Association for Geographic Information (AGI)

A professional body for geospatial information practitioners.

Atomic data

Data that cannot be further divided into smaller components.

Attribute

A characteristic or property of an object.

Audience Extension

Audience extension is a marketing technique that allows you to reach a wider audience than you would normally be able to. This is often done by placing ads on websites that are similar to yours, or by targeting people who have visited similar websites in the past.

Authoritative Data

Data that has been verified as accurate and reliable.

Authoritative Source

A source of data that is considered to be reliable and accurate.

Axis

An imaginary line around which an object rotates.

Axis order

The order in which the axes of a coordinate system are defined.

Band

A band is a layer of an image in which each pixel contains information about a particular physical characteristic within the geographical area that the image represents. Bands are often combined to create images with multiple physical characteristics. Base maps are maps that provide the basic backdrop against which other information can be displayed.

Base maps

A band is a layer of an image in which each pixel contains information about a particular physical characteristic within the geographical area that the image represents. Bands are often combined to create images with multiple physical characteristics. Base maps are maps that provide the basic backdrop against which other information can be displayed.