# --------------------------------------------
# CITATION file created with {cffr} R package
# See also: https://docs.ropensci.org/cffr/
# --------------------------------------------
 
cff-version: 1.2.0
message: 'To cite package "spanner" in publications use:'
type: software
license: GPL-3.0-only
title: 'spanner: Utilities to Support Lidar Applications at the Landscape, Forest,
  and Tree Scale'
version: 1.0.4
identifiers:
- type: doi
  value: 10.32614/CRAN.package.spanner
abstract: Implements algorithms for terrestrial, mobile, and airborne lidar processing,
  tree detection, segmentation, and attribute estimation (Donager et al., 2021) <https://doi.org/10.3390/rs13122297>,
  and a hierarchical patch delineation algorithm 'PatchMorph' (Girvetz & Greco, 2007)
  <https://doi.org/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) <https://doi.org/10.1016/j.isprsjprs.2015.08.007>
  with cylinder fitting methods from de Conto et al. (2017) <https://doi.org/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) <https://doi.org/10.1016/j.rse.2020.112061>.
authors:
- family-names: Sanchez Meador
  given-names: Andrew
  email: Andrew.SanchezMeador@nau.edu
  orcid: https://orcid.org/0000-0003-4238-8587
- family-names: Donager
  given-names: Jonathon
  email: Jonathon.Donager@gmail.com
  orcid: https://orcid.org/0000-0001-9448-1703
- family-names: Ryan
  given-names: Blackburn
  email: rcblackburn@cornell.edu
  orcid: https://orcid.org/0000-0002-2952-0865
preferred-citation:
  type: manual
  title: 'spanner: Utilities to Support Lidar Applications at the Landscape, Forest,
    and Tree Scale'
  authors:
  - family-names: Sanchez Meador
    given-names: Andrew
    email: Andrew.SanchezMeador@nau.edu
    orcid: https://orcid.org/0000-0003-4238-8587
  - family-names: Donager
    given-names: Jonathon
    email: Jonathon.Donager@gmail.com
    orcid: https://orcid.org/0000-0001-9448-1703
  - family-names: Ryan
    given-names: Blackburn
    email: rcblackburn@cornell.edu
    orcid: https://orcid.org/0000-0002-2952-0865
  year: '2026'
  notes: R package version 1.0.4
  url: https://github.com/bi0m3trics/spanner
repository: https://bi0m3trics.r-universe.dev
repository-code: https://github.com/bi0m3trics/spanner
commit: c55960faaaf0c7437513865cce87e06e4061f6ca
url: https://github.com/bi0m3trics/spanner
date-released: '2026-03-31'
contact:
- family-names: Sanchez Meador
  given-names: Andrew
  email: Andrew.SanchezMeador@nau.edu
  orcid: https://orcid.org/0000-0003-4238-8587
references:
- type: article
  title: 'Adjudicating Perspectives on Forest Structure: How Do Airborne, Terrestrial,
    and Mobile Lidar-Derived Estimates Compare?'
  authors:
  - name: Donager
  - family-names: J.
    given-names: Jonathon
  - family-names: Meador
    given-names: Sánchez
  - family-names: J.
    given-names: Andrew
  - name: Blackburn
  - family-names: C.
    given-names: Ryan
  journal: Remote Sensing
  volume: '13'
  issue: '12'
  year: '2021'
  issn: 2072-4292
  doi: 10.3390/rs13122297
  url: https://doi.org/10.3390/rs13122297