National Transfer Format

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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.[1]

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)


  1. ^ British Standard BS 7567: Electronic transfer of geographic information (NTF), 1992.