GaJayhawk |
07-05-2016 08:58 AM |
A lot of good points have been made in this thread. For me, I've found there are two basic situations I in which use my GPS. The first is to punch in a destination and ask the GPS to "get me there". I don't care about the routing, I just want to get to my destination. The HD GPS does fine with that, and I've had minimal issues. The second is following a pre-planned route, imported from a ride planning source like HD Ride Planner. I've encountered a lot of unintended outcomes with this use of the GPS.
I've recently been on two separate weeklong trips with 8 to 10 bikes, with routes planned in HD Ride Planner, and with the routes uploaded to the several bikes having the Boom GPS. We experienced a lot of "issues" with the route not running as planned, and also, the route running differently on bikes with the same route plan uploaded. We learned a lot about GPS routing and the HD system as a result. There are a lot of variables to manage.
HD Ride Planner is generally easy to use, however, it does not have the option to select planning "preferences" that affect the algorithm that determines a routing. Between Locations and Waypoints, you can shape the route you see on your computer screen, but it is the Ride Planner algorithm that is interpreting those places and shaping the route. There are several good points about how to shape the route in Ride Planner in this string. However, when you export that "route", it is exported from Ride Planner as a .gpx file, and a .gpx file is nothing more than a list of individual Location and Waypoint coordinates. You're are not exporting a "route" per se, you are simply exporting a series of places the importing GPS will route through.
When your GPS device imports your .gpx file, it uses its own routing algorithm to calculate the routing between each location and waypoint. Most GPS's (HD, Garmin, TomTom, Magellan, etc) have slightly different algorithms, and typically have user settings that can modify the routing process. (Shortest, Fastest, etc). So, it is very likely that a single .gpx file uploaded to different GPS devices will produce a variation from the originally intended route across the different GPS devices.
Just to get the same routing on several different bikes with the Boom GPS there are several variables that have to be the same: Software version (current 1.19.2), Map Database (most current is 2014 Q2, but Rushmore bikes range from 2012 Q2 to 2014 Q2), Preferences (Fastest, shortest, etc), Avoidances (Highways, Un-paved, Tollways, etc). If any of those 4 variables aren't the same across all bikes, you'll likely get a variation of the route on the different bikes. Each GPS will get you to the next location or waypoint, but the route calculation may vary because of differences in any of those four.
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