(Data West Research Agency definition: see GIS glossary.) A map that displays the spatial distribution of an attribute that relates to a single topic, theme, or subject of discourse. Usually, a ...

The modern concept of map "layers," from weather to traffic, rests upon centuries of experimentation in what makes an intuitive and informative graphic. Opening on Aug. 24 in the main exhibition ...

Atlas Obscura on Slate is a blog about the world’s hidden wonders. Like us on Facebook and Tumblr, or follow us on Twitter. Today, in search of a way through a constantly expanding morass of ...

Periodically during the last three years since Google Earth was released, some talented developer gets the Google Earth bug and develops a wave of cool stuff. Right now, the guy with the most momentum ...

The choropleth mapping technique, which uses "ranges" or "graduated color," is a type of thematic mapping that focuses usually on a single theme with data summarized by statistical or administrative ...

What happens when you map one dataset dozens of different ways? That’s the exercise in Kenneth Field’s new book, Thematic Mapping: 101 Inspiring Ways to Visualise Empirical Data, in which every map ...

"In the nineteenth century, Americans began to use maps in radically new ways. For the first time, medical men mapped diseases to understand and prevent epidemics, natural scientists mapped climate ...