GPSMAP H1 Route Simplification Error

Question

Hello everyone 
 
 I&rsquo;m reaching out to you for your expertise (and I think I&rsquo;m in the right place) because I&rsquo;m running into a major issue that makes the H1 unusable under these conditions. Suspect 
 I want to load four GPX files onto it for the 2026 Tor des Glaciers race (a total of 450 km around the Aosta Valley) 
 It&rsquo;s a self-supported race with no markings, and I actually bought the H1 specifically for this reason. 
 The problem is that after importing the GPX via Basecamp (or Garmin Connect&mdash;the result is the same), the track is significantly altered and obviously unusable. 
 I&rsquo;ve attached two screenshots where you can clearly see that a line is drawn in the H1 instead of following the actual route. 
 Yet in the H1, the route has exactly the same number of waypoints as in the original GPX file. 
 I&rsquo;m also attaching the official GPX file for the race ( https://torxtrail.com/wp-content/uploads/2025/08/TOR450-Tor-des-Glaciers-T1-V7.0-START-Rif.-Sella-UP2025.gpx ) 
 
 It&rsquo;s impossible to set out on a 6-day race with this file without being confident in it. 
 
 I&rsquo;ve tried everything: 
 Converting it to a route, leaving it as a track, converting it to a different GPX file from Basecamp. 
 I tried recreating a tiny portion of the route (just 20 points, as shown in the screenshots). Even when retracing it point by point, it ends up in H1 by drawing straight lines through 
 
 Settings: - Topoactiv map - Small satellite view overlay to save memory while still providing context - I still have more than three-quarters of the storage space available on the GPS - The GPX file contains about 5,600 waypoints in BaseCamp, and it also contains 5,600 on the H1 after import - In BaseCamp, the base map is the one used by the H1 - The route follows the track perfectly in BaseCamp, on Garmin Connect, on my Suunto app, and on VisuGPX (I&rsquo;ve tried everything Very Happy ) - As soon as I sync it to my H1, whether with BaseCamp or Garmin Connect, I get complete nonsense. This is especially problematic because at 3,000 meters at night, a route that cuts straight through the mountain is dangerous Thanks for your help&mdash;I&rsquo;m at my wits&rsquo; end... especially at this price Shocked Translated with DeepL.com (free version)

JungleJim · Accepted Answer

From the course preview screen (like your screenshot) you can click the Navigate button. That will show options on how you want to navigate the course. One option is to enable (or disable) routing. Enabling this will have the H1 recalculate the course using paths and trails of the active map. With routing disabled the navigation experience will be like following a breadcrumb with alerts when you go off course.

JungleJim · Answer

When you import the GPX you provided in Explore app, you get a set of waypoints and a track. The track can be recognized by its icon which shows feet. 
 To convert it to a course, open the track, touch the button with the three dots, and select Copy as Course. You can recognize courses by the icon with two dots connected by a line. 
 See https://support.garmin.com/en-US/?faq=wMr1OiFeBk35uMz4rq4lw5 for more information. 
 Note that there are different ways in getting a course onto the H1: you can use Garmin Connect (with the Connect app), you can use Explore (with the Explore app), you can use integrations between 3rd party platforms like Komoot, or you can copy GPX files directly to the GARMIN\NewFiles folder on the internal storage of the device. If you use the latter method, note that the track in the GPX will be converted to a course when the H1 is powered on.

GPSMAP H1 Route Simplification Error

Top Replies

All Replies