single area (or multiple areas) of land and/or water, or a single volume (or multiple volumes) of space
Note 1 to entry: A single area is the norm and multiple areas are the exception.
Note 2 to entry: Spatial units are structured in a way to support the creation and management of basic administrative units.
Note 3 to entry: This International Standard [ISO 19152:2012] supports either 2-dimensional (2D), 3-dimensional (3D), or mixed (2D and 3D) representations of spatial units, which may be described in text (“from this tree to that river”), or based on a single point, or represented as a set of unstructured lines, or as a surface, or as a 3D volume.
Note 4 to entry: In addition to spatial units represented by a single point, text, or a set of unstructured lines, a spatial unit may have an area equal to zero for administrative reasons.
ORIGIN: ISO/TC 211 Glossary of Terms - English (last updated: 2017-10-19)