Satellite time-lapse shows changes on the ground

Posted to Maps  |  Tags: ,  |  Nathan Yau

Since the 1970s, NASA has used satellites to take pictures of the Earth’s surface. This is an ongoing process, so when you string together the photos and play them out like a flip book, you see dramatic changes where cities boom, bodies of water dry up, and forests disappear. This is the motivation behind Earthshots, available for viewing via USGS.

The Landsat series of Earth-observing satellites has acquired data for monitoring the planet’s landmasses since 1972. The vast archive containing millions of Landsat scenes is managed at the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center in Sioux Falls, SD. The images displayed in Earthshots are examples of Landsat data that help scientists worldwide understand more about how both people and nature are changing the landscape.

There are a lot of images to look at, highlighting activity such as urban grown, agriculture, and natural disasters. So worth a look.

However, the browser is dated and a bit hard to use as it is now. You have to download large-ish video files to see, so hopefully it gets an animated GIF update at some point. Or at least streaming video.

Vox provided a pretty nice and quick summary in video form:

Favorites

Best Data Visualization Projects of 2016

Here are my favorites for the year.

How You Will Die

So far we’ve seen when you will die and how other people tend to die. Now let’s put the two together to see how and when you will die, given your sex, race, and age.

Life expectancy changes

The data goes back to 1960 and up to the most current estimates for 2009. Each line represents a country.

Marrying Age

People get married at various ages, but there are definite trends that vary across demographic groups. What do these trends look like?