ISO 19109:2025

Current Revision
Geographic information - General feature model and rules for application schema

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ISO 19109:2025

Geographic information - General feature model and rules for application schema

PUBLISH DATE 2025
ISO 19109:2025

This document defines the General Feature Model (GFM) as the metamodel for creating application schemas in the context of geo-information modelling.

The GFM is explained and implemented as rules for creating and documenting application schemas, including principles for the definition of features.

This document is applicable to:

  • conceptual modelling of features and their properties from a universe of discourse;
  • definition of application schemas;
  • general rules for using a conceptual schema language for application schemas;
  • rules for application schemas using UML as the conceptual schema language;
  • transition from the concepts in the conceptual model to the data types in the application schema;
  • integration of standardized schemas from other ISO geographic information standards with the application schema.

This document does not apply to:

  • choice of one particular conceptual schema language for application schemas;
  • definition of any particular application schemas;
  • representation of feature types and their properties in a feature catalogue;
  • representation of metadata;
  • rules for mapping one application schema to another;
  • implementation of the application schema in a computer environment;
  • computer system and application software design;
  • programming.
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