the HEALPix nodes of the sphere as a list of directions; MATLAB’s HEALPixS2Grid

Syntax

S2G = HEALPixS2Grid(resolution=5*degree)

Nside the power of two nearest to 1/resolution.

S2G = HEALPixS2Grid(nside=8)

12 nside^2 nodes.

Description

The nodes are the centres of the hierarchical equal area iso-latitude pixels of Gorski et al. 2005, in the ring scheme: 12 nside^2 of them, nside a power of two. Without either keyword the resolution is 2.5 degree, nside 32. The result is a plain vector3d, not a grid with a search of its own.

Keywords

keyword default description
resolution None the resolution, nside = 2^round(log2(1/resolution))
nside None the number of divisions of a base pixel’s side, instead of the resolution

Output

S2G vector3d, 12 nside^2 directions

See also

equispacedS2Grid, fibonacciS2Grid, regularS2Grid

Used on

VectorGrids

MATLAB’s HEALPixS2Grid

source

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/HEALPixS2Grid_py.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX 
@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.