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Geographic Data Files (GDF) is an interchange file format for geographic data. In contrast with generic GIS formats , GDF provides detailed rules for data capture and representation, and an extensive catalog of standard features, attributes and relationships.
The original GDF specification was introduced in 2005 as a new data format to overcome some of the limitations of the European Data Format for Biosignals (EDF). GDF was also designed to unify a number of file formats which had been designed for very specific applications (for example, in ECG research and EEG analysis). [ 2 ]
Map providers generally collect, aggregate and supply data in a well-defined and documented file format that is specifically intended for information interchange, e.g. Navteq uses Standard Interchange Format (SIF) [2] and GDF, while Tele Atlas uses a proprietary form of GDF. [3]
Geographic Data Files (GDF) — An interchange file format for geographic data; Historical formats seldom used today: ArcInfo Coverage - topological data structure used in Arc/INFO from 1981 through 2000; Esri TIN – proprietary binary format for triangulated irregular network data used by Esri; Digital line graph (DLG) – a USGS format for ...
National Transfer Format (NTF) – National Transfer Format (mostly used by the UK Ordnance Survey) Shapefile – open, hybrid vector data format using SHP, SHX and DBF files (by ESRI) Spatial Data File – high-performance geodatabase format, native to MapGuide (by Autodesk) TIGER – Topologically Integrated Geographic Encoding and Referencing
Geographic Data Files (GDF) GeoSPARQL – GML for geospatially-linked data and the Semantic Web; GeoJSON; GML Application Schemas; ISO/TS 19103 – Conceptual Schema Language (units of measure, basic types), ISO 19108 – Temporal schema (temporal geometry and topology objects, temporal reference systems), ISO 19109 – Rules for application ...
EDF, EDF+ – European Data Format; FEF – File Exchange Format for Vital signs, CEN TS 14271; GDF – The General Data Format for biomedical signals; HL7aECG – Health Level 7 v3 annotated ECG; MFER – Medical waveform Format Encoding Rules; OpenXDF – Open Exchange Data Format from Neurotronics, Inc., Gainesville, FL, USA
Map data vendors such as Tele Atlas and Navteq create the base map in a GDF (Geographic Data Files) format, but each electronics manufacturer compiles it in an optimized, usually proprietary manner. GDF is not a CD standard for car navigation systems. GDF is used and converted onto the CD-ROM in the internal format of the navigation system.