Originally Posted by
unterhausen
I probably wouldn't have used the openfietsmaps if I had seen that anyone had problems with them, but I have been using them without issue. I didn't have any significant issues and I rode the same ride as Weatherby. Maybe it was the fact that he was riding so much faster than me. Ok, I have no idea.
The openfietsmaps versions could possibly be OK for calculating a route based on a track sometimes. I'm not sure if I'd trust it always. It's possible that the routing options he was using was part of the problem.
For calculating best routes (without a track), like a car navigation GPS, the Garmins often fail to compute a route or produce wacky routes with the bicycle versions. Part of the problem is how roads in OSM are classified by people and how OSM road classifications get converted to the more limited classifications used in the Garmins.
The normal OSM versions should be more like the Garmin CN maps.
There could be some regional variations in how well the openfietsmap versions work. I know the don't work well for calculated best routes where I live. It would take a lot of work to do more extensive evaluation. I'm not sure if there is a big benefit to using them generally in the US.
The Garmins calculate the routes while you are standing still. As long as you have recalculate off, the route doesn't change. It doesn't depend on speed.