- Feature data
geographic information systems, a feature is an entity with a geographic location, typically describable by (for example) points, arcs, or polygons. Carriageways and cadastres are examples of feature data. Features are usually labeled.
The definition of features that are related by membership of a common theme is a "feature type", though there are a number of terms for this characteristic, including "category", "feature class", "group", "layer", "level", "object", and "theme".
"Layer" is the traditional term of choice, but use of this term has declined as data has become more object oriented and less concerned with cartographic layering.
"Feature types" can be used to create a hierarchical structure. For example, a dataset consists of types called highways, streets and lanes. These types may be grouped together under a category called "Roads".
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