Yes, for example, the datasets at this page: https://adsb.exposed/ https://adsb.exposed/ are indexed by the Morton curve: https://github.com/ClickHouse/adsb.exp

Yes, for example, the datasets at this page: https://adsb.exposed/ https://adsb.exposed/ are indexed by the Morton curve: https://github.com/ClickHouse/adsb.exposed/#database-and-queries https://github.com/ClickHouse/adsb.exposed/#database-and-que... and https://reversedns.space/ https://reversedns.space/ as well. Also, a trivial application is image compression. Let's say you have a PNG image. PNG uses zlib, so if instead you take a raw bitmap and compress it with ZSTD, it typically will be better, but if you also sort pixels by the Hilbert curve first and then compress with ZSTD, it will be typically even better.