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#1
Kartograph

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Does anybody have any experience with GDF Files? Where can I learn more about them?

So far I only found this:

GDF description (pdf)

Is GDF used in the US?

Thanks,

Andreas

#2
GIStummy

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hi andreas,
here's a website with gdf info:
http://www.ertico.co..._data_files.htm

i have heard that TopoGrafix uses gdf files for US roads. all i really know about them is that they are road files used for GPS devices, like your car GPS. i just know this from looking into a gps system for my car, and being a curious GISer wanting to know the about the data.

ok, here is what wikipedia says:
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 for how to capture the data, how the features, attributes and relations have been defined. Its primary use is for car navigation systems, but it is very usable for many other transport and traffic applications like fleet management, dispatch management, road traffic analysis, traffic management, Automatic Vehicle Location etc. Other standards related to geographical data are FGDC, ISO 19110 and ISO 19115.

The maps are typically provided by map vendors such as Tele Atlas and NAVTEQ

GDF is a European standard that is used to describe and transfer road networks 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.

hope this kinda helps.

tricia

#3
Kartograph

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Thaks for the link, studied it thouroughly. But it´s all about GDF 3.x wheras everybody uses 4.x these days. Still very intersting. So, nearly all european car Navigation systems operate on a propritary derivate of a gdf based database. How are things in the US?
Does anybody have any experience with "styling" a map out of a gdf source? Or another, like SDAL(NAVTEQ API/ which could also be based on gdf but interfaced through SDAL)?
The concepts ought to be the same as any data centric automated map generation, I´m mostly wondering how anybody learns about doing it the CarNav industry way. The two links mentioned are nearly everything you find on it.




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