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John Snow’s map of the 1854 London cholera outbreak was revolutionary in that it clearly drew a visual connection between deaths and the locations of well pumps. It helped contribute to the idea that cholera was a water-borne disease and effectively marks the creation of the field of epidemiology. I’ll reimagine/remake this map to even more directly …
a year ago

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More from Adventures In Mapping

Make a cross stitch style map in ArcGIS Pro

Yes, yes, maps are spatial communication devices and we can obsess over precision and clarity. But it all depends on your map’s purpose. Maps are also designed objects so they can carry within them the power of sentiment. Memory, joy, nostalgia. Or just plain old wonder and curiosity. Here’s how you can create a charming …

a month ago 19 votes
van Gogh style wind map

Here’s how to use compositing to tint flowing wind patterns by underlying terrain colors. Why? Because rather than a basemap providing some context around a layer that inherently blocks your view of it, you can leverage the amazing compositing blend modes of the ArcGIS Online Map Viewer to make the phenomenon reveal context rather than …

2 months ago 19 votes
Hack some bokeh into your ArcGIS Online map

You know how you can crank up the sense of drama and studio photography professionalism by switching over to portrait mode on your phone’s camera? It just looks…cool. The subject is in focus and the peripheral background content is blurry. It’s actually how our eyes and brains work, so it’s pleasing to see in photography. …

3 months ago 41 votes
Inner Glow Effect for Polygons in ArcGIS Online

Sure, there’s a glorious drop shadow effect in the ever-more-capable ArcGIS Online Map Viewer to give features a sweet glow, BUT there’s no inner glow effect. How do we cast that beautiful glow inward? I’ll admit that I’ve been stumped by this one for longer than I care to admit, but then it just hit …

3 months ago 45 votes
Make a seafloor map in the spirit of Marie Tharp & Heinrich Berann

Here’s how you can make a map inspired by the glorious collaboration of geologist Marie Tharp and landscape painter Heinrich Berann. We’ll use ArcGIS Pro (injected with a special terrain toolbox provided by cartographer, author, and public figure Ken Field), its amazing raster functions and blend modes, and luscious bathymetry data from GEBCO. Let’s dive in! 0:00 a brief …

4 months ago 41 votes

More in cartography

Ontario, Day 7 (Toronto Orientation)

We left the southern shores of Georgian Bay and I already missed the area. It turned out great even if I knew next to nothing about it before I researched the trip. However, all things come to an end and now I had a better-known part of Ontario to explore. I hadn’t spent any time […] The post Ontario, Day 7 (Toronto Orientation) appeared first on Twelve Mile Circle - An Appreciation of Unusual Places.

8 hours ago 1 votes
How Big is it Really?
2 days ago 3 votes
Submission – Official Map: Valley Metro Light Rail and Streetcar, Phoenix, Arizona, 2025

Submitted by a few people—sorry for the delay in getting to this!—including Shameek, who says: Phoenix is opening the new southern light rail extension and splitting the system into two separate lines, so naturally they released a new map! I like some of the ideas in here, especially the downtown inset and treating the streetcar […]

3 days ago 6 votes
The Daily MapGame Challenge
3 days ago 3 votes