Learn R Programming

⚠️There's a newer version (0.11.1) of this package.Take me there.

icosa (version 0.11.0)

Global Triangular and Penta-Hexagonal Grids Based on Tessellated Icosahedra

Description

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.

Copy Link

Version

Install

install.packages('icosa')

Monthly Downloads

308

Version

0.11.0

License

GPL-3

Maintainer

Adam Kocsis

Last Published

March 23rd, 2023

Functions in icosa (0.11.0)

Labels of grid vertices, faces and edges.

The faces of a 3d object

Methods of 3D face plotting.

[,gridlayer,ANY,missing-method

Extraction from a gridlayer using indices

facelayer-class

A facelayer linked to a trigrid or hexagrid object

Create or instantiate an graph class graph from the faces of an icosahedral grid

Icosahedral grid-based density estimation

Global Triangular and Hexa-Pentagonal Grids Based on Tessellated Icosahedra

Construct a penta-hexagonal icosahedral grid

Tessellation guide to hexagrid objects

names,gridlayer-method

The face names in a facelayer class object

Basic lookup function of coordinates on an icosahedral grid

Guides for 3d spherical plotting.

lines,trigrid-method

Lines method for the trigrid and hexagrid classes

Display the names of the grid elements in 3d plots.

Lengths of grid edges

Methods of 3d line plotting

length,trigrid-method

The number of faces in a trigrid or hexagrid class object.

Add an igraph object to a predefined slot in an icosahedral grid

Resampling of data involving a trigrid or a hexagrid object.

Rotation of trigrid and hexagrid objects

Add a SpatialPolygons object to a predefined slot in a trigrid or hexagrid object

Extracting and setting the grid orientation

Legend for a heatmap with predefined colors.

Add a sf object to a predefined slot in a trigrid or hexagrid object

Plot method for the trigrid, hexagrid or facelayer classes

Shape distortions of the triangular faces and subfaces

The vertices of an icosahedral grid object

Tessellation guide to trigrid objects

Extract and replace values from a gridlayer-derived object (e.g. link{facelayer}).

The edges of a 3d object

Random point generation on the surface of a sphere

Subsetting an icosahedral grid or data layers organized with them

Areas of grid cell surfaces

3d plotting of an icosahedral grid, its subset or a data layer

Position of face centers and vertices on a grid

surfacecentroid

Surface centroid point of a spherical point cloud

The neighbouring faces of faces in an icosahedral grid

Translating an icosahedral grid object in 3d Cartesian space

A triangular icosahedral grid

Faces occupied by the specified object

Calculation of distance matrices along arcs

Calculation of point coordinates along an arc

Calculation of distances along arcs

The face centers of an icosahedral grid object

Spherical convex hull.

Locate grid faces based on their positions on a map

Conversion of 3d Cartesian coordinates to polar coordinates

Conversion of polar coordinates to 3d Cartesian coordinates

Create a SpatialLines class object from an icosahedral grid

Spatial polygons from an icosahedral grid