4 ms·
Astronomy used this for very long time. Most advanced is Healpix: http://healpix.sourceforge.net/ http://healpix.sourceforge.net/ I really like how fast it i
by jankotek 10y ago
Astronomy used this for very long time. Most advanced is Healpix: http://healpix.sourceforge.net/ http://healpix.sourceforge.net/
I really like how fast it is. For example irregular area size of Greenland at 1 meter accuracy only takes a few hundred MB. One can do joins and unions, on such areas on modest laptop.
Disclaimer: I send a few patches to this project.
- amitp 10y agoHEALpix is cool. It has the same connectivity issue as with all the solutions — some locations are a little different. With hexagons a few polygons are different (polygons); with HEALpix a few vertices are different (three quads instead of four). In games we can get away with not mapping everywhere whereas in astronomy we can't :-)