National Transfer Format

The National Transfer Format (NTF) is a file format designed in 1988 specifically for the transfer of geospatial information; it is administered by the British Standards Institution. It is now the standard transfer format for Ordnance Survey digital data. The present version (2.0) conforms to BS 7567.

Not to be confused with National Imagery Transmission Format.

It has three parts:

  • Part 1: Specification for NTF structures
  • Part 2: Specification for implementing plain NTF
  • Part 3: Specification for implementing NTF using BS 6690 (= ISO 8211)
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