GIS Dictionary

The point at which a satellite traveling south to north crosses the equator.

[data transfer] Acronym for American Standard Code for Information Interchange. The de facto standard for the format of text files in computers and on the Internet that assigns a 7-bit … Read more

[Internet] Acronym for Active Server Pages. A Microsoft server-side scripting technology that can be used to create and run dynamic, interactive Web applications, which are typically coded in JScript, JavaScript … Read more

[programming] A Microsoft-created programming framework built on top of the common language runtime (CLR) that can be used on a Windows server to create Web applications in a variety of … Read more

1 [analysisgeoprocessing] The compass direction that a topographic slope faces, usually measured in degrees from north. Aspect can be generated from continuous elevation surfaces. For example, the aspect recorded for … Read more

[hardware] The ratio of the width of an image to its height. The aspect ratio of a standard computer monitor is 4:3 (rectangular)

[software] A package of software and its associated resources. For example, an ArcGIS Win32 assembly will typically include executables, DLLs, object libraries, registry files, and help files for a unit … Read more

A type of operator that assigns the result of an expression to an output, usually a raster, for storage.

[ESRI software] In Survey Analyst – Cadastral Editor, a feature class that uses the cadastral fabric as a basemap, and has been associated with cadastral fabric. Associated feature classes can … Read more

[computing] In UML, the relationship between two classes. In an association, instances of the classes in question usually exist together, but can exist on their own.

[surveying] A bearing measured from an arbitrarily chosen reference line called an assumed meridian.

[astronomy] An instrument that measures the vertical angle between a celestial body and the horizontal plane at an observer’s position. The astrolabe was replaced by the sextant in the fifteenth … Read more

[data editing] Not synchronous; that is, not occurring together or at the same time.

1 [programming] In programming, a set of actions or events that may occur simultaneously. For example a program that launches another program, then continues execution while the other program is … Read more