eRTG3D: Empirically Informed Random Trajectory Generation in 3-D

Creates realistic random trajectories in a 3-D space between two given fix points, so-called conditional empirical random walks (CERWs). The trajectory generation is based on empirical distribution functions extracted from observed trajectories (training data) and thus reflects the geometrical movement characteristics of the mover. A digital elevation model (DEM), representing the Earth's surface, and a background layer of probabilities (e.g. food sources, uplift potential, waterbodies, etc.) can be used to influence the trajectories. Unterfinger M (2018). "3-D Trajectory Simulation in Movement Ecology: Conditional Empirical Random Walk". Master's thesis, University of Zurich. <>. Technitis G, Weibel R, Kranstauber B, Safi K (2016). "An algorithm for empirically informed random trajectory generation between two endpoints". GIScience 2016: Ninth International Conference on Geographic Information Science, 9, online. <doi:10.5167/uzh-130652>.

Version: 0.7.0
Depends: R (≥ 3.5.0)
Imports: CircStats (≥ 0.2-6), ggplot2 (≥ 3.1.1), pbapply (≥ 1.4-1), plotly (≥ 4.9.0), raster (≥ 2.9-5), rasterVis (≥ 0.45), tiff (≥ 0.1-5)
Suggests: knitr (≥ 1.23), pander (≥ 0.6.3), gridExtra (≥ 2.3), plyr (≥ 1.8.4), rmarkdown (≥ 1.13), sf (≥ 0.7-4), sp (≥ 1.3-1), testthat (≥ 2.1.0), covr (≥ 3.2.1)
Published: 2022-02-25
DOI: 10.32614/CRAN.package.eRTG3D
Author: Merlin Unterfinger ORCID iD [aut, cre], Kamran Safi [ctb, ths], George Technitis [ctb, ths], Robert Weibel [ths]
Maintainer: Merlin Unterfinger <info at>
License: GPL-3
NeedsCompilation: no
Citation: eRTG3D citation info
Materials: README NEWS
CRAN checks: eRTG3D results


Reference manual: eRTG3D.pdf
Vignettes: Included example data sets
Standard workflow of the eRTG3D
Visualization of trajectories
Verification of results
Parallel computation
Coordinate reference system transformations in 3-D
Linkage to the 'sf' package
Trajectory simulations in 2-D
Point cloud analysis


Package source: eRTG3D_0.7.0.tar.gz
Windows binaries: r-devel:, r-release:, r-oldrel:
macOS binaries: r-release (arm64): eRTG3D_0.7.0.tgz, r-oldrel (arm64): eRTG3D_0.7.0.tgz, r-release (x86_64): eRTG3D_0.7.0.tgz, r-oldrel (x86_64): eRTG3D_0.7.0.tgz
Old sources: eRTG3D archive


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