Maps GPS Glossary - K, L
karst - An area of irregular limestone in which erosion has produced fissures, sinkholes, underground streams and caverns.
kinematic GPS - Observations while a receiver is in motion.
knoll - See hillock.
knot - A unit of speed of one nautical mile per hour, equal to 1.15 statute mile per hour (1.85 kilometers per hour).
L1 frequency - One of the two radio frequencies that carries the Coarse Acquisition Code (C/A code), P-Code, and the nav message on 1575.42 MHz. .
L2 frequency - One of the two radio frequencies that carries only the P-Code on 1227.6 MHz. .
LAAS - see Local Area Augmentation System
lagoon - A shallow body of water, especially one separated from a sea by sandbars or coral reefs.
landmark - Important building, monument or place that can be easily recognizable.
latitude - The distance north or south of the equator of a point on the earth's surface.
LBS - Location-Based Services - A service which uses knowledge provided about where a user is located in order to deliver information relevant to the user's position.
leg - The portion of a route between waypoints.
legend - The part of the map where all the symbols that you can find on it have a short description.
levee - An artificially created bank used in areas that are subject to flooding.
lidar - Also called laser radar - A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of pulsed laser light reflected from their surfaces.
Local Area Augmentation System - A specialized type of DGPS to support aircraft landings in a local area (32KM). The first system is scheduled to be operational by late 2006.
location-based services - See LBS.
longitude - The distance east or west of the prime meridian of a point on the earth's surface.
LORAN - Stands for LOng RAnge Navigation and it represents a a grid of radio waves that facilitates accurate position plotting.