https://thornpass.icu/ GPX trail analysis for the command line en-us https://thornpass.icu/blog/v1-2-released.html https://thornpass.icu/blog/v1-2-released.html Tue, 14 Apr 2026 12:00:00 +0000 ThornPass 1.2: elevation smoothing and segment export https://thornpass.icu/blog/gpx-parsing-gotchas.html https://thornpass.icu/blog/gpx-parsing-gotchas.html Fri, 30 Jan 2026 12:00:00 +0000 GPX parsing gotchas you won't find in the spec