A Zoomable Equal-Area Map Projection that interpolates to Mercator

About A Zoomable Equal-Area Map Projection that interpolates to Mercator

Seamlessly transitioning to Mercator upon zoom

In the maker’s words

Converting that integer to a Year, Month and Day is a fundamental calculation made in almost all programming languages and standard libraries. It runs every time a date is displayed, whether it's in a user interface, log, API etc. While it is rarely a bottleneck, it is a very frequently run algorithm, and thus has attracted a lot of attention over the years. In 2021, Cassio Neri and Lorenz Schneider developed the Neri-Schneider algorithm, which was a major breakthrough in this niche area. Lately, I have been studying this function deeply, and found what I believe may be the last remaining substantial improvements achievable on current hardware. The gains come mainly from counting dates backwards, and from reducing the number of multiplications from 7 to 4. Adoption will depend on whether library maintainers consider the performance benefit to outweigh the readability. If this is rejected…

Where people found it

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