Tuesday 24 September 2019

Creating geodesic hexagonal global grid in QGIS?


I'm looking to make a geodesic hexagonal global grid based on a icosahedron. Such a grid would need to have 12 pentagons in it as well to be able to fit a sphere.


I know mmqgis can generate grids, but these grids are plain flat grids, not geodesic ones, and they do not map to a sphere without extreme distortion, which I'm trying to avoid.


What I'm trying to make is something like this:


enter image description here


Ideally, this would be done on windows, but Linux is also an option if there are no tools available for the former



Answer



The dggridR R package "builds discrete global grids which partition the surface of the Earth into hexagonal, triangular, or diamond cells, all of which have the same size."




Richard Barnes (2017). dggridR: Discrete Global Grids for R. R package version 0.1.12. https://github.com/r-barnes/dggridR/



Using R in QGIS is still a pending skill, but here a tutorial: http://amsantac.co/blog/en/2015/10/31/qgis-r.html


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