Each time I create a route in Basecamp and transfer it to the Zumo, the route is drastically different on the Zumo. When I recalculate within the Zumo in custom routes, to shortest route and then back to fastest route, the mileage of the route becomes much closer to the original Basecamp route, but is still not exactly the same (difference of 2 miles over a 40 mile route). Any ideas? The longer the route the worse it gets.
- Zumo 660LM with CN North America NT 2020.20, latest firmware
- Basecamp for Mac 4.8.3 with CN North America NT 2020.20 locally installed
- All avoidances and routing options appear to be the same.
I have used Basecamp in the past few years and have never had this problem, the routes have always matched. This occurred when I updated the maps to a 2019 version earlier this year. I updated the maps again to 2020 (on both the sumo and the computer) and the problem still occurs I have double checked the maps on both and they are the same. I reset the zumo to factory defaults and still no change.