Practical guide for color correction of satellite images

Mar 28, 2016

Robert Simmon provides a hands-on guide to get true color from satellite imagery. The atmosphere makes it a little tricky:

The atmosphere scatters light from the sun before it hits the ground (or a cloud, but we don’t care about those at the moment), and then scatters reflected light again on its way back to a sensor. The atmosphere even scatters light back into a camera that didn’t hit anything on the ground at all.

That would be challenging enough, but the atmosphere changes from one place to another (the air above deserts is typically dry, while the air above a forest is usually moist (even when not cloudy) and often filled with tiny aerosol droplets), and over time (a hazy summer day compared to a crisp fall evening).

Favorites

Real Chart Rules to Follow

There are rules—usually for specific chart types meant to be read in a specific way—that you shouldn’t break. When they are, everyone loses. This is that small handful.

Pizza Place Geography

Most of the major pizza chains are within a 5-mile …

The Best Data Visualization Projects of 2014

It’s always tough to pick my favorite visualization projects. Nevertheless, I gave it a go.

Graphical perception – learn the fundamentals first

Before you dive into the advanced stuff – like just about everything in your life – you have to learn the fundamentals before you know when you can break the rules.