GIS Dictionary

[data structures] Data classified relative to a fixed zero point on a linear scale. Mathematical operations can be used on

In digital image processing, enhancing the contrast between features in an image by dividing the values of pixels in one

[3D GIS] A technique that traces imaginary rays of light from a viewer’s eye to the objects in a three-dimensional

[database structures] Acronym for relational database management system. A type of database in which data is organized across one or

[data capture] Data that is displayed immediately, as it is collected. Real-time data is often used for navigation or tracking.

[ESRI software] The time mode in ArcGIS Tracking Analyst in which data is automatically displayed on the map after being

[spatial analysis] The process of taking input cell values and replacing them with new output cell values. Reclassification is often

[database structures] In concurrency management, to merge all modified data in the current database edit session with a second version

1 [database structures] A set of related data fields, often a row in a database, containing all the attribute values

[data conversion] The process of applying a mathematical transformation to an image so that the result is a planimetric image.

1 [mathematics] Characterized by straight lines, usually parallel to orthogonal axes. 2 [map design] A map or image whose horizontal