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Maps GPS Glossary - B

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bandwidth - The range of frequencies signal can carry.

barranca - A dry ravine or a steep depression between hills.

bar scale - The part of the map used to determine the scale of it. It is also known as linear scale.

baseline - The physical distance between base station and a rover receiver.

basemaps - The maps that are included when buying a GPS unit.

base station - A GPS receiver that is placed at a known location and that is used to collect and broadcast information to rover receivers. It is also known as a reference station.

bathymetric map - Type of map that measures the different depths across an underwater area as an ocean, sea or lake.

bathymetry - The measurement of depth of bodies of water.

bay - A body of water that is extending into the land.

beacon - Radio transmitter that sends signals in all directions. It is also known as non-directional beacon.

bearing - An azimuth; a horizontal direction of a line or direction of travel with true north or true south as a reference.

bench mark - A material object, natural or man-made, with a known elevation or horizontal location. Bench marks can be used as reference points when traveling a route or in determining the elevation of nearby land features.

bias - A systematic error that can cause true measurements to be different from observed measurements.

bitmap image - An image with 1 bit of color information per pixel, also known as a bitmapped image.

Bluetooth - A standard of radio technology that makes it possible to transmit signals over short distances between telephones, computers and other devices.

bogan - Canadian sluggish side stream. It is also known as logan pokelogan.

bosk - A small, wooded area.

bourn - A small stream.

bourne - Same as bourn.

BTGPS - Bluetooth GPS - See Bluetooth.

butte - Strange isolated hill that can sometimes have vertical steep walls and a small and flat top.

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