USGS - science for a changing world

Scientific Investigations Report 2007–5012

Scientific Investigations Report 2007–5012

Back to Table of Contents

Conversion Factors, Datums, and Acronyms

Conversion Factors

Multiply By To obtain
foot (ft) 0.3048 meter (m)
mile (mi) 1.609 kilometer (km)
acre 4,047 square meter (m2)
acre 0.4047 hectare (ha)
square foot (ft2) 929.0 square centimeter (cm2)
square mile (mi2) 259.0 hectare (ha)
square mile (mi2) 2.590 square kilometer (km2)
acre-foot (acre-ft) 1,233 cubic meter (m3)
Flow rate
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)
foot per year (ft/yr) 0.3048 meter per year (m/yr)
mile per hour (mi/h) 1.609 kilometer per hour (km/h)

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


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


Concentrations of chemical constituents in water are given in milligrams per liter (mg/L).


Vertical coordinate information is referenced to the National Geodedic Vertical Datum of 1929 (NGVD 29).

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.


Acronym Meaning
ALPS Airborne Lidar Processing System
DEM Digital Elevation Model
DGPS Differential Global Positioning System
EARRL Experimental Advanced Airborne Research Lidar
Lidar Light Detection and Ranging
NASA National Aeronauatics and Space Administration
USGS U.S. Geological Survey
UTM universal transverse mercator

Back to Table of Contents

AccessibilityFOIAPrivacyPolicies and Notices

Take Pride in America logoU.S. Department of the Interior | U.S. Geological Survey
Persistent URL:
Page Contact Information: Publications Team
Page Last Modified: Thursday, 01-Dec-2016 19:42:30 EST