The level of detail of the grid. Resolution n+1 is created by performing an aperture 3 subdivision on a resolution n grid. On the Icosahedron, resolution 0 has 12 pentagonal cells centred on the vertices. Resolution 1 has 32 cells, 12 pentagonal cells centred on the vertices, and 20 hexagonal cells centred on the faces. Increasing resolutions are created by performing an aperture 3 subdivision. The resolution and the aperture define the size of each hexagon.
Note that a PYXIS index of 5-2 actually refers to a cell of resolution 2. To determine the actual resolution of a PYXIS index, add one to the number of digits following the hyphen.
Some interesting resolutions, for reference:
See also the table of PYXIS Resolutions.