DeLorme Topo North America 10.0 User Manual page 43

Getting Started
Download
To transfer information from a remote unit, such as a GPS receiver, to a computer.
EDT
Eastern Daylight Time
Easting
The measure of a position relative to the x-axis (horizontal) of a grid system.
Elevation Gain
The difference in elevation from the start of the profile to the end of the profile.
Ephemeris
Data that indicates the position and status of satellites.
EST
Eastern Standard Time
GMT
Greenwich Mean Time; used as the standard of time throughout the world.
GPS
Global Positioning System; a "constellation" of orbiting satellites used to calculate a precise
position on or near the earth's surface.
Grade
Actually percent grade, rise over run (100 x (rise/run)). For example, 6 means that for
every 100 ft, you gain 6 ft in elevation.
HDOP
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