How would one describe a feature that has a definable boundary?

A feature with a definable boundary is best described as a discrete feature. Discrete features are distinct, individual entities that can be clearly identified and delineated in space. They have specific locations and boundaries, which can be represented using various geographic information systems (GIS) formats. Examples of discrete features include individual trees, buildings, or parcels of land, all of which can be mapped with clear boundaries separating them from other features.

In contrast, continuous features refer to phenomena that exist over a range and do not have distinct boundaries, such as temperature or elevation gradients. Thematic features are often related to the specific themes or topics that are represented in a dataset and might include layers such as land use or population density, but they may not necessarily imply a clearly definable boundary. Abstract features could suggest generalized representations or concepts not tied to specific geographic limits, which does not align with the notion of having a defined boundary. Hence, the correct classification for a feature with a definable boundary is discrete feature due to its individual and identifiable nature.