SpPolygons

SpPolygons,trigrid-method

SpPolygons,hexagrid-method

The function will create a <code><a href="https://edzer.github.io/sp/reference/SpatialPolygons.html">SpatialPolygons</a></code> class 2d representation of the 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.

Adam Kocsis

icosa

Global Triangular and Penta-Hexagonal Grids Based on Tessellated
Icosahedra

Adam T. Kocsis

Deutsche Forschungsgemeinschaft 

FAU GeoZentrum Nordbayern 

SpPolygons function

<dl><dt>gridObj</dt>
<dd>(<code>trigrid</code> or <code>hexagrid</code>) An icosahedral grid.</dd>
<dt>...</dt>
<dd>Arguments passed to class-specific methods.</dd>
<dt>res</dt>
<dd>(<code>numeric</code>) The number of points inserted between two vertices, or <code>NULL</code>, if this is to be set by the package. The default method increases resolution with lower tessellation values, and is higher for higher absolute latitudes.</dd></dl>

Arguments

The function will create a <code><a href='https://edzer.github.io/sp/reference/SpatialPolygons.html'>SpatialPolygons</a></code> class 2d representation of the icosahedral grid.

Spatial polygons from an icosahedral grid — SpPolygons

<dl>

<dt>gridObj</dt>
<dd>(<code>trigrid</code> or <code>hexagrid</code>) An icosahedral grid.</dd>


<dt>...</dt>
<dd>Arguments passed to class-specific methods.</dd>


<dt>res</dt>
<dd>(<code>numeric</code>) The number of points inserted between two vertices, or <code>NULL</code>, if this is to be set by the package. The default method increases resolution with lower tessellation values, and is higher for higher absolute latitudes.</dd>

</dl>

SpPolygons: Spatial polygons from an icosahedral grid

Description

Usage

Value

Arguments

Examples