{"id":22413767,"url":"https://github.com/jsta/irlgraph","last_synced_at":"2025-07-01T05:04:06.974Z","repository":{"id":88675572,"uuid":"42148410","full_name":"jsta/irlgraph","owner":"jsta","description":"Irregular Landscape Graphs to generate accumulated cost surfaces","archived":false,"fork":false,"pushed_at":"2015-12-30T15:31:58.000Z","size":1455,"stargazers_count":1,"open_issues_count":0,"forks_count":0,"subscribers_count":1,"default_branch":"master","last_synced_at":"2025-03-27T03:31:51.609Z","etag":null,"topics":[],"latest_commit_sha":null,"homepage":"","language":"R","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":null,"status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/jsta.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2015-09-09T01:20:23.000Z","updated_at":"2016-05-29T12:25:19.000Z","dependencies_parsed_at":"2023-03-13T18:19:31.435Z","dependency_job_id":null,"html_url":"https://github.com/jsta/irlgraph","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/jsta/irlgraph","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jsta%2Firlgraph","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jsta%2Firlgraph/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jsta%2Firlgraph/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jsta%2Firlgraph/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/jsta","download_url":"https://codeload.github.com/jsta/irlgraph/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/jsta%2Firlgraph/sbom","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":262900086,"owners_count":23381657,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":[],"created_at":"2024-12-05T14:14:32.062Z","updated_at":"2025-07-01T05:04:06.940Z","avatar_url":"https://github.com/jsta.png","language":"R","funding_links":[],"categories":[],"sub_categories":[],"readme":"irlgraph\n======\n\nThe `R` package `irlgraph` provides the functionality to generate accumulated cost surfaces using irregular landscape graphs.\n\n##Installation\n  ```R\n  install.packages('devtools')  # package devtools needed\n  devtools::install_github('jsta/irlgraph')\n  ```\n  \n##Summary\n\n![](inst/doc/irl-construction.png)\n\n**Figure 1: Construction of accumulated cost surfaces using irregular landscape graphs. Panels from left to right represent the process of: identifying graph nodes, Delaunay triangulation, generating partial accumulated cost surfaces, and interpolating to produce full accumulated cost surfaces.**\n\n![](inst/doc/processing-speed.png)\n\n**Figure 2: Comparison of `system.time` processing speed when using regular and irregular graphs to produce accumulated cost surfaces. The performance benefit of irregular graphs becomes apparent with greater numbers of starting nodes.**\n\n![](inst/doc/figure-7.png)\n\n**Figure 3: Directional bias tests of irregular and regular graph approaches to generating accumulate cost surfaces. The `gdistance::geoCorrection` function eliminates directional bias associated with regular graphs.**\n\n##Examples\n**see vignette**\n\n##References\n**Thomas Etherington (2012)**. Least-cost modelling on irregular landscape graphs.\n*Landscape Ecology*\n[journal](http://dx.doi.org/10.1007/s10980-012-9747-y)\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjsta%2Firlgraph","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fjsta%2Firlgraph","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fjsta%2Firlgraph/lists"}