In my continued obsession with Tree Ring Symbols, I’ve taken the seasonal tornado Tree Ring map and sliced it up into frames. The tornado season is like a wave that forms in the gulf, crashes over middle America, then rolls back to the sea.
There are a million ways to show movement (here are some others, using the same data, and here’s how they were made). Chronology is inherent in Tree Ring symbols, but the addition of subsetting the months and stitching them into a sequence is especially fun.
And, if you’d like to give your brain a rest and just look at the fours seasons, here are those…
Here they are, all at once…
Happy Mapping! John
Adventures In Mapping 
I’m going to have to give this a try! Did you do any larger scale versions? If so, how did it go?
LikeLike
Cool! Now which one is Large Scale, a small map with big area or big map with small area, crap, I can’t ever remember which way the “scale” word goes!
LikeLiked by 1 person
This is so entretaininig and interesting! Congrats John greetings from Tulum, Mexico
LikeLike
Thanks!
LikeLike
This is amazing! Interesting that there is a sort of ring of intensity centered on southern Missouri in the spring, with a depression in the middle.
LikeLike
Thanks! It is an interesting visualization type for sure. I’m glad you are finding patterns revealed in it.
LikeLike
These are amazing John. This gives me an idea to use this methodology to show population migration. Where I am at, Fauquier County, VA, there is a theory that areas are developing around us at a greater rate than we are due to the county’s conservative stance on development. Do you think it would be possible to develop this same type of animation with tree rings or even fire fly hexagons to show population/migration in and around Fauquier County, VA over the course of 30 years? I think what we will see is a stick in the water effect. Imagine the county being the stick and population is the water flowing around it. My initial idea was to develop this as a dot density map, but I am not sure how to add the animation or even how to actually acquire the census data to support.
LikeLike
USA’s heart beat!
LikeLike
I love this. Preparing to teach my Cartography and Visualization course and I wonder if you’ve seen this approach used for fire mapping. I’m picturing fires by month and year. Since fire perimeters vary in size and shape, perhaps a hex-bin approach would work. Thoughts?
LikeLike
oh, that’s a great idea! you could follow this same process but with historic fire perimeters. if you do it i want to see how it comes out!
LikeLike