30 Days.
30 Charts.
1 Dataset.

The 2025 #30DayChartChallenge is done

Blog post coming soon!

It's the last day of the #30DayChartChallenge, and the final prompt is "National Geographic Theme" so here's my first and only map created for the challenge!

Made with #RStats
Colours inspired by National Geographic logo
{ggpattern} to use striped areas for missing data

The Parkes Observatory is national heritage listed in Australia. Apparently "Australia was an international leader in the ground-breaking field of radio astronomy research in the post-World War II period".

It may have even helped CSIRO invent wifi!

Another #Quarto + #RStats + Observable combination for Day 27 of the #30DayChartChallenge

Two heatmaps to illustrate the prompt of "Noise" - unsorted heatmaps look like random noise, (sensibly) sorted heatmaps are more likely to reveal patterns!

I'm delighted to learn that the Queensland government measures the height and direction of waves along the coast.

They use it for things like planning construction, investigating erosion, emergency services during cyclone season, global wave monitoring and so on.

You can use it to plan surfing, fishing, and the like!

https://www.qld.gov.au/waves

I've seen a common tree snake chase a lizard, whip snakes mating, and pythons fighting. I've also seen 3 legless lizards.

Down under, you can use the Southern Cross to tell time and direction.

Aboriginal Australians are among the world's first astronomers. The southern cross forms part of the Emu in the Sky, a dark constellation, which has featured in storytelling for thousands of years.

A trio of plots for day 12, 13, and 14 of the #30DayChartChallenge - for the prompts of Data.gov data, clusters, and kinship!

All made with the same #RStats theme to save time
Making use of highlighting and annotations
Different layouts using facets

#Day12 #Day13 #Day 14 #DataViz #ggplot2

For Day 20 of the #30DayChartChallenge and the prompt of "Urbanization", I used #Python to make a very abstract plot in the style of a city skyline silhouette!

(Still using the income inequality data via Our World in Data)

Catching up on Day 16 of the #30DayChartChallenge with the prompt of "Negative"!

Waterfall chart made in #RStats
Doesn't feel as intuitive when decreases are a positive outcome
Needed a few hacky approaches to get the right layout

When I decided to visualise the same dataset on income inequality for all 30 prompts of the #30DayChartChallenge, I wasn't sure how I'd manage to make the prompt of "Birds" fit with that data... But I managed to shoehorn some data about birds in there!

The result? A "correlation is not causation" / "dual axes are bad" plot in the style of Spurious Correlations made with #RStats!

For day 1 of #30DayChartChallenge, I made a quick waffle chart in #rstats from open data about automobile crashes in Delaware. As a #BikeTooter who commutes to work by #bike, I'm keenly interested in road safety.

Code: https://github.com/bardolater/30DayChartChallenge/blob/main/2025/01_Fractions.r

The meaning of "mateship" can be positive or a bit spicy and has changed over time. Have a read of the Wikipedia page: https://en.wikipedia.org/wiki/Mateship

As an aside, I enjoyed the section on "mate":

"In Australia, a 'mate' is more than just a friend and is a term that implies a sense of shared experience, mutual respect and unconditional assistance.

"The term includes use in ways other than friendship like getting someone's attention, replacing a name, questioning a statement, letting one know to calm down and referring to someone in a rash or harsh way."

Mate.

Did you know word order in Auslan (Australian Sign Language) is not the same as in English? It's a whole different "natural language"!

Apparently many Australian Aboriginal cultures have also had manually coded language, as signed counterparts of their oral languages!

Indigenous sign language is not only used by people with hearing loss. Many Indigenous languages are multi-modal!

There's the Warlpiri language, spoken by about 3,000 of the Warlpiri people in the Northern Territory, and there's Warlpiri Sign Language AKA Rdaka-rdaka ("hand signs") with about 1,500 signs.

And did you know there are one-handed and two-handed fingerspelling alphabets used in different English-speaking countries?

Auslan is a visual language using hand shape, orientation, location, movement, and expression! There's about 38 major hand shapes and 25ish variants.

I thoroughly enjoyed learning more about Auslan today.

2025 #30DayChartChallenge | day 05 | comparison | ranking
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: https://stevenponce.netlify.app/data_visualizations/30DayChartChallenge/2025/30dcc_2025_05.html
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#rstats | #r4ds | #dataviz | #ggplot2

It's Day 4 of the #30DayChartChallenge, and the prompt is "Big or Small"

Made a very minimalist chart using #RStats
I'm now determined to use this same dataset for all 30 prompts