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Olivia Vane

@oliviafvane.bsky.social

3.9K followers 196 following 9 posts

Data visualisation design + code Interactive data journalist at The Economist oliviavane.co.uk

Olivia Vane @oliviafvane.bsky.social · 12/05/2025

Some #design notes: This map uses a more unusual projection, the Nicolosi globular projection, and a stipple effect around the coastline—both demonstrated in code by @torbenjansen.bsky.social Thanks Torben! Try them yourself: 🌐 observablehq.com/@toja/nicolo... ✨ observablehq.com/@toja/pen-an...

observablehq.com

Nicolosi globular projection

The Nicolosi globular projection is a map projection invented about the year 1,000 by the Iranian polymath al-Biruni. It normally appears as a "double hemispheric" presentation in world maps. In 1660,...

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Olivia Vane @oliviafvane.bsky.social · 12/05/2025

In Morocco the interplay between Ramadan, which moves with the lunar calendar, and daylight saving left the government changing clocks up to 4 times a year. Shifting daylight saving to avoid Ramadan helps Muslims observing the holy month, so they don’t have to delay breaking their fast.

A heatmap titled "Sunrise time in Morocco" shows the shift in sunrise times from 2007 to 2024 across each month (January to December). Colours range from light (earlier sunrise) to dark blue (later sunrise). Each row represents a different year, with daylight saving time and Ramadan periods marked.

From 2008 onwards, daylight saving is observed in morocco, but it's start and end dates move to avoid Ramadan. In 2018, Morocco moves to permanent daylight saving, except during Ramadan.

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Olivia Vane @oliviafvane.bsky.social · 12/05/2025

This map shows the hour of sunrise globally through the year. It reveals time zones following national and, sometimes, regional boundaries, and slicing through the oceans.

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