This information is historic and only relevant to X-Plane 10 and earlier
This specification defines all fixes (also known as intersections) X-Plane 10. The effect of this data is to:
- Allow these fixes to be selected in X-Plane’s GPS and FMC systems.
- Display the fixes on X-Plane’s charts.
BASIC CONCEPTS
- Latitudes and longitudes are described in a decimal notation (eg. 20.12345678).
- A latitude of 50 degrees 30 minutes south would be defined as -50.50000000
- North latitudes and east longitudes are positive. South latitudes and west longitudes are negative.
- Unlike other data files, no ‘row codes’ are used for fix data, since the file contains just one type of data.
FILE CHARACTERISTICS
The earth_fix.dat files are plain text files:
- Fields in the data can be separated by one or more white space (space, tab) characters.
- By default, the files are generated so that columns of data are consistently aligned, but this is not required.
FILE STRUCTURE
- In common with most other X-Plane data file specification, header rows of data define the origin (“I” = PC or “A” = Mac) of a particular copy of a file, and define the file specification version. The file specification may be followed by a reference to a sequential release data cycle and build number for the data, and a copyright message.
- Subsequent rows of data define each nav-aid. Sequence is not important, but by default this file is sorted by row code, then by nav-aid name.
- The file is terminated by a ‘99’.
EXAMPLES
Here is example data for a fix:
37.428522 -097.419194 ACESI
DEFINITION OF DATA FIELDS
| Meaning of example fix data (fix.dat) | |
| Fix example | Example Usage |
| 37.428522 | Latitude of NDB in decimal degrees. Eight decimal places supported. |
| -097.419194 | Longitude of NDB in decimal degrees Eight decimal places supported. |
| ACESI | Name of fix. Usually five characters. Unique within an ICAO region. |