SpLines

SpLines,trigrid-method

Create a <code><a href="https://edzer.github.io/sp/reference/SpatialLines.html">SpatialLines</a></code> class object from 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.

Adam Kocsis

icosa

Global Triangular and Penta-Hexagonal Grids Based on Tessellated
Icosahedra

Adam T. Kocsis

Deutsche Forschungsgemeinschaft 

FAU GeoZentrum Nordbayern 

SpLines function

<dl><dt>gridObj</dt>
<dd>(<code>trigrid</code> or <code>hexagrid</code>) Icosahedral grid object.</dd>
<dt>...</dt>
<dd>Specific details of the new <code><a href="https://edzer.github.io/sp/reference/SpatialLines.html">SpatialLines</a></code> object.</dd>
<dt>dateLine</dt>
<dd>(<code>logical</code>)Specifies whether <code>NA</code>s should be introduced at the dateline to break the boundaries of the faces. 
Can be switched off by setting it to <code>FALSE</code>.</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 wiht lower tessellation values, and is higher for higher absolute latitudes.</dd></dl>

Arguments

Create a <code><a href='https://edzer.github.io/sp/reference/SpatialLines.html'>SpatialLines</a></code> class object from an icosahedral grid

Create a SpatialLines class object from an icosahedral grid — SpLines

<dl>

<dt>gridObj</dt>
<dd>(<code>trigrid</code> or <code>hexagrid</code>) Icosahedral grid object.</dd>


<dt>...</dt>
<dd>Specific details of the new <code><a href='https://edzer.github.io/sp/reference/SpatialLines.html'>SpatialLines</a></code> object.</dd>


<dt>dateLine</dt>
<dd>(<code>logical</code>)Specifies whether <code>NA</code>s should be introduced at the dateline to break the boundaries of the faces. 
Can be switched off by setting it to <code>FALSE</code>.</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 wiht lower tessellation values, and is higher for higher absolute latitudes.</dd>

</dl>

SpLines: Create a `SpatialLines` class object from an icosahedral grid

Description

Usage

Value

Arguments