HexGridInfo-class

An S4 class representing a hexagonal grid specification. Stores all
parameters needed for grid operations.

Provides functions to build and use hexagonal discrete global grids
using the 'Snyder' 'ISEA' projection ('Snyder' 1992
<doi:10.3138/27H7-8K88-4882-1752>) and the 'H3' hierarchical hexagonal system
('Uber' Technologies). Implements the 'ISEA' discrete global grid system
('Sahr', 'White' and 'Kimerling' 2003 <doi:10.1559/152304003100011090>).
Includes a fast 'C++' core for 'ISEA' projection and aperture quantization,
an included 'H3' v4.4.1 C library for native 'H3' grid operations, and
'sf'/'terra'-compatible R wrappers for grid generation and coordinate assignment.
Output is compatible with 'dggridR' for interoperability.

Gilles Colling

hexify

Equal-Area Hex Grids on the 'Snyder' 'ISEA' 'Icosahedron'

HexGridInfo-class function

<dl>
<dt><code>aperture</code></dt>
<dd>Character. Grid aperture: "3", "4", "7", or "4/3" for mixed.</dd></dl>
<dt><code>resolution</code></dt>
<dd>Integer. Grid resolution level (0-30 for ISEA, 0-15 for H3).</dd>
<dt><code>area_km2</code></dt>
<dd>Numeric. Cell area in square kilometers.</dd>
<dt><code>diagonal_km</code></dt>
<dd>Numeric. Cell diagonal (long diagonal) in kilometers.</dd>
<dt><code>crs</code></dt>
<dd>Integer. Coordinate reference system (default 4326 = 'WGS84').</dd>
<dt><code>grid_type</code></dt>
<dd>Character. Grid system: "isea" (default) or "h3".</dd>

Slots

HexGridInfo Class — HexGridInfo-class

<dl>
<dt><code>aperture</code></dt>
<dd>Character. Grid aperture: "3", "4", "7", or "4/3" for mixed.</dd>


<dt><code>resolution</code></dt>
<dd>Integer. Grid resolution level (0-30 for ISEA, 0-15 for H3).</dd>


<dt><code>area_km2</code></dt>
<dd>Numeric. Cell area in square kilometers.</dd>


<dt><code>diagonal_km</code></dt>
<dd>Numeric. Cell diagonal (long diagonal) in kilometers.</dd>


<dt><code>crs</code></dt>
<dd>Integer. Coordinate reference system (default 4326 = 'WGS84').</dd>


<dt><code>grid_type</code></dt>
<dd>Character. Grid system: "isea" (default) or "h3".</dd>


</dl>

HexGridInfo-class: HexGridInfo Class

Description

Arguments

Slots

Details

See Also