Absolute Location - A location in geographic space given with respect to a known origin and standard measurement system, such as a coordinate system.
Category: - GIS

Accuracy - The validity of data measured with respect to an independent source of higher reliability and precision.
Category: - GIS

Adjacency - The topological property of sharing a common boundary or being in immediate proximity.
Category: - GIS

Area - A two dimensional (area) feature represented by a line that closes on itself to form a boundary.
Category: - GIS

Attribute - A numerical entry that reflects a measurement or value for a feature. Attributes can be labels, categories, or numbers; they can be dates, standardized values, or field or other measurements. An item for which data are collected and organized. A column in a table or data file.
Category: - GIS

Base Layer - A GIS data layer of reference information, such as topography, road network, or streams, to which all other layers are referenced geometrically.
Category: - GIS

Buffer - A zone around a point, line, or area feature that is assumed to be spatially related to the feature.
Category: - GIS

Centroid - A point location at the center of a feature used to represent that feature,
Category: - GIS

Choropleth Map - A map showing numerical data (but not simply "counts") for a group of regions by (1) grouping the data in classes and (2) shading each class on the map.
Category: - GIS

Connectivity - The topological property of sharing a common link, such as a line connecting two points in a network.
Category: - GIS