Additional Detail Information for Turnpoint File Use

Here are some additional fine points for using input task/turnpoint files:

  • You can choose to limit the output to include turnpoints only. For tab delmited or .STX input files, "turnpoints" include any airport marked as a start, finish, or turnpoint.
  • For .CUP input files, a turnpoint is indicated in the comment field, as described in Comments in CUP and STX files.
  • You can choose to retain the names and/or geographical coordinates of airports listed in input files, even if those names or coordinates don't match the FAA NASR data. This is useful in contests so you can be sure the output data matches the input turnpoint file. If the associated options aren't selected, the official FAA name and/or location data will replace that given in the input file.
  • An option is provided to use the turnpoint number as a prefix to turnpoint names in the output files. Turnpoint numbers are taken from the 'NUM' column in STX turnpoint files, or from the first (index) entry on each line of a DAT file. In CUP and NDB input files, turnpoint numbers (if any) are assumed to be prefixed to the name or code.
  • Every airport in an input file should have an associated identifier. If one is not listed as described in Comments in CUP and STX files the system will search for one in the FAA database, by geographical proximity. If one is not found, the airport attribute will be deleted.  See Why are airports sometimes missing in output files? for more information.
  • If a comment in for an airport in an input turnpoint file begins with an exclamation point, that comment will replace the auto-generated one in the output file.
  • If a comment for an airport in an input turnpoint file ends with a tilde ('~') followed by additional information, that information will be appended to the auto-generated comment in the output file.

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