Geographic Data Files
Geographic Data Files or GDF is a file format for geographic files.
It is much more than a generic GIS standard, because GDF gives rules how to capture the data, how the features, attributes and relations have been defined.
It's primary use is for car navigation systems, but it is very usable for many other transport and traffic applications like Fleet Management, Dispatch Management, Traffic Analysis, Traffic Management, Automatic Vehicle Location etc.
Standardisation
GDF is a European standard that is used to describe and transfer road networds and road related data.
The standard was drawn up by CEN in co-operation with digital map providers, automotive and electronic equipment manufacturers. The outcome of these standardisation efforts (CEN GDF 3.0) has formed the major input to the world standard ISO GDF 4.0, created by ISO/TC204 Sub Working group 3.
See also
