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Scientific Investigations Report 2007–5180

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5180

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Conversion Factors and Datums

Conversion Factors

Multiply By To obtain
centimeter (cm) 0.3937 inch (in.)
cubic meters per second (m3/s) 35.31 cubic feet per second (ft3/s)
gram (g) 0.03527 ounce, avoirdupois (oz)
gram per day (g/d) 0.03527 ounce per day (oz/d)
gram per hectare (g/ha) 0.01427 ounce per acre (oz/acre)
gram per year (g/yr) 0.03527 ounce per year (oz/yr)
hectare (ha) 2.471 acre
meter (m) 3.281 foot (ft)
square kilometer (km2) 0.3861 square mile (mi2)

Concentrations of chemical constituents in water are given in microgram per liter (µg/L).

Datums

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

Horizontal coordinate information is referenced to the North American Datum 1983 (NAD 83).

Projections are from the Lambert Conformal Conic (Oregon Lambert Projection).

Water-quality measurements used in this report:

µm micrometer
µg/L microgram per liter
mg/L milligram per liter
mL/g milliliter per gram

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