hexify_which_face

Returns the icosahedral face index (0-19) containing the given coordinates.

Provides functions to build and use equal-area hexagonal discrete
global grids using the 'Snyder' 'ISEA' projection ('Snyder' 1992
<doi:10.3138/27H7-8K88-4882-1752>). Implements the 'ISEA' discrete global grid
system ('Sahr', 'White' and 'Kimerling' 2003 <doi:10.1559/152304003100011090>).
Includes a fast 'C++' core for projection and aperture quantization, 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'

hexify_which_face function

<dl><dt>lon</dt>
<dd>Longitude in degrees</dd>
<dt>lat</dt>
<dd>Latitude in degrees</dd></dl>

Arguments

Determine which face contains a point — hexify_which_face

<dl>

<dt>lon</dt>
<dd>Longitude in degrees</dd>


<dt>lat</dt>
<dd>Latitude in degrees</dd>

</dl>

hexify_which_face: Determine which face contains a point

Description

Usage

Value

Arguments

See Also

Examples