metrictrails: Processing of GNSS Streams from Sports Watches

Tools to read, clean and standardise GNSS (Global Navigation Satellite System) streams recorded by sports watches and similar devices, with a focus on trail and mountain running. The pipeline reads GPX files, applies a naming convention, sanitises coordinates (Kalman, LOESS, Gaussian kernel or Savitzky-Golay smoothing, and red flags for implausible readings), resamples the trajectory to a uniform spatial resolution derived from the Nyquist criterion, and replaces elevation with values from a Digital Elevation Model. Derived measures include speed, slope, elevation gain and kilometre-effort, Tobler hiking function parameters fitted by quantile regression, comparison between streams, detection of passes along a route and map matching to a known reference trail by dynamic programming. Methods follow Sanchez and Villena (2020) <doi:10.1177/1754337120918975>, Sanchez et al. (2024) <doi:10.1109/ICECET61485.2024.10698606>, Sanchez et al. (2025) <doi:10.1177/17543371251341660> and Martinez, Sanchez and Diaz (2026) <doi:10.1109/ICECET65726.2026.11632531>.

Version:	1.0.0
Depends:	R (≥ 4.1)
Imports:	magrittr, sf, stats, terra, tibble, utils
Suggests:	curl, knitr, rmarkdown, testthat (≥ 3.0.0)
Published:	2026-10-21
DOI:	10.32614/CRAN.package.metrictrails (may not be active yet)
Author:	Raimundo Sanchez [aut, cre]
Maintainer:	Raimundo Sanchez <raimundosanchezu at gmail.com>
BugReports:	https://github.com/raimun2/metrictrails/issues
License:	MIT + file LICENSE
URL:	https://github.com/raimun2/metrictrails
NeedsCompilation:	no
Citation:	metrictrails citation info
Materials:	README
CRAN checks:	metrictrails results

Documentation:

Reference manual:	metrictrails.html , metrictrails.pdf
Vignettes:	From a GPX file to research-grade trail measures (source, R code)

Downloads:

Package source:	metrictrails_1.0.0.tar.gz
Windows binaries:	r-devel: not available, r-release: not available, r-oldrel: not available
macOS binaries:	r-release (arm64): metrictrails_1.0.0.tgz, r-oldrel (arm64): metrictrails_1.0.0.tgz, r-release (x86_64): metrictrails_1.0.0.tgz, r-oldrel (x86_64): metrictrails_1.0.0.tgz

Linking:

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