GIS Dictionary

[computing] A database that stores related information in a tree-like structure, where records can be traced to parent records, which in turn can be traced to a root record.

[network analysis] A type of network attribute for a network element in a network dataset. Hierarchy can be used during network analysis to assign priority to a network element. For … Read more

[programming] A programming language that uses keywords and statements that are similar to expressions in human language or mathematics and is, therefore, easier for people to comprehend and use. A … Read more

In digital image processing, a spatial filter that blocks low-frequency (long-wave) radiation, resulting in a sharpened image.

1 [map design] Shadows drawn on a map to simulate the effect of the sun’s rays over the varied terrain of the land. 2 [map design] The hypothetical illumination of … Read more

[statistics] A graph showing the distribution of values in a set of data. Individual values are displayed along a horizontal axis, and the frequency of their occurrence is displayed along … Read more

[digital image processing] The redistribution of pixel values in an image so that each range contains approximately the same number of pixels. A histogram showing this distribution of values would … Read more

[ESRI software] In Survey Analyst – Cadastral Editor, a parcel that has been replaced with a new parcel by subdivision, merge, or other means due to a change in the … Read more

[ESRI software] In ArcMap, a user-created reference to a time and date stamp. Historical markers can be used to easily connect to a historical version for a specific date and … Read more

[ESRI software] In ArcMap, a version that a user connects to by using a historical marker or indicating a particular date and time. Once connected, the version provides a read-only … Read more

[ESRI software] A model created, dated, and saved when the application is closed to document the tools and parameter values used for each session. The history model is contained within … Read more