) 0.03937 inch per day (in/d)
millimeter per year (mm/yr) 0.03937 inch per year (in/yr)
Density
gram per cubic centimeter (g/cm3) 62.4220 pound per cubic foot (lb/ft3)
Power
Watts per square meter (W/m2) 0.005290 BTU per square foot per minute [(BTU/ft2)/min]

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).

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