4 ms·
The critical advantage of h3 vs. s2 is that all neighbors are equidistant from the central cell. Also, the implementation of the projection means there is less
by kndjckt 7y ago
The critical advantage of h3 vs. s2 is that all neighbors are equidistant from the central cell. Also, the implementation of the projection means there is less distortion than s2.
I use this library every day and absolutely love it.
- dpflan 7y agoThanks for sharing. What do you use it for? Did you use S2 previously?
- stefco_ 7y agoThis is the same reason astronomers like HEALPix tiling for skymaps [0]. Equal areas-per-pixel (important for integrating over areas) with straightforward spherical harmonics calculations and hierarchical extensions that can store images at multiple resolutions by subdividing base cells (LIGO uses one such hierarchical strategy for our low-latency gravitational wave source direction estimates [1]). [0] https://healpix.sourceforge.io https://healpix.sourceforge.io [1] https://arxiv.org/abs/1508.03634 https://arxiv.org/abs/1508.03634