@Steve-Jarrell said:
@John-S-Parry The general consensus is for the most compatibility between MRA and Garmin devices you should use the HERE maps when you're saving your .gpx files from MRA to be used by the Garmin. This is discussed in a number of threads including this one.
Many moons ago withe the earlier Garmin GPS devices, there was a more-or-less a direct compatibly between Basecamp and the GPS units. With the XTs, that HERE route calculation Equivalency has slowly degraded. In the years I used the XT, it wasn’t unusual to find my route to recalculate slightly different from what I developed in BC. It happened enough where I had to always double check after route transfer, and then adjust shaping points to get the platforms in sync.
The fact is that MRA HERE and Garmin HERE are not identical, and suffer the same occasional calculation differences. It’s not a debatable point. I can show you several routes I’ve developed in Routeplanner HERE that needed required additional shaping points to calculate correctly on the XT side.
So, you can argue that MRA HERE is closer, but this isn’t horseshoes or hand grenades. The development platform (MRA Routeplanner) either calculates 100% the same as the GPS device, or it doesn’t.
The forum is littered with endless problems associated with HERE. If you like the search function, check that out yourself.
With route creation, it comes down to taking responsibility for overloading shaping points so that the calculation routines have no choice but to calculate the way you want. I think you understand that from what I read in your posts. In Routeplanner, I have found OSM to be a terrific base map for route creation. Dozens of complex routes successfully created and executed tells me so. Overload with shaping points, and it simply works without the drama that sometimes gets inserted by MRA HERE.
I hope this explains where I’m coming from.