I am Dutch, born in 1955 and live in Leiden. Wikipedian since 2002.
I worked for the Wikimedia Foundation as Data Analyst from 2008 till 2019.

My blog about Wikimedia stats, Wikimedia projects, LinkedIn profile, Twitter account and art academy projects.

Visualizations: Wikipedia Growth Animated, Wikipedia Edits On A Random Day, Wikipedia Views Visualized.

After my retirement in 2019, I shifted my primary focus to OpenStreetmap. I also started a new project that maps trees in an urban environment. We use data from Wikipedia (and link to its articles), use images from Wikimedia Commons, use maps from Openstreetmap, and open data from the government: tree inventories. The project is called OpenBomenKaart.org.

Until my retirement in 2019 my work sometimes involved interacting with the Wikimedia community or using Wikimedia wikis for documentation. However, unless otherwise stated, any edit to Wikimedia projects by myself was a reversible act of a regular member of the community, not a legal or official action.

 
 

Soezo is one of my cats of the deceased kind.

Assignment while at art college:
"Make an impossible picture, no digital processing allowed."

Yet no animal was hurt during the photo-shoot.

The Graphic Designer's Barnstar For making timelines on Wikipedia infinitely more accessible and easy to use. --IvanP 20:25, 23 January 2006	The Original Barnstar For producing the best wikipedia for offline use. Jens Nielsen 14:41, 27 May 2007
The da Vinci Barnstar For developing comprehensive statistics used by wikis worldwide. GreenReaper (talk) 18:48, 10 November 2008	The Special Barnstar Thank you for Wikipedia Statistics WonYong 07:36, 7 November 2007

More photographs at Commons.