Geographic Data Files or 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. Most recent extension expand applicability further towards Pedestrian Navigation, 3-D map rendering, and Advanced Driver Assistance Systems (ADAS).
GDF is commonly used for data interchange in many industries such as Automotive navigation system, fleet management, dispatch management, road traffic analysis, traffic management, Automatic Vehicle Location.
Originated as a flat plain-text file, GDF is not intended to be used directly for any large scale geographic application and normally requires conversion into a more efficient format. Consumability has been increased with most-recent developments for XML and SQL renditions.
The maps in GDF format are provided by many map vendors such as Navteq, TomTom, Mapscape BV, GeoSmart, Automotive Navigation Data, AutoNavi and NavInfo.
Read more about Geographic Data Files: Standardisation
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