This format can...
This format reads route files from many DeLorme mapping products. It supports the anr, rte, and rtd formats as either tracks or routes.
All options only apply to route files from newer (anr) versions of DeLorme software; older versions didn't store the turn information with the route.
Keep turns if simplify filter is used.
This option only makes sense in conjunction with the 'simplify' filter. It ensures that the route simplification process will remove the points corresponding to turns only after it has removed all other route points.
Only read turns; skip all other points.
This option causes GPSBabel to read only the waypoints associated with named turns. This should create a list of waypoints that correspond to the itinerary from Street Atlas.
Split into multiple routes at turns.
This option causes GPSBabel to create separate routes for each street, creating a new route at each turn point. For obvious reasons, 'split' cannot be used at the same time as the 'turns_only' or 'turns_important' options.
Read control points as waypoint/route/none.
This option lets you read the control points (start, end, vias, and stops) for your route as well as the route itself. The default for this option is 'none', which won't read the control points. You may also specify 'waypoints', which reads the control points as waypoints, or 'route', which creates an extra route named 'control points' containing just the control points in order. Note that if your goal is to create an arc or other CSV file, you should use 'none' (or not use this option, which is the same thing.)
Synthesize track times.
This option causes GPSBabel to read the route as if it were a track, synthesizing times starting from the current time, using the estimated travel times specified in your route file (you can change your travel speeds in the DeLorme product you used to create the route file.)