The reduction of the track and the inaccuracies during the recording can lead to strange results which have to be manually corrected within RouteConverter. The track itself has been recorded with the typical GPS inaccuracies and outliers. Moreover, the resulting route has been derived from a track by the substantial reduction of waypoints. The result very often differs from the Google Maps-based routing in RouteConverter. The navigation device is routing between the waypoints using its own road network map, its own routing algorithm and its own routing options. Load the route file into your navigation device and compare it in a high zoom level if the route calculated by the navigation device is the route that you'd expect. Save the file in the route folder of the navigation device, for TomTom devices this the folder itn.Choose a new file name so that the original file is not overwritten by mistake.Choose the file type "TomTom Route 5 (*.itn)" in the save dialog.If you manage to reduce the track to 48 or fewer positions, you've reached the goal. Change the parameters to the options to get a "feel" for the result. Play around a bit with these three options. Mark all positions except every 2 nd position.If the number of positions as in example 92 is still far too high: Mark all redundant positions with a limit of 20 meters with the Douglas-Peucker algorithm.If the number of positions (in the example 438) is still far too high: Check on the map and in the position list that no substantial parts of the track have been omitted. The track should then have significantly fewer positions.Mark all positions within a distance of 200 meters to its predecessor.The following procedure has proven successful: When chosing this menu entry a dialog offers three options to select and delete items if necessary: The function to delete duplicate items offers more control and options: Thus another function of RouteConverter can be used: Manual solution The simple and convenient solution is to switch the map display of RouteConverter to route and to reduce the number of positions with theĪfter that the former track may be reduced to, for example, 843 positions. For this RouteConverter offers two menu items This means, for example, for TomTom devices that a track of 2101 positions has to be reduced to 48 positions to be used as an itinerary for a TomTom device. The navigation devices navigates autonomously between the waypoints using its own map. The reason is that the vast majority of navigation devices is designed to route along the network of public roads and is limited to calculate a route from relatively few waypoints. Thousands to ten thousands positions while routes consist only of a few dozen to one hundred positions. The reason is that typically tracks contain To cover a distance again that has been recorded as a track it is necessary to convert the track into route.
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