GIS Dictionary

[wayfinding] The movements of a person following a route. Locomotion is the physical component of navigation.

[computing] A database file that records changes in data, often used as part of a database restoration.

[mathematics] The power to which a fixed number (the base) must be raised to equal a given number. The three

[mathematics] A string of numbers, constants, variables, operators, and functions that returns a value of true or false.

[ESRI software] An abstract representation of a network, implemented as a collection of hidden tables. A logical network contains edge,

[mathematics] An operator used to compare logical expressions that returns a result of true or false. Examples of logical operators

[analysisgeoprocessing] The process of using mathematical expressions to select features from a geographic layer based on their attributes; for example,

[ESRI software] An edit session on a feature dataset that may last from a few minutes to several months. Long

[spatial statistics use for geostatistics] In a spatial model, coarse-scale variation that is usually modeled as the trend.

The angular distance, usually expressed in degrees, minutes, and seconds, of the location of a point on the earth’s surface

The longitude value that defines the center, and sometimes the origin, of a projection.