GIS Dictionary

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spatial weights matrix

[spatial statistics use for geostatistics] A file that quantifies spatial relationships among a set of features. Typical examples of such […]

spatialization

The transformation of complex, multivariate, nonspatial data into a spatial representation located in an information space. The relative positioning of

specialty

[ESRI software] In ArcGIS Network Analyst, an object used in vehicle routing problem (VRP) analysis. A specialty is used to

spectral signature

[physics] The pattern of electromagnetic radiation that identifies a chemical or compound. Materials can be distinguished from one another by

spectrophotometer

[physics] A photometer that measures the intensity of electromagnetic radiation as a function of its frequency. Spectrophotometers are usually used

spectroscopy

[physics] The scientific study of how different chemicals and other substances absorb and reflect different parts of the electromagnetic spectrum.

spelling sensitivity

[geolocating] In geocoding, the degree to which the spelling variation of a street name is allowed during a search for

sphere

[Euclidean geometry] A three-dimensional shape whose center is equidistant from every point on its surface, made by revolving a circle

spherical coordinate system

[coordinate systems] A reference system using positions of latitude and longitude to define the locations of points on the surface

spheroid

1 [Euclidean geometry] A three-dimensional shape obtained by rotating an ellipse about its minor axis, resulting in an oblate spheroid,

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