Cédric Vidonne
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cvidonne.bsky.social
Cédric Vidonne
@cvidonne.bsky.social
3.5K followers 370 following 61 posts
Information Management Officer at UNHCR specialized in #DataViz and #maps. Love #rstats stuff, especially making charts with #ggplot2.
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cvidonne.bsky.social
Couldn’t resist doing the same for countries of asylum.

Turns out the picture is way more stable, with a few ups and downs.
Bump chart faceted by world regions showing the top countries of asylum for refugees, asylum-seekers, and others in need of international protection. Overall patterns are stable, with some short-term ups and downs across regions.
September 10, 2025 at 7:57 AM
cvidonne.bsky.social
Inspired by @nrennie.bsky.social excellent #TidyTuesday plot on the power of passports, I adapted the idea to look at refugee origins.

This chart ranks countries of origin of refugees, asylum-seekers, and others in need of international protection, grouped by region.

#RStats #ggplot2 #Refugees
Bump chart faceted by world regions showing the top countries of origin of refugees, asylum-seekers, and others in need of international protection. Asia and Africa rank consistently high, driven by long-term crises such as Afghanistan and Sudan. The Americas and Europe also appear high due to more recent crises in Venezuela and Ukraine.
September 10, 2025 at 7:14 AM
cvidonne.bsky.social
The Learning Divide

Our latest data story explores the stark educational challenges facing refugees in Mauritania and Mexico.

Explore the full story: dataviz.unhcr.org/product-gall...

#refugees #education #unhcr #dataviz
Mona Chalabi illustration for the UNHCR 2024 education report showing a pile of books that refugees children are climbing while learning and playing.
April 5, 2025 at 8:11 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge 2024 completed!

I’m proud to share a visual summary of all 30 maps I created this year! Nearly all maps were crafted in #rstats, showcasing themes from my work with @unhcr.org and some focused on Switzerland.

Full collection: shorturl.at/fgRlS

#maps #gis #dataviz
A collage featuring 30 vignettes, each representing a map created for the #30DayMapChallenge 2024. The title "30DayMapChallenge 2024 Roundup - Cedric Vidonne" appears prominently at the top. Each map showcases diverse themes and techniques, ranging from global humanitarian data and Swiss geography to creative experiments in cartography.
December 13, 2024 at 12:43 PM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 30: Final Map!
Wrapping up the challenge with a tribute to Swiss cartographer Eduard Imhof’s iconic style created entirely in #rstats!

A big thanks to John Nelson for his inspiring guidance on recreating Imhof's style and @drxeo.eu for making hillshade creation a breeze.
A map of Switzerland inspired by Eduard Imhof's cartographic style, created entirely in R. The map features colorful elevation gradients, detailed hillshading, and the main water bodies, including lakes and rivers. The design emphasizes Swiss terrain with a blend of aesthetic precision and technical expertise, following John Nelson's guidance for recreating Imhof's iconic style.
November 30, 2024 at 9:22 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 29: Overture Data

A minimalist take on Geneva's building footprint, highlighting how natural features like the lake capture attention.

Code: shorturl.at/l6cvQ

#maps #GIS #rstats
A simple and stylish map of Geneva, Switzerland, showing building footprints filled with varying shades to represent building height. The map has no legend, focusing on aesthetics to highlight the city's architectural patterns. The title reads "Geneva Building Footprint."
November 29, 2024 at 9:07 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 28: The Blue Planet

A different take on today’s theme—mapping @unhcr.org global presence! This map highlights 649 UNHCR offices across 146 countries, each working tirelessly to support people forced to flee.

Code: shorturl.at/vMG9m

#maps #GIS #rstats #refugees
A world map displaying the locations of 649 UNHCR offices as blue points, representing their presence in 146 countries. The points are evenly distributed across continents, emphasizing the global reach of UNHCR’s support for people forced to flee.
November 28, 2024 at 8:14 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 27: Micromapping

Zooming in on the Mbera Refugee Camp in Mauritania, today’s map highlights essential infrastructure: health facilities, schools, and sanitation.

Code: shorturl.at/GpTx9

#maps #GIS #rstats
A detailed map of the Mbera Refugee Camp in Mauritania, showcasing essential infrastructure points: health facilities (red), schools (pink), and toilets/showers (blue). The map uses a sand-colored background to reflect the arid setting. An inset map highlights the location of Mbera Camp within Mauritania.
November 27, 2024 at 9:00 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 26: Map Projection

Today’s maps explore global sea surface temperatures in January and July 2024, using the Spilhaus projection. Big thanks to github.com/rtlemos/spil... for enabling this unique projection in R!

Code: shorturl.at/pKC2S

#maps #GIS #rstats
Two side-by-side maps using the Spilhaus projection, focusing on global sea surface temperatures. The left map shows temperatures for January 2024, and the right map shows July 2024. The projection centers the oceans, offering a unique perspective on seasonal temperature variation across Earth's waters. The gradient highlights warm and cold areas, showcasing the dynamic shifts between seasons.
November 26, 2024 at 7:14 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 25: Heat

This globe map, in orthographic projection, shows the temperature anomaly for the month of July 2024, highlighting the regions most impacted by the heat. Inspired by @drxeo.eu and @milos-makes-maps.bsky.social tutorials.

Code: shorturl.at/fuBqY

#maps #GIS #rstats
A globe map in orthographic projection displaying global temperature anomalies for July 2024 compared to the 1950–1980 average. Regions with significant heat anomalies are colored in shades of red, indicating higher deviations, with the highest anomaly of +4.4°C highlighted on the map. The visual focuses on global patterns of heat distribution.
November 25, 2024 at 10:27 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 24: Only circular shapes

Inspired by @bjnnowak.bsky.social work, today's map visualizes displacement across Africa in 2024. Each bubble is split to contrast those displaced within a country with those who have sought refuge there.

Code: shorturl.at/TZMkZ

#maps #rstats
A bubble map of African countries displaying displacement data for 2024. Each bubble is split into two halves: one representing internally displaced people (IDPs) and the other representing refugees hosted within the country. Bubble sizes vary by the total displacement numbers, illustrating the relative scale of each country's displacement challenges. Yellow indicates IDPs (on the left side of each bubble), and blue represents refugees (on the right).
November 24, 2024 at 9:18 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 23: Memory

Today’s map captures the places I’ve lived and the locations I’ve visited on mission throughout my UN career.

Code: shorturl.at/cVjvT

#maps #GIS #rstats
A world map showing locations tied to my UN career. Points are differentiated into two categories: places I lived for work and places I visited on mission. Each point is placed based on memory, reflecting the locations that have shaped my humanitarian journey.
November 23, 2024 at 8:08 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 22: Two Colors

Today’s map is a tribute to simplicity (or laziness) and symbolism—a representation of Switzerland using just red and white, reflecting the iconic Swiss flag.

Code: shorturl.at/UVEVE

#maps #GIS #rstats
A simple map of Switzerland designed with only two colors: red for the country’s shape and a white cross in the center, mirroring the Swiss national flag. A minimalist yet striking visualization celebrating Switzerland’s identity.
November 22, 2024 at 8:30 AM
cvidonne.bsky.social
Just in time for the #30DayMapChallenge, I received two stunning beauties: Mappemondes and Le Blanc des Cartes, both featuring the incredible work of @xemartinlaborde.bsky.social Their creativity and design are on another level—makes me feel like I'm barely scribbling in comparison.
Two books on top of each other on a shelf. One being Le Blanc des Cartes and the other Mappemondes by Xemartin Laborde
November 21, 2024 at 8:26 PM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 21: Conflict

Today’s map visualizes the intensity of conflict in Ukraine, where more than 2,240 events were reported in just the first 15 days of November 2024.

Code: shorturl.at/wLIBR

#maps #GIS #rstats
A map of conflict events in Ukraine from November 1 to 15, 2024, based on ACLED data. The map uses points to illustrate over 2,240 events across the country during this short period. The visualization emphasizes areas with the highest concentration of conflict activities.
November 21, 2024 at 10:33 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 20: OpenStreetMap

Today’s map highlights the city of Bern, Switzerland, crafted using OpenStreetMap data.

Code: shorturl.at/DkKlw

#maps #OSM #GIS #rstats
A detailed map of Bern, Switzerland, created using OpenStreetMap data. The map highlights the city's distinctive layout, including its historic old town, the Aare River, and surrounding green areas, showcasing the intricate details and unique features of Switzerland’s capital.
November 20, 2024 at 10:30 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 19: Typography

Combining typography and Swiss history: Münchenstein, birthplace of the iconic Helvetica font in 1957, and Rütli Meadow, where the Swiss Confederation was founded in 1291.

Code: shorturl.at/9k6hT

#maps #GIS #rstats
A stylized map of Switzerland titled "HELVETI[c]A," with the subtitle "Swiss Design, Swiss History." The map highlights two locations: Münchenstein, labeled "Münchenstein – Birthplace of the Font Helvetica, 1957," and Rütli Meadow, labeled "Rütli Meadow – Birthplace of Confoederatio Helvetica, 1291." Helvetica font is used throughout, with selective bold and italic styles to emphasize place names and dates. The design nods to Swiss national colors, with a clean, minimalist style inspired by Swiss design principles.
November 19, 2024 at 8:47 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 18: 3D!

My first attempt at a 3D map: forest cover in Switzerland! 🌲
Turns out, 3D is tricky, but it’s been a great learning experience. Big thanks to @milos-makes-maps.bsky.social for the tutorials—they were a huge help!

Code: shorturl.at/FO3dw

#maps #GIS #rstats
A 3D map of forest cover in Switzerland, showcasing elevation with forested areas highlighted in shades of green. The map emphasizes the mountainous terrain and dense forest cover in the Swiss Alps, providing a striking visual effect. Created as a first attempt at 3D mapping for the #30DayMapChallenge.
November 18, 2024 at 10:45 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 17: Collaborative Map!

Today’s map was a family creation! Using LEGO bricks, my kids and I built a map of Switzerland highlighting its four distinct language regions: German, French, Italian, and Romansh.

#maps #LEGO
A map of Switzerland made entirely from LEGO bricks, color-coded to represent the four language regions: German, French, Italian, and Romansh.
November 17, 2024 at 9:28 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 16: Choropleth!

This bivariate choropleth highlights the complex flows of forced migration around the world, providing a view into both the origins and destinations of displaced communities.

Code: shorturl.at/rLbbg

#maps #GIS #rstats
A bivariate choropleth map illustrating global displacement patterns, showing countries with high numbers of people displaced as both origin and destination. The map’s shading highlights where "More displaced from" and "More displaced to" intersect along the color gradient, revealing regional trends in cross-border displacement.
November 16, 2024 at 8:46 AM
cvidonne.bsky.social
🏊🚴🏃 #30DayMapChallenge Day 15: My Data!

Today’s map dives into a personal milestone—my Ironman Copenhagen 2021 journey!

Code: shorturl.at/RSvqz

#maps #GIS #rstats
A map of the Ironman Copenhagen 2021 course, displaying the swim, bike, and run segments in one combined view. Each section is labeled with its respective discipline.
November 15, 2024 at 9:13 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 14: World

Today’s map explores the global availability of Common Operational Datasets (CODs). CODs are essential for humanitarian response, providing reliable geographic data to support crisis preparedness and coordination.

Code: shorturl.at/IyKO0

#maps #GIS #rstats
Choropleth world map showing countries with available Common Operational Datasets (CODs) for administrative boundaries. Each country is shaded to indicate whether the COD is classified as standard or enhanced, illustrating the global distribution and availability of this essential geographic data for humanitarian operations.
November 14, 2024 at 9:21 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 13: New Tool!

Third take on population density in Switzerland, this time using Bertin.js to create a spike map! Impressed by the functionality of this library.

Code: shorturl.at/ZMuWx

#maps #GIS #bertinjs #quarto
A spike map of population density across Switzerland, created using the Bertin.js library on Observable. Taller spikes indicate higher population density areas, giving a three-dimensional impression of distribution across regions.
November 13, 2024 at 1:28 PM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 12: Time & Space!

Today, I’m exploring refugee arrival trends in EU countries over the past 30 years. This geofacetted line chart captures the evolution of arrivals, showing how patterns have shifted within the EU.

Code: shorturl.at/gWEwr

#maps #GIS #rstats
Geofacetted line chart displaying the trends of refugee arrivals in EU countries over the last 30 years. Each facet represents an EU country, with line charts showing fluctuations in refugee arrivals over time.
November 12, 2024 at 10:54 AM
cvidonne.bsky.social
🌍 #30DayMapChallenge Day 11: Arctic (or Almost!)

For today, I’m taking a detour from the Arctic to Switzerland’s own glaciers, comparing their extent in 1850 and 2016.

Code: shorturl.at/J25lc

#maps #GIS #rstats
Map comparing glacier extent in Switzerland in 1850 and 2016, showing significant reduction in glacier coverage over time due to climate change. The map highlights affected glacial regions and provides a visual representation of historical and recent glacier boundaries.
November 11, 2024 at 8:53 AM