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. . . Base Map-The map of the community that depicts cultural features (e.g., roads, railroad, bridges, dams, culverts), drainage features, and corporate limits. Batch Processing-The system by which computers process, without operator intervention, all input for an application at one time to produce the desired input, even though input data might have been collected periodically. Beach Mark (BM)-A permanent monument established by any Federal, State, or local agency, whose elevation and description are well documented and referenced to the National Geodetic Vertical Datum of 1929 or the North American Vertical Datum of 1988. Bit-An abbreviation for binary digit, a number that can have only a value of 0 or }, Block-A group of bytes treated as one unit of information, sometimes called a physical record. ButTer Zoae-An area of specified distance (radius) around a map item or items, Building-See Structure. Byte-A group of bits that can be stored and retrieved as a unit. Cell-The defined geometric shape that stores data or defines an area that is labeled. The most common mapping cell is a square, Also the basic element of spatial information in raster data structures, Ceatroid- The point interior to a polygon whose coordinates are the averages of the corresponding coordinates for all points included in the polygon. Channel-A naturally or artificially created open conduit that periodically or continuously contains moving water or which forms a connecting link between two bodies of water. Chief Executive Officer (CEO)- The official of a community who has the authority to implement and administer laws, ordinances, and regulations for that community. Choropleth Map-A map with shaded or hatched areas. (Choro = place and pleth = value.) Coastal Barrier Resources System (CBRS)-A system of protected coastal areas (including the Great Lakes, The areas within the CBRS are defined as depositional geologic features consisting of unconsolidated sedimentary materials; subject to wave, tidal, and wind energies; and protecting landward aquatic habitats from direct wave attack. TERMS-4 CTP COOlJeratmg Tedltllcaf P,!linel!:;