ISO 19123-1:2023

Overview

ISO 19123-1:2023 is the foundational international standard for describing the conceptual schema of coverages within the field of geographic information. Published by ISO, this standard provides a high-level, implementation-independent model for representing “coverages”-mappings from a spatial, temporal, or spatiotemporal domain to associated attribute values of a consistent type. These coverages are core structures in many domains, including remote sensing, meteorology, environmental monitoring, and mapping applications such as topography and vegetation.

ISO 19123-1:2023 updates and replaces ISO 19123:2005, focusing on rigorous definitions, direct relationships between domains and attribute ranges, and compatibility with related standards. Unlike implementation standards, this document sets out the abstract principles and schema without constraining how they are technically realized in software or data systems.

Key Topics

• Definition of Coverages: Establishes a coverage as a function that assigns values from a range to every point in its domain, which may include space, time, or other dimensions (including parametric axes).
• Coverage Domain and Range: Outlines the structure of the domain (i.e., points, lines, polygons, meshes, grids, solids) and its separation from the attribute range, which is handled by implementation-specific standards.
• Types of Coverages: Recognizes point clouds, grids (regular and irregular), meshes, triangulated irregular networks (TINs), and polygon sets as common instantiations of coverage domains.
• Discrete vs. Continuous Coverages: Distinguishes coverages that provide values only at defined positions (discrete) from those supporting interpolation between positions (continuous), allowing for hybrid models.
• Coordinate Reference Systems (CRS): Emphasizes the role of coordinate reference systems, supporting spatial, temporal, and parametric axes-enabling multi-dimensional coverage modeling.
• Conceptual Model: Provides an abstract interface for coverages, allowing for broad extensibility and interoperability while leaving specific data structures to implementation standards.

Applications

ISO 19123-1:2023 is widely relevant across various sectors that need rigorous management of spatial and temporal information:

• Remote Sensing: Represents satellite imagery, sensor grids, and point clouds for Earth observation.
• Meteorology: Captures atmospheric properties, temperature maps, and time series data for weather analysis.
• Environmental Science: Models elevation, soil composition, water depth, and vegetation gradients over regular or irregular spatial supports.
• Mapping and Geospatial Analysis: Underpins spatial datasets from land-use maps to 3D city models and supports analytical tasks such as interpolation and spatial querying.
• Data Interoperability: Facilitates data sharing and exchange among agencies and systems by providing a common abstract schema, thus supporting integration and comparison of heterogeneous geospatial datasets.

Related Standards

ISO 19123-1:2023 is designed to work seamlessly within the broader ISO 19100 Geographic information series and related international standards:

• ISO 19103 - Conceptual schema language (providing the modeling foundation).
• ISO 19107 - Spatial schema (geometry and topology description).
• ISO 19111 - Referencing by coordinates (coordinate reference systems, axes, and transformations).
• ISO 19123-2 - Coverage Implementation Schema (technical implementation based on this conceptual schema).
• ISO 19123-3 - Processing on coverages (operations and manipulation of coverage data).

By adopting ISO 19123-1:2023, organizations ensure that their spatial and temporal data infrastructures are built on robust, interoperable, and extensible principles, aligning with global best practices in geographic information management. This standard is essential for anyone developing or utilizing complex geospatial datasets, geospatial software, or data exchange platforms.