Dot Density Map

Dots are placed randomly within regions to show the density of populations. The dots and spacing allow for multiple groups to be shown at once.

Tutorials and Guides


If We All Left to “Go Back Where We Came From”

Imagine that those with immigrants in their family tree left the country. Almost everyone, basically.

Mapping a diverse but segregated America

Aaron Williams and Armand Emamdjomeh for The Washington Post delve into diversity and…

Immigrant America

A dot density map showing one dot for every 20 immigrants.

High-detail maps with Disser

Open data consultancy Conveyal released Disser, a command-line tool to disaggregate geographic data…

Racial dot map

Dustin Cable, a demographer at the University of Virginia’s Weldon Cooper Center for…

Map of every person counted in 2010 US Census

In the 2010 United States Census, 308,745,538 were counted, and Brandon Martin-Anderson from…

Mapping demographics of every block and city in America

Government data technology has felt behind the times the past few years with…

Race and ethnicity mapped by block

Instead of breaking up demographics by defined boundaries, Bill Rankin uses dots to…