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Glossary of GIS Terms
Algorithm: A set of computing instructions for solving a specific problem
having the following properties (a) finiteness (b) definiteness (c) input (d)
processing (e) output. An algorithm transforms an input data to output
information through the finite processing steps.
Attribute: Non-graphic or descriptive information describing the non-spatial
properties associated with the spatial object modeled as a point, line, or
area element in a GIS.
Autocorrelation: Also known as auto-covariance, is a statistical concepts
expressing the degree to which the value of an attribute at spatially adja-
cent points varies with the distance or