Estimate 3D Orientations from 2D Landmarks R package araponga version 1.1.0 Estimates possible 3D orientations of an object from the 2D image coordinates of two landmarks and an approximate camera-object elevation angle. Because a projected 2D angle can be compatible with multiple 3D pitch, yaw, and view-elevation angles, the package returns compatible sets of orientations rather than a single unconstrained estimate. Software Depends: R (>= 4.1.0) Imports: arrow, dplyr, graphics, rlang Suggests: curl, httr, knitr, rmarkdown, testthat (>= 3.0.0) João C T Menezes <jocateme@gmail.com> Comprehensive R Archive Network (CRAN) João C T Menezes [aut, cre, cph] (ORCID: <https://orcid.org/0000-0003-4156-2934>) GPL (>= 3) 2026-07-07 application/tgz https://CRAN.R-project.org/package=araponga doi:10.32614/CRAN.package.araponga