GIS Dictionary

[database structures] An attribute or set of attributes in a database that uniquely identifies each record.

[hardware] A keystroke combination that executes a command that might otherwise require the use of a mouse. For example, Ctrl+C is a well-known keyboard shortcut for copying a selection in … Read more

[intellectual property rights] A unique number in the feature line of a license or authorization file that controls access to software. Keycodes are based on a unique identifier. In ArcEditor … Read more

[ESRI software] In an animation in ArcMap, ArcScene, or ArcGlobe, a snapshot of an object’s properties at a certain time.

1 [computing] A significant word from a document that is used to index or search content. 2 [computing] A word searched for in a search command. Keywords are searched for … Read more

[GPS] Determining the position of an antenna on a moving object such as a ship or an automobile.

[printing] In offset printing, an area that has been defined to cut through or mask specific layers of colored inks. Knockouts are used to ensure that certain ink colors are … Read more

1 [computing] A database of information about a subject, used in expert systems. 2 [ESRI software] In PLTS, a series of tables used for database and cartographic production. Knowledge base … Read more

[surveying] A surveyed point that has an established x,y coordinate value. Known points are used in survey operations to extend survey computations into a project area.

[cartography] A map that uses a neural network algorithm to classify and illustrate associations in complex datasets, and reveal multidimensional patterns. A similar set of methods produces maps referred to … Read more

An interpolation technique in which the surrounding measured values are weighted to derive a predicted value for an unmeasured location. Weights are based on the distance between the measured points, … Read more