UK NTF (National Transfer Format) is a vector interchange format used
to distribute digital map products from the Ordnance Survey.
A list of digital map products should be available from the Ordnance Survey
web site, somewhere. I used to redistribute the .pdf files for their various
data product guides from here (since they are often hard to find on their
web site), but their "Intellectual Property and Legal" staff asked me not
to, so you will have to dig around on their site to find them if they are
Products I have successfully read:
- Land-Form Panorama
- Address Point
- Code Point
I have not packaged standalone NTF reading source code at this time. The
source code is part of my OGR library,
and can be found in the gdal/ogr/ogrsf_frmts/ntf subdirectory.
Digital National Framework
The Ordnance Survey is working on an overhaul of their digital mapping
management and distribution, and apparently will be distributing data
in DNF (a particular set of OGC GML 2.0 schemas) at some point in the future.