GIS Dictionary

[coordinate systems] The value for a given surface location that represents an attribute other than position. In an elevation or […]

[astronomy] In astronomy, the point on the celestial sphere directly above an observer. Both the zenith and nadir lie on

[ESRI software] In Survey Analyst for field measurements, a vertical angle that is formed by the intersection of two lines

[linear referencing] In linear referencing, a line event whose from-measure is equal to its to-measure. A zero length line even

[federal government] Acronym for zone improvement plan code. A five-digit code, developed by the U.S. Postal Service, that identifies the

[federal government] An enhanced ZIP Code that consists of the five-digit ZIP Code plus four additional digits that identify a

[spatial analysis] The creation of an output raster in which the desired function is computed on the cell values from

[ESRI software] In ArcGIS Spatial Analyst, the calculation of a statistic for each zone of a zone dataset based on

1 [analysisgeoprocessing] All cells in a raster with the same value, regardless of whether or not they are contiguous. 2

The area in a TIN layer for which values (elevation, slope, and aspect) are calculated. When a TIN layer is

[local government] The application of local government regulations that permit certain land uses within geographic areas under the governments jurisdiction.