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spanner

Utilities to support landscape-, forest-, and tree-related data collection, manipulation, analysis, modelling, and visualization.
https://github.com/bi0m3trics/spanner

Category: Biosphere
Sub Category: Forest Modeling and Analysis

Keywords

data-visualization ecology forest-analysis landscape-ecology lidar modeling patches point-cloud rcpp rcpparmadillo remote-sensing spatial-analysis tree-segmentation

Keywords from Contributors

ecology forest-analysis landscape-ecology lidar patches point-cloud rcpp rcpparmadillo spatial-analysis tree-segmentation

Last synced: about 21 hours ago
JSON representation

Repository metadata

Utilities to support lidar (airborne, mobile, terrestial) applications at the landscape-, forest-, and tree-scale to facilitate ecologcial data collection, manipulation, analysis, modelling, and visualization.

README.md

spanner


R
DOI
DOI
license

Definition of spanner
1 (chiefly British): WRENCH
2: a wrench that has a hole, projection, or hook at one or both ends of the head for engaging with a corresponding device on the object that is to be turned
3: implements algorithms for terrestrial, mobile, and airborne lidar processing, tree detection, segmentation, and attribute estimation (Donager et al., 2021), and hierarchical patch delineation (Girvetz & Greco, 2007).

Install spanner

Get the latest released version of spanner from github.

remotes::install_github('bi0m3trics/spanner')

Workflows

Terrestrial Lidar Tree Attributes and Segmentation

This package implements the tree detection and segmentation algorithm described in Donager et al. (2021). The algorithm estimates tree locations and DBH by rasterizing individual point cloud values of relative neighborhood density and verticality within a slice of the normalized point cloud around breast height
(1.37 m), then performs individual tree (instance) segmentation following ecological principles for "growing" trees based on input locations in a graph-theory approach. Implementation relies on work of Roussel et al. (2020), Tao et al. (2015), and de Conto et al. (2017).

Citation: Donager, Jonathon J., Andrew J. Sánchez Meador, and Ryan C. Blackburn 2021. Adjudicating Perspectives on Forest Structure: How Do Airborne, Terrestrial, and Mobile Lidar-Derived Estimates Compare? Remote Sensing 13, no. 12: 2297. https://doi.org/10.3390/rs13122297

PatchMorph: Patch Delineation Algorithm

The patchwoRk function implements a patch delineation algorithm [at present it only implements 'PatchMorph' (Girvetz & Greco 2007), which can delineate patches across a range of spatial scales based on three organism-specific thresholds - (1) land cover density threshold, (2) habitat gap maximum thickness (gap threshold), and (3) habitat patch minimum thickness (spur threshold)].

Citation: Girvetz EH, and Greco SE. 2007. How to define a patch: a spatial model for hierarchically delineating organism-specific habitat patches. Landscape Ecology 22: 1131-1142. http://dx.doi.org/10.1007/s10980-007-9104-8

Owner metadata

GitHub Events

Total
Last Year

Committers metadata

Last synced: 5 days ago

Total Commits: 160
Total Committers: 4
Avg Commits per committer: 40.0
Development Distribution Score (DDS): 0.113

Commits in past year: 53
Committers in past year: 3
Avg Commits per committer in past year: 17.667
Development Distribution Score (DDS) in past year: 0.132

Name Email Commits
Andrew Sánchez Meador a****r@n****u 142
JDonager j****r@g****m 9
Jeffery B Cannon 3****n 5
copilot-swe-agent[bot] 1****t 4

Committer domains:

Issue and Pull Request metadata

Last synced: 22 days ago

Total issues: 4
Total pull requests: 6
Average time to close issues: 25 days
Average time to close pull requests: 3 days
Total issue authors: 3
Total pull request authors: 3
Average comments per issue: 7.0
Average comments per pull request: 0.5
Merged pull request: 5
Bot issues: 0
Bot pull requests: 0

Past year issues: 0
Past year pull requests: 3
Past year average time to close issues: N/A
Past year average time to close pull requests: 4 days
Past year issue authors: 0
Past year pull request authors: 2
Past year average comments per issue: 0
Past year average comments per pull request: 1.0
Past year merged pull request: 3
Past year bot issues: 0
Past year bot pull requests: 0

More stats: https://issues.ecosyste.ms/repositories/lookup?url=https://github.com/bi0m3trics/spanner

Top Issue Authors

  • cingularities (2)
  • rdeinin (1)
  • summitbri (1)

Top Pull Request Authors

  • jbcannon (4)
  • Copilot (1)
  • bi0m3trics (1)

Top Issue Labels

  • bug (1)

Top Pull Request Labels

Package metadata

proxy.golang.org: github.com/bi0m3trics/spanner

Dependencies

DESCRIPTION cran
  • data.table * depends
  • lidR * depends
  • magrittr * depends
  • FNN * imports
  • RANN * imports
  • Rcpp * imports
  • Rfast * imports
  • conicfit * imports
  • cppRouting * imports
  • data.table * imports
  • dbscan * imports
  • dplyr * imports
  • igraph * imports
  • lidR * imports
  • lwgeom * imports
  • mathjaxr * imports
  • sf * imports
  • sfheaders * imports
  • stringr * imports
  • terra * imports
  • testthat >= 3.0.0 suggests

Score: -Infinity