{
  "_id": "6a154cdcacfb0bcc41d59324",
  "Package": "icosa",
  "Title": "Global Triangular and Penta-Hexagonal Grids Based on Tessellated\nIcosahedra",
  "Version": "0.12.0",
  "Authors@R": "c(\nperson(given=\"Adam T.\", family=\"Kocsis\", role=c(\"cre\", \"aut\"),\nemail=\"adam.t.kocsis@gmail.com\", comment=c(ORCID=\"0000-0002-9028-665X\")),\nperson(given=\"Deutsche Forschungsgemeinschaft\", role=\"fnd\"),\nperson(given=\"FAU GeoZentrum Nordbayern\", role=\"fnd\"))",
  "Collate": "zzz.R data.R utils-conversion.R utils-spherical.R\nutils-vectors.R grid-build.R grid-lookup.R grid-move.R\ngrid-subset.R grid-attributes.R grid-graphs.R grid-sp-lines.R\ngrid-sp-polygons.R grid-sf-polygons.R grid-resample.R\ngrid-obj.R data-gridlayer-basic.R data-gridlayer-attributes.R\ndata-gridlayer-groupgen.R data-gridlayer-subset.R\ndata-facelayer-basic.R data-facelayer-graphs.R\ndata-facelayer-resample.R data-grapply.R plot-legend.R\nplot-2d-grid.R plot-2d-data.R plot-rgl-util.R plot-rgl-grid.R\nplot-rgl-facelayer.R plot-rgl-sp3d.R",
  "Description": "Implementation of icosahedral grids in three dimensions.\nThe spherical-triangular tessellation can be set to create\ngrids with custom resolutions. Both the primary triangular and\ntheir inverted penta-hexagonal grids can be calculated.\nAdditional functions are provided that allow plotting of the\ngrids and associated data, the interaction of the grids with\nother raster and vector objects, and treating the grids as a\ngraphs.",
  "Date": "2025-08-28",
  "License": "GPL-3",
  "Encoding": "UTF-8",
  "LazyData": "true",
  "URL": "https://icosa-grid.github.io/R-icosa/",
  "VignetteBuilder": "knitr",
  "RoxygenNote": "7.3.2",
  "NeedsCompilation": "yes",
  "BugReports": "https://github.com/icosa-grid/R-icosa/issues",
  "Maintainer": "Adam T. Kocsis <adam.t.kocsis@gmail.com>",
  "Config/pak/sysreqs": "libabsl-dev cmake libgdal-dev gdal-bin libgeos-dev\nlibglpk-dev libxml2-dev libssl-dev libproj-dev libsqlite3-dev\nlibudunits2-dev",
  "Repository": "https://icosa-grid.r-universe.dev",
  "Date/Publication": "2025-08-29 09:33:22 UTC",
  "RemoteUrl": "https://github.com/icosa-grid/r-icosa",
  "RemoteRef": "HEAD",
  "RemoteSha": "d0db3406166b92ca32cad3c8e13965bd1a56ef4f",
  "Packaged": {
    "Date": "2026-05-26 07:23:20 UTC",
    "User": "root"
  },
  "Author": "Adam T. Kocsis [cre, aut] (ORCID:\n<https://orcid.org/0000-0002-9028-665X>),\nDeutsche Forschungsgemeinschaft [fnd],\nFAU GeoZentrum Nordbayern [fnd]",
  "MD5sum": "c604e186079ee42c4cf61101fc836ae1",
  "_user": "icosa-grid",
  "_type": "src",
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  "_created": "2026-05-26T07:23:20.000Z",
  "_published": "2026-05-26T07:33:48.359Z",
  "_distro": "noble",
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  "_buildurl": "https://github.com/r-universe/icosa-grid/actions/runs/26438227569",
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  "_host": "GitHub-Actions",
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    "message": "More tiny.\n",
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    "email": "adam.t.kocsis@gmail.com",
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    "description": "So am I that I am.",
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  "_tags": [],
  "_topics": [
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    "cpp"
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    "name": "The icosa gridding framework"
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    "source": "https://cranlogs.r-pkg.org/downloads/total/last-month/icosa"
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  "_devurl": "https://github.com/icosa-grid/r-icosa",
  "_pkgdown": "https://icosa-grid.github.io/R-icosa/",
  "_searchresults": 94,
  "_rbuild": "4.6.0",
  "_assets": [
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    "extra/citation.html",
    "extra/citation.json",
    "extra/citation.txt",
    "extra/contents.json",
    "extra/icosa.html",
    "extra/NEWS.html",
    "extra/NEWS.txt",
    "extra/readme.html",
    "extra/readme.md",
    "manual.pdf"
  ],
  "_homeurl": "https://github.com/icosa-grid/r-icosa",
  "_realowner": "icosa-grid",
  "_cranurl": true,
  "_releases": [
    {
      "version": "0.9.80",
      "date": "2017-04-17"
    },
    {
      "version": "0.9.81",
      "date": "2017-04-18"
    },
    {
      "version": "0.10.0",
      "date": "2020-02-17"
    },
    {
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      "date": "2021-01-12"
    },
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      "date": "2024-08-16"
    },
    {
      "version": "0.12.0",
      "date": "2025-08-28"
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  ],
  "_exports": [
    "arcdist",
    "arcdistmat",
    "arcpoints",
    "arcs",
    "CarToPol",
    "cellocator",
    "centers",
    "chullsphere",
    "edgelength",
    "edges",
    "face2nb",
    "facelayer",
    "faces",
    "faces3d",
    "grapply",
    "gridensity",
    "gridgraph",
    "gridlabs",
    "gridlabs3d",
    "guides3d",
    "heatMapLegend",
    "hexagrid",
    "holes",
    "lines",
    "lines3d",
    "locate",
    "newgraph",
    "newsf",
    "newsp",
    "occupied",
    "orientation",
    "orientation<-",
    "patches",
    "plot",
    "plot3d",
    "plot3d.facelayer",
    "plot3d.hexagrid",
    "plot3d.trigrid",
    "PolToCar",
    "pos",
    "resample",
    "rotate",
    "rpsphere",
    "saveOBJ",
    "spacing",
    "SpLines",
    "SpPolygons",
    "subset",
    "surfacearea",
    "surfacecentroid",
    "translate",
    "trigrid",
    "trishape",
    "values",
    "values<-",
    "vertexradius",
    "vertices",
    "vicinity"
  ],
  "_datasets": [
    {
      "name": "hexguide",
      "title": "Tessellation guide to 'hexagrid' objects",
      "object": "hexguide",
      "class": [
        "data.frame"
      ],
      "fields": [
        "total",
        "level1",
        "level2",
        "level3",
        "level4",
        "faces",
        "vertices",
        "meanEdgeLength_deg",
        "sdEdgeLength_deg",
        "meanEdgeLength_km",
        "sdEdgeLength_km",
        "meanArea_km2",
        "sdArea_km2",
        "time",
        "time_sf",
        "size",
        "size_sf",
        "timeLocate_5000",
        "meanSpacing_deg",
        "sdSpacing_deg"
      ],
      "rows": 120,
      "table": true,
      "tojson": true
    },
    {
      "name": "triguide",
      "title": "Tessellation guide to 'trigrid' objects",
      "object": "triguide",
      "class": [
        "data.frame"
      ],
      "fields": [
        "total",
        "level1",
        "level2",
        "level3",
        "level4",
        "faces",
        "vertices",
        "meanEdgeLength_deg",
        "sdEdgeLength_deg",
        "meanEdgeLength_km",
        "sdEdgeLength_km",
        "meanArea_km2",
        "sdArea_km2",
        "time",
        "time_sf",
        "size",
        "size_sf",
        "timeLocate_5000",
        "meanSpacing_deg",
        "sdSpacing_deg"
      ],
      "rows": 120,
      "table": true,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "extract-methods",
      "title": "Extraction from a gridlayer using indices",
      "topics": [
        "[,gridlayer,ANY,missing-method",
        "[,gridlayer,SpatExtent,missing-method",
        "[<-,gridlayer,ANY,ANY-method",
        "[<-,gridlayer-method"
      ]
    },
    {
      "page": "arcdist",
      "title": "Calculation of distances along arcs",
      "topics": [
        "arcdist"
      ]
    },
    {
      "page": "arcdistmat",
      "title": "Calculation of distance matrices along arcs",
      "topics": [
        "arcdistmat"
      ]
    },
    {
      "page": "arcpoints",
      "title": "Calculation of point coordinates along an arc",
      "topics": [
        "arcpoints"
      ]
    },
    {
      "page": "arcs",
      "title": "Function to plot a set of great circle arcs between points",
      "topics": [
        "arcs",
        "arcs,data.frame-method",
        "arcs,matrix-method"
      ]
    },
    {
      "page": "CarToPol",
      "title": "Conversion of 3d Cartesian coordinates to polar coordinates",
      "topics": [
        "CarToPol",
        "CarToPol,data.frame-method",
        "CarToPol,matrix-method",
        "CarToPol,numeric-method"
      ]
    },
    {
      "page": "cellocator",
      "title": "Locate grid faces based on their positions on a map",
      "topics": [
        "cellocator"
      ]
    },
    {
      "page": "centers",
      "title": "The face centers of an icosahedral grid object",
      "topics": [
        "centers",
        "centers,facelayer-method",
        "centers,trigrid-method"
      ]
    },
    {
      "page": "chullsphere",
      "title": "Spherical convex hull.",
      "topics": [
        "chullsphere"
      ]
    },
    {
      "page": "edgelength",
      "title": "Lengths of grid edges",
      "topics": [
        "edgelength",
        "edgelength,trigrid-method"
      ]
    },
    {
      "page": "edges",
      "title": "The edges of a 3d object",
      "topics": [
        "edges",
        "edges,facelayer-method",
        "edges,obj3d-method"
      ]
    },
    {
      "page": "face2nb",
      "title": "Make an spdep-style neighbor list for an icosahedral grid",
      "topics": [
        "face2nb"
      ]
    },
    {
      "page": "facelayer-class",
      "title": "A 'facelayer' linked to a 'trigrid' or 'hexagrid' object",
      "topics": [
        "facelayer",
        "facelayer-class"
      ]
    },
    {
      "page": "faces",
      "title": "The face names of a trigrid or hexagrid object",
      "topics": [
        "faces",
        "faces,gridlayer-method",
        "faces,trigrid-method"
      ]
    },
    {
      "page": "faces3d",
      "title": "Methods of 3D face plotting.",
      "topics": [
        "faces3d",
        "faces3d,facelayer-method",
        "faces3d,hexagrid-method",
        "faces3d,trigrid-method"
      ]
    },
    {
      "page": "grapply",
      "title": "Icosahedral grid-based density estimation Spatial density estimation algorithm based on rotation of icosahedral grids.",
      "topics": [
        "grapply",
        "grapply,data.frame,missing-method",
        "grapply,data.frame,SpatRaster-method",
        "grapply,data.frame,trigrid-method",
        "grapply,matrix,missing-method",
        "grapply,matrix,SpatRaster-method",
        "grapply,matrix,trigrid-method",
        "gridensity"
      ]
    },
    {
      "page": "gridgraph",
      "title": "Create or instantiate an 'graph' class graph from the faces of an icosahedral grid",
      "topics": [
        "gridgraph",
        "gridgraph,facelayer-method",
        "gridgraph,hexagrid-method",
        "gridgraph,trigrid-method"
      ]
    },
    {
      "page": "gridlabs",
      "title": "Labels of grid vertices, faces and edges.",
      "topics": [
        "gridlabs"
      ]
    },
    {
      "page": "gridlabs3d",
      "title": "Display the names of the grid elements in 3d plots.",
      "topics": [
        "gridlabs3d",
        "gridlabs3d,hexagrid-method",
        "gridlabs3d,trigrid-method"
      ]
    },
    {
      "page": "guides3d",
      "title": "Guides for 3d spherical plotting.",
      "topics": [
        "guides3d"
      ]
    },
    {
      "page": "heatMapLegend",
      "title": "Legend for a heatmap with predefined colors.",
      "topics": [
        "heatMapLegend"
      ]
    },
    {
      "page": "hexagrid-class",
      "title": "Construct a penta-hexagonal icosahedral grid",
      "topics": [
        "hexagrid",
        "hexagrid-class"
      ]
    },
    {
      "page": "hexguide",
      "title": "Tessellation guide to 'hexagrid' objects",
      "topics": [
        "hexguide"
      ]
    },
    {
      "page": "holes",
      "title": "Holes of shapes on an icosahedral grid",
      "topics": [
        "holes",
        "holes,facelayer-method",
        "holes,trigrid-method"
      ]
    },
    {
      "page": "icosa",
      "title": "Global Triangular and Hexa-Pentagonal Grids Based on Tessellated Icosahedra",
      "topics": [
        "icosa-package",
        "icosa"
      ]
    },
    {
      "page": "length",
      "title": "The number of faces in a 'trigrid' or 'hexagrid' class object.",
      "topics": [
        "length,gridlayer-method",
        "length,trigrid-method"
      ]
    },
    {
      "page": "lines-methods",
      "title": "Lines method for the 'trigrid' and 'hexagrid' classes",
      "topics": [
        "lines,trigrid-method"
      ]
    },
    {
      "page": "lines3d",
      "title": "Methods of 3d line plotting",
      "topics": [
        "lines3d",
        "lines3d,Line-method",
        "lines3d,Lines-method",
        "lines3d,Polygon-method",
        "lines3d,Polygons-method",
        "lines3d,SpatialLines-method",
        "lines3d,SpatialLinesDataFrame-method",
        "lines3d,SpatialPolygons-method",
        "lines3d,SpatialPolygonsDataFrame-method",
        "lines3d,trigrid-method"
      ]
    },
    {
      "page": "locate",
      "title": "Basic lookup function of coordinates on an icosahedral grid",
      "topics": [
        "locate",
        "locate,hexagrid,matrix-method",
        "locate,trigrid,data.frame-method",
        "locate,trigrid,matrix-method",
        "locate,trigrid,numeric-method",
        "locate,trigrid,sf-method",
        "locate,trigrid,SpatialPoints-method",
        "locate,trigrid,SpatialPointsDataFrame-method"
      ]
    },
    {
      "page": "names",
      "title": "The face names in a 'facelayer' class object",
      "topics": [
        "names,gridlayer-method"
      ]
    },
    {
      "page": "newgraph",
      "title": "Add an igraph object to a predefined slot in an icosahedral grid",
      "topics": [
        "newgraph",
        "newgraph,trigrid-method"
      ]
    },
    {
      "page": "newsf",
      "title": "Add a 'sf' object to a predefined slot in a 'trigrid' or 'hexagrid' object",
      "topics": [
        "newsf",
        "newsf,trigrid-method"
      ]
    },
    {
      "page": "newsp",
      "title": "Add a 'SpatialPolygons' object to a predefined slot in a 'trigrid' or 'hexagrid' object",
      "topics": [
        "newsp",
        "newsp,trigrid-method"
      ]
    },
    {
      "page": "occupied",
      "title": "Faces occupied by the specified object",
      "topics": [
        "occupied"
      ]
    },
    {
      "page": "orientation",
      "title": "Extracting and setting the grid orientation",
      "topics": [
        "orientation",
        "orientation,trigrid-method",
        "orientation<-",
        "orientation<-,trigrid-method"
      ]
    },
    {
      "page": "patches",
      "title": "Patches of shapes on an icosahedral grid",
      "topics": [
        "patches",
        "patches,facelayer-method",
        "patches,trigrid-method"
      ]
    },
    {
      "page": "plot",
      "title": "Plot method for the 'trigrid', 'hexagrid' or 'facelayer' classes",
      "topics": [
        "plot",
        "plot,facelayer,ANY-method",
        "plot,trigrid,ANY-method",
        "plot,trigrid,array-method",
        "plot,trigrid,character-method",
        "plot,trigrid,logical-method",
        "plot,trigrid,numeric-method",
        "plot,trigrid,table-method"
      ]
    },
    {
      "page": "plot3d",
      "title": "3d plotting of an icosahedral grid, its subset or a data layer",
      "topics": [
        "plot3d",
        "plot3d.facelayer",
        "plot3d.hexagrid",
        "plot3d.trigrid"
      ]
    },
    {
      "page": "PolToCar",
      "title": "Conversion of polar coordinates to 3d Cartesian coordinates",
      "topics": [
        "PolToCar",
        "PolToCar,data.frame-method",
        "PolToCar,matrix-method",
        "PolToCar,numeric-method"
      ]
    },
    {
      "page": "pos",
      "title": "Position of face centers and vertices on a grid",
      "topics": [
        "pos"
      ]
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    {
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