LGPStype

LGPStype is a standardized data type used to represent labeled geospatial data within the hypothetical LGP data model. It is designed to encode both geometric shape and associated attribute information in a single, interoperable container.

The LGPStype data model distinguishes two broad categories: vector and raster. A vector value includes a geometry type (Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon) and a coordinate sequence, together with an optional coordinate reference system (CRS) identifier and metadata such as timestamp, accuracy, and source. A raster value stores grid data with dimensions, a CRS, and per-cell attributes or values. Each LGPStype object carries a schema identifier to distinguish different data contracts within the same system.

Semantics and validation: An LGPStype value must declare a CRS and coordinates that comply with the specified geometry type. Polygons must have closed rings and valid topologies when applicable. The model supports geometry collections and heterogeneous attribute dictionaries; validation rules can enforce constraints such as coordinate bounds and date formats.

Interoperability and tooling: LGPStype is designed to map to common geospatial formats, including GeoJSON, Well-Known Text (WKT), and GML, as well as raster formats like GeoTIFF. Libraries provide serialization, deserialization, and validators to import and export LGPStype data.

Applications and limitations: The type is used in research and software that require a unified container for geometry and attributes, including environmental monitoring, urban planning, and asset management. Limitations include potential complexity, performance with large datasets, the need for consistent CRS and data contracts, and versioning considerations.

See also: Geographic Information System, GeoJSON, WKT, GML, raster data, coordinate reference system.