DATA MODEL STANDARDS
This set of standards builds on the domain reference model of ISO 19101. It provides a family of
abstract conceptual schemas for describing the fundamental components of features as elements of
geographic information. ISO 19109 specifies a general feature model for integrating these
components into features and provides rules for doing so in an application schema. ISO 19107
specifies UML classes for representing the spatial characteristics of features as composites of
geometric and/or topological primitives. ISO 19108 does the same for the temporal characteristics of
features and also specifies classes for describing relevant temporal reference systems. ISO 19123
provides a schema for an alternative representation of spatial information as a coverage, in which
non-spatial attributes are assigned directly to geometric objects rather than to features composed of
such objects. ISO 19141 extends ISO 19107 to support the description of moving geometric objects.
ISO 19137 provides a profile of ISO 19107 that is limited to describing features as simple geometric
primitives of 0, 1, or 2 dimensions