By creating a text file
Before you can create your itinerary file from your list of locations, you need the GPS coordinates (longitude, latitude) for each location. There are companies that can geo-code your addresses and provide you with GPS coordinates and there are also free online tools that you can use to geo-code a list of addresses.
Some of the companies that supply Geo coding services are Geodan, TeleAtlas, Multimap, Google Maps enterprise, Yahoo maps, Microsoft MapPointMap24, Geonames.org, Bridgis BV, GeoAge, BRIGHTi Solutions and Globe Assistant.
Creating the itinerary text file
Itinerary files are very simple files and once your locations have been geo-coded, you can create the file yourself using a simple text editor like Notepad. If you have a large amount of location data held in a spreadsheet or database however, you may need to export it or use any in-house programming or scripting experience that you may have in order to get your data into the required format.
The file format for itineraries is plain ASCII. Each line in the file denotes one point in your itinerary. Itinerary files should be stored in the folder \itn in the root of a TomTom device, and have the extension .itn. Each line consists of the following fields, terminated by bar characters (‘‘|’’):
Currently, the following flags are available:
The navigation device will always guide the driver to the first stopover of the itinerary, via the preceding waypoints if present. Passing a waypoint automatically disables it (ie. its flag gets changed to "1"). Stopovers can be disabled manually only and this,sets the flag for that stopover to "3" and the flags of all the waypoints leading to the stopover to "1". When passing a stopover, the navigation device will guide the driver back to the stopover until the driver disables the stopover.
See Naming your Itinerary before carrying on.
Here’s an example of an itinerary file showing a small itinerary in France. This itinerary consists of a starting point, a waypoint, a stopover and a destination:
80417|4821030|Unnamed road, Gué (Le) (Vendeuvre−Du−Poitou)|4|
98140|4799585|Unnamed road, Boursay|0|
107833|4804246|Unnamed road, Droué|2|
115927|4800041|Unnamed road, Haies (Les) (Bourdonné)|2|
Next step: Test your itinerary.