.ITN File Extension

Travel itinerary saved by TomTom Navigator GPS software; saves travel routes and points of interest as an ASCII text file; marks locations as pass-by locations or destination points and flags them as visited or not visited.

Each line in an ITN file consists of the following fields:

1. Field 0 - Longitude in WGS84 format
2. Field 1 - Latitude in WGS84 format
3. Field 2 - Name of the specified point
4. Field 3 - Flag (a specific number)

ITN files are typically stored in "\My Documents\TomTom Navigator Settings" on Windows computers. They can be created by the user or downloaded from the Internet. ITN files saved on a computer can be transferred to a TomTom GPS device via USB. They should be saved in the GPS device's ITN folder.