Global Triangular and Penta-Hexagonal Grids Based on Tessellated Icosahedra
The face centers of an icosahedral grid object
Construct a penta-hexagonal icosahedral grid
Add a sf object to a predefined slot in a trigrid or hexagrid ob...
Add a SpatialPolygons object to a predefined slot in a trigrid or ...
Rotation of trigrid and hexagrid objects
Locate grid faces based on their positions on a map
Calculation of distances along arcs
Calculation of distance matrices along arcs
Calculation of point coordinates along an arc
Function to plot a set of great circle arcs between points
Conversion of 3d Cartesian coordinates to polar coordinates
Spherical convex hull.
Lengths of grid edges
The edges of a 3d object
Extraction from a gridlayer using indices
A facelayer linked to a trigrid or hexagrid object
The face names of a trigrid or hexagrid object
Methods of 3D face plotting.
Icosahedral grid-based density estimation
Create or instantiate an graph class graph from the faces of an icos...
Labels of grid vertices, faces and edges.
Display the names of the grid elements in 3d plots.
Guides for 3d spherical plotting.
Legend for a heatmap with predefined colors.
Global Triangular and Hexa-Pentagonal Grids Based on Tessellated Icosa...
The number of faces in a trigrid or hexagrid class object.
Lines method for the trigrid and hexagrid classes
Methods of 3d line plotting
Basic lookup function of coordinates on an icosahedral grid
The face names in a facelayer class object
Add an igraph object to a predefined slot in an icosahedral grid
Faces occupied by the specified object
Extracting and setting the grid orientation
Plot method for the trigrid, hexagrid or facelayer classes
3d plotting of an icosahedral grid, its subset or a data layer
Conversion of polar coordinates to 3d Cartesian coordinates
Position of face centers and vertices on a grid
Resampling of data involving a trigrid or a hexagrid object.
Random point generation on the surface of a sphere
Create a SpatialLines class object from an icosahedral grid
Spatial polygons from an icosahedral grid
Subsetting an icosahedral grid or data layers organized with them
Areas of grid cell surfaces
Surface centroid point of a spherical point cloud
Translating an icosahedral grid object in 3d Cartesian space
A triangular icosahedral grid
Shape distortions of the triangular faces and subfaces
Extract and replace values from a gridlayer-derived object (e.g. `link...
The vertices of an icosahedral grid object
The neighbouring faces of faces in an icosahedral grid
Implementation of icosahedral grids in three dimensions. The spherical-triangular tessellation can be set to create grids with custom resolutions. Both the primary triangular and their inverted penta-hexagonal grids can be calculated. Additional functions are provided that allow plotting of the grids and associated data, the interaction of the grids with other raster and vector objects, and treating the grids as a graphs.