GIS Dictionary

[data analysis] The computation of an output raster where the output value at each cell location is a function of the value at that cell location and the values of … Read more

[ESRI software] In Survey Analyst for field measurements, the field that is the current target for data entry.

[ESRI software] In ArcCatalog, a top-level item in the Catalog tree that provides quick access to geographic data stored on local disks (including CD-ROMs) or shared on a network. Folder … Read more

[ESRI software] In ArcGIS, a method for placing geodatabase annotation relative to a line or polygon feature. For example, text next to a river may be dragged along it so … Read more

[graphics map display] A single typeface or a set of related patterns representing characters or symbols at one size.

[data structures] The extent (often rectangular) of each raster dataset in the mosaic dataset or image service definition. This outline is not always the extent of each raster dataset but … Read more

[ESRI software] In MOLE, a component of a map display that shows where force units are located so that the map reader can see where forces are the strongest and … Read more

[ESRI software] In MOLE, a type of graphic that represents a military unit (such as Company A, 1st Battalion of the 135th Infantry), equipment, or installation (such as a hospital … Read more

1 [map display] In a scene or display, the area that appears to be closest to an observer. 2 [ESRI software] The area in a raster layer where cells are … Read more

[database structures] An attribute or set of attributes in one table that match the primary key attributes in another table. Foreign keys and primary keys are used to join tables … Read more

[cartography] Lines on a map that approximate the shape of terrain in lieu of actual contours. Form lines do not refer to a true datum and do not necessarily use … Read more

[computing] In computing, the structure and organization of digital information.