Linjedata

Linjedata is a term used in geospatial data management to denote data that encodes linear features, i.e., geometries formed by sequences of coordinates representing lines or line segments. It is a subset of vector data, alongside point and polygon data. In a typical linjedata dataset, each line feature includes a geometry and a set of attributes such as an identifier, name, type, and sometimes derived measures like length. The geometry is usually stored as LineString or MultiLineString in standard GIS formats and is defined within a coordinate reference system to ensure spatial accuracy and interoperability.

Representations and formats commonly used for linjedata include GeoJSON, Shapefile, GeoPackage, and other vector data standards that support line geometries. Operations on linjedata include measuring length, computing intersections and connections with other features, and network analysis such as routing and shortest-path calculations. Linjedata is essential for modeling infrastructure and natural features that are inherently linear, such as roads, railways, rivers, electrical lines, and utility corridors.

Data quality and processing considerations for linjedata include ensuring line continuity at endpoints, handling multipart lines, simplifying overly dense geometries, and maintaining topological relationships for network analyses. Data quality also depends on accurate CRS specification, consistent attribution, and appropriate handling of geometric precision.

Applications span transportation planning, hydrology, utilities management, and environmental modeling. See also: vector data, line feature, network analysis, GIS, geospatial formats.