I used a Google image search (https://images.google.com/) to figure out that it's a map showing the average occurrence of flood during the year.

https://www.wired.co.uk/article/climate-change-floods

https://www.courthousenews.com/climate-change-wreaking-havoc-europes-flood-season/

Jason Glatz, Maps Specialist
University Libraries (2014 Waldo Library)
Western Michigan University
1903 W Michigan Ave
Kalamazoo MI 49008-5353 USA





From: Maps-L: Map Librarians, etc. <[log in to unmask]> On Behalf Of Kathy Stroud
Sent: Thursday, January 3, 2019 3:39 PM
To: [log in to unmask]
Subject: Trivia Question - What is this a map of???

I know I've seen this map before, but I don't recall what it represents.  Obviously I have something taken out of context.

https://tinyurl.com/y7qr8erk

Kathy Stroud
David and Nancy Petrone Map/GIS Librarian Knight Library
1299 University of Oregon
Eugene, OR 97403-1299
541-346-3051

"A map is not just a picture-it's also the data behind the map, the methodology used to collect and parse that data, the people doing that work, the choices made in terms of visualization and the software used to make them."