USGS - science for a changing world

Open-File Report 2007–1390

Open-File Report 2007–1390

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Conversion Factors, Datums, and Abbreviations

Conversion Factors

Multiply By To obtain
millimeter (mm) 3.937 × 10-2 inch
centimeter (cm) 3.937 × 10-1 inch
meter (m) 3.281 foot (ft)
square kilometer (km2) 3.861 × 10-1 square mile
liter (L) 2.642 × 10-1 gallon
milligram (mg) 3.527 × 10-5 ounce, avoirdupois

Temperature in degrees Celsius (°C) may be converted to degrees Fahrenheit (°F) by using the following equation:

(F=1.8 °C) + 32.


Vertical coordinate information is referenced to the North American Vertical Datum of 1929 (NAVD29).

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD83).


Abbreviation Meaning
λ wavelength
µg microgram
µS/cm microSeimens per centimeter
ADEC Alaska Department of Environmental Conservation
ASC Alaska Science Center
Dis IT Dissolved incremental titration
Dis tot IT Dissolved total incremental titration
Dis fet Dissolved fixed-end titration
DOC Dissolved Organic Carbon
EMAP Environmental Monitoring and Assessment Program
ENRI Environmental Research Institute
ICP-AES Inductively coupled plasma-atomic emission spectrometric
ICP-MS Inductively coupled plasma-mass spectrometer
mL milliliter
NRP Nation Research Program
SUVA Specific Ultra Violet Absorbance
UAA University of Alaska, Anchorage
USEPA U.S. Environmental Protection Agency
USGS U.S. Geological Survey
UV Ultraviolet-Visible Light
UV-Vis Ultraviolet-Visible Light Absorption Analyses

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