Hoekdata

Hoekdata is a fictional open data standard and project used in this article to illustrate how angular and corner-related measurements can be stored and shared across domains such as geospatial analysis, robotics, and architecture.

The hoekdata data model represents each measurement as a record with contextual metadata. A minimal record includes an identifier, a timestamp, the angle value, the unit (degrees or radians), and an uncertainty estimate, along with references to the sensor or source. Optional fields may include sensor_id, location (lat/long or 3D), reference frame, method of measurement, and quality flags.

Formats and schema: Interchange formats include JSON with a formal JSON Schema, XML with an XSD, and CSV representations. A hoekdata document typically contains a collection of records accompanied by a header that documents provenance, licensing, and versioning.

Interoperability and standards: The design emphasizes compatibility with existing metadata and geospatial standards. Records may reference a coordinate reference system (CRS), link to ISO 19115 metadata, and include URIs for provenance, ensuring traceability and cross-domain reuse.

Applications: Hoekdata is used for mapping building corners and edge features in architectural surveys, aiding robot navigation and SLAM systems, and supporting precision agriculture and cadastral workflows where angular measurements are essential.

History and status: The concept originated in a collaborative project among researchers and practitioners in the early 2020s and is used primarily as an instructional example in discussions of data interoperability and measurement metadata.

See also: angular measurement, geospatial data, data standards, JSON Schema, ISO 19115.