GIS Dictionary

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Ab Ac Ad Ae Af Ag Ai Aj Al Am An Ap Ar As At Au Av Ax Az

alphanumeric grid

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[cartography] A grid of numbered rows and lettered columns (or vice versa) superimposed on a map, used to find and […]

alternate key

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[database structures] An attribute or set of attributes in a relational database that provides a unique identifier for each record

alternate name

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[geocoding] A name for an address element, usually a street name, that is different from the official or most common

altitude

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1 [coordinate systems] The height or vertical elevation of a point above a reference surface. Altitude measurements are usually based

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