6. 1 GPS: Käännä englanninkieliset termit

Common GPS Terms - Accuracy – A measure of how close an estimate of a GPS position is to the truelocation.

Tarkkuus

Bearing – The compass direction from a position to a destination, (also called an

azimuth). In a GPS receiver, bearing usually refers to the direction to a waypoint.

Coordinate Systems – Such as latitude/longitude, represent your position on

the earth to a flat surface like a sale map.

Kompassisuunta

Course – The compass direction you are trying to follow from your starting point

to the point you are trying to reach.
Kurssi

Course Over Ground – see Track

Reitti

Declination Setting - GPS units can be adjusted to the amount of magnetic

declination in the area of use.

Kaltevuusasetus

Differential GPS (DGPS) - An extension of the GPS system that uses landbased

radio beacons to transmit position corrections to GPS receivers. DGPS
reduces the effect of selective availability, propagation delay, etc. and can
improve position accuracy to better than 10 meters.

GPS: n tarkkuuden parantamisjärjestelmä

Direction – The direction between two locations is usually called a bearing,

azimuth, or course.

Suunta

Error – Measurement of horizontal position error in feet or meters based on a

variety of factors including Dilution of Precision (DOP) and satellite signal quality.

Virhe

GOTO – The selected point you wish to travel to or find. It may be a position fix

or part of a route or track.
Kohde

Heading - The direction in which you or your vehicle are moving. For boat or

airplane operations, this may differ from actual Course Over Ground (COG) due

to winds, currents, etc.
Kulkusuunta

Latitude - A position's distance north or south of the equator, measured by

degrees from zero to 90. One minute of latitude equals one nautical mile.
Leveysaste

Location – The actual physical place you occupy. The difference between a

position fix and location is that a location is where you really are and a position fix

is where a GPS unit says you are.
Sijainti

Longitude - The distance east or west of the prime meridian (measured in

degrees). The prime meridian runs from the North Pole to the South Pole,

through Greenwich, England.
Pituusaste

Magnetic Declination – The difference between true north and magnetic north

at a specific location.

Magneettinen kaltevuus

Navigation - The act of determining the course or heading of movement. This

movement could be for a plane, ship, automobile, person on foot, or any other

similar means.

Navigointi

NAVSTAR - The official U.S. Government name given to the GPS satellite

system. NAVSTAR is an acronym for Navigation Satellite Timing and Ranging.

Position fix - The GPS receiver's computed position coordinates.

Satelliitijärjestelmä

Precision – Measure of the “repeatability” of the data. Taking repeated readings

from a point will improve the precision of the sample mean.
Tarkkuus

Route - A group of waypoints entered into the GPS receiver in the sequence you

desire to navigate them.

Reitti

Track - Your current direction of travel relative to a ground position (same as

Course Over Ground).
Reitti

Waypoint/Landmark - Waypoints are locations or landmarks worth recording

and storing in your GPS. These are locations you may later want to return to or
avoid. They may be check points on a route or significant ground features such
as a campsite, the truck, a cultural resource, or a favorite fishing spot).

Waypoints may be defined and stored in the unit manually by taking coordinates
for the waypoint from a map or other reference. This can be done before ever
leaving home. Or more usually, waypoints may be entered directly by taking 
a reading with the unit at the location itself, giving it a name, and then saving the
point.

Maamerkki

Wide Area Augmentation System (WAAS) - A system of satellites and ground

stations operated by the Federal Aviation Authority that provide GPS signal

corrections for better position accuracy for airplanes. WAAS consists of

approximately 25 ground reference stations positioned across the United States

that monitor GPS satellite data. Two master stations, located on either coast,

collect data from the reference stations and create a GPS correction message. A

WAAS-capable receiver can be adapted to ground use and give you a position

accuracy of better than three meters, 95 percent of the time.

Definitions courtesy of Garmin International, Inc.

Laaja - alueinen tarkennusjärjestelmä