[ESRI software] A Web service processed and executed from within an ArcGIS server. Each Web service has a distinct HTTP location (URL). Web access is enabled by default for all ArcGIS Server services, but can be turned off by an administrator.

[software] ArcGlobe is a global three-dimensional visualization and analysis environment as part of the Esri ArcGIS suite (3D analyst), specializing in global datasets and larger study areas.

An abstract technical description of a system or collection of systems. Modern software architectures employ interoperability interfaces to enable enterprises and whole industries to establish coherent, flexible, integrated information flows that can be implemented with heterogeneous but intercommunicating software systems. The OpenGIS Specification defines the interoperability interfaces that make it possible to include geographic information in these information flows. Conceptually based, architecture does not contain the level of detail needed for construction

A user defined area (represented by a bounding box, circle or polygon). Often used as a filter in a query.

Instantaneously recording an image in a single frame.
 

[GIS processing] Aspect is the slope direction on a terrain surface. Aspect is measured clockwise starting North as 0° to 360° North again with flat areas given a value of -1 (or 0 degrees).

named property of an entity

Descriptive information about features or elements of a database. For a database feature like census tract, attributes might include many demographic facts including total population, average income, and age. In statistical parlance, an attribute is a `variable,` whereas the database feature represents an `observation` of the variable.

[data structure] An attribute table stores non-spatial information in columns and rows about geographic data – similar to spreadsheets.

Verification that a potential partner in a conversation is capable of representing a person or organization.

Determination whether a subject is allowed to have the specified types of access to a particular resource.
 

The process of converting maps and drawings into a digital format while reducing or eliminating operator intervention. Scanning is one form of automated conversion. Heads-up digitizing via tracing a raster image displayed on a computer screen is another form.

The use of computer graphics technology to produce maps. May include specialized CAD technology for digitizing and editing map features, and DBMS technology to produce thematic maps.