Join Date: Jul 2006
Location: Port Perry, Ontario, Canada
I don't have an Oregon 300 but have used Garmin eMap (non-routeeable), 60Cx and currently have a Zumo 660. I have used Mapsource for about 10 years.
I don't understand your comments about routes being uneditable. Mapsource isn't the most intuitive software, but you certainly can edit routes quite easily. You can either use the route tool to add to a route, or can move route segments by clicking on the route and moving the segment to a new turnpoint. On the GPS (talking 60Cx and ZUmo 660) you can edit the route as well by adding waypoints anywhere in the route list. I have edited routes on the fly on the GPS as well as using Mapsource. Are you sure you are on a route and not a track? They are different.. a track should be followed exactly, while a route will (as you say) navigate between way points. I edit routes all the time and have edited routes while on 10 day rides.
Breaking down routes makes sense, and different GPS units can only handle certain sizes of route. My 60CX could not handle nearly as large a route as the Zumo. However, I have found that if I am in the middle of a route and continue on, once it realizes that I am past the last waypoint it will continue to navigate along the route just fine.
One further note: if you are using any program to create a route and then transfer it, and the mapset is not excatly the same, you may find that slight differences can make the routing add a lot of extra turns. I used to use the exellent program "Gmap to GPX" before the program broke and created large routes on it. When transferring to GPX format the turn points might be off slightly, say just past the exit of a ramp, so Mapsource would (quite properly) route you to the next exit and back to use the ramp properly. It wasnt a fault of Mapsource as the turnpoint would be just after the ramp exit. (This is one example but there were several little things like that to what for.)