Modern Classes for Tracking and Movement Data R package sftrack version 0.5.5 CRAN Task View: Tracking (https://CRAN.R-project.org/view=Tracking) Modern classes for tracking and movement data, building on 'sf' spatial infrastructure, and early theoretical work from Turchin (1998, ISBN: 9780878938476), and Calenge et al. (2009) <doi:10.1016/j.ecoinf.2008.10.002>. Tracking data are series of locations with at least 2-dimensional spatial coordinates (x,y), a time index (t), and individual identification (id) of the object being monitored; movement data are made of trajectories, i.e. the line representation of the path, composed by steps (the straight-line segments connecting successive locations). 'sftrack' is designed to handle movement of both living organisms and inanimate objects. Software Depends: R (>= 3.2.0) Imports: sf Suggests: testthat (>= 2.1.0), utils, ggplot2, adehabitatLT, knitr, geosphere, scales, covr, rmarkdown, lwgeom Mathieu Basille <mathieu@basille.org> Comprehensive R Archive Network (CRAN) Matthew Boone [aut] (ORCID: <https://orcid.org/0000-0002-8070-4715>), Rocío Joo [aut] (ORCID: <https://orcid.org/0000-0003-0319-4210>), Mathieu Basille [aut, cre] (ORCID: <https://orcid.org/0000-0001-9366-7127>) MIT + file LICENSE (https://CRAN.R-project.org/package=sftrack/LICENSE) 2026-05-18 application/tgz https://CRAN.R-project.org/package=sftrack doi:10.32614/CRAN.package.sftrack