Implements algorithms for terrestrial, mobile, and airborne lidar processing, tree detection,
segmentation, and attribute estimation (Donager et al., 2021)
<doi:10.3390/rs13122297>, and a hierarchical patch delineation algorithm
'PatchMorph' (Girvetz & Greco, 2007) <doi:10.1007/s10980-007-9104-8>. Tree
detection uses rasterized point cloud metrics (relative neighborhood density and
verticality) combined with RANSAC cylinder fitting to locate tree boles and estimate
diameter at breast height. Tree segmentation applies graph-theory approaches inspired
by Tao et al. (2015) <doi:10.1016/j.isprsjprs.2015.08.007> with cylinder fitting
methods from de Conto et al. (2017) <doi:10.1016/j.compag.2017.07.019>. PatchMorph
delineates habitat patches across spatial scales using organism-specific thresholds.
Built on 'lidR' (Roussel et al., 2020) <doi:10.1016/j.rse.2020.112061>.
| Version: |
1.0.2 |
| Depends: |
R (≥ 4.0.0), lidR (≥ 4.2.0) |
| Imports: |
Rcpp (≥ 1.0.13), conicfit, FNN, RANN, cppRouting, sf, terra, sfheaders, Rfast, geometry, dplyr, mathjaxr, data.table |
| LinkingTo: |
lidR, RcppArmadillo, Rcpp (≥ 1.0.13), RcppEigen, BH |
| Suggests: |
testthat (≥ 3.0.0), magick, rgl, rstac |
| Published: |
2026-02-03 |
| DOI: |
10.32614/CRAN.package.spanner |
| Author: |
Andrew Sanchez Meador
 [aut, cre,
ctb],
Jonathon Donager
[aut, ctb],
Blackburn Ryan
[aut, ctb],
Cannon Jeffery
[ctb],
Tiago de Conto [ctb, cph] (Author of included TreeLS code),
Keith O'Hara [ctb, cph] (Author of included OptimLib code) |
| Maintainer: |
Andrew Sanchez Meador <Andrew.SanchezMeador at nau.edu> |
| License: |
GPL-3 |
| URL: |
https://github.com/bi0m3trics/spanner |
| NeedsCompilation: |
yes |
| Citation: |
spanner citation info |
| Materials: |
README, NEWS |
| CRAN checks: |
spanner results |