Tools to Work with Projections R package crstools version 1.0.0 Choose the appropriate map projection for a given application, visualise the resulting distortion, and georeference data from unknown projections. The full functionalities of the package are described in Pozzi et al. (2026) <doi:10.31223/X5K17P> (pre-print). Software Depends: R (>= 3.5.0) Imports: sf, ggplot2, terra, cli, jpeg, rlang Suggests: testthat (>= 3.0.0), knitr, rmarkdown, pastclim, rnaturalearth, rnaturalearthdata, tidyterra, svglite, spelling Andrea Manica <am315@cam.ac.uk> Comprehensive R Archive Network (CRAN) Andrea Manica [aut, cre] (ORCID: <https://orcid.org/0000-0003-1895-450X>), Andrea Pozzi [aut], Cecilia Padilla-Iglesias [aut], Evie Carter [aut], Michela Leonardi [aut], Aramish Fatima [aut], Ondrej Pelanek [aut], Nile Stephenson [aut], Margherita Colucci [aut], Dominik C Jud [aut], Cassandra Gunasekaram [aut] GPL (>= 3) 2026-03-19 application/tgz https://CRAN.R-project.org/package=crstools doi:10.32614/CRAN.package.crstools en-GB