> In some geographical information systems and Big Data spatial databases, a Hilbert curve based indexation can be used as an alternative to Z-order curve, like

> In some geographical information systems and Big Data spatial databases, a Hilbert curve based indexation can be used as an alternative to Z-order curve, like in the S2 Geometry library.[12] Interesting to note that this S2 library is by Eric Veach, the guy who basically invented modern Monte Carlo path tracing, besides AdSense and AdWords: https://en.wikipedia.org/wiki/Eric_Veach https://en.wikipedia.org/wiki/Eric_Veach