GIS Dictionary

[graphics map display] A densitometer that can read densities in minute areas, used particularly for studying spectroscopic and astronomical images.

[physics] An instrument for measuring minute lengths or angles.

[physics] One millionth of a meter, represented by the symbol m. Microns are used to measure wavelengths in the electromagnetic spectrum.

[government] A geographic region containing at least one urban area with a population between 10,000 and 50,000, defined by the U.S. Office of Management and Budget for use by federal … Read more

[programming] Acronym for Mobile Information Device Profile. A set of J2ME APIs for wireless devices.

[defense] The military specification for common war fighting symbology; the U.S. military standard that provides guidelines and criteria for the development and display of standard C4I war fighting symbology.

[ESRI software] An ArcGIS extension that optimizes the effectiveness of core ArcGIS as a toolset foundation for military planners and intelligence analysts. Military Analyst is COM-compliant and extensible with ArcObjects.

[symbology] A symbol that imitates or closely resembles the thing it represents, such as an icon of a picnic table that represents a picnic area.

[ESRI software] The smallest and largest scales at which a layer is visible on a map. Scale ranges are used to prevent detailed layers from displaying when zoomed out and … Read more

[ESRI software] A rectangle, oriented to the x- and y-axes, that bounds a geographic feature or a geographic dataset. It is specified by two coordinate pairs: xmin, ymin and xmax, … Read more

[geocoding] In geocoding, the minimum score a potential match record requires to be considered a candidate. This value is adjustable on the Address Locator Properties dialog box.

The shorter axis of an ellipse or spheroid.

1 [geodesy] An angle equal to 1/60 of a degree of latitude or longitude and containing sixty seconds. 2 [mathematics] An angle equal to 1/60 of a degree of arc.

[ESRI software] In Survey Analyst for field measurements, one of two types of lists in the List page. The mixed list has a mixed set of rows that might have, … Read more

In remote sensing, a pixel whose digital number represents the average of several spectral classes within the area that it covers on the ground, each emitted or reflected by a … Read more