Worth a Click

Scenes From a Changing Planet - Smithsonian.com

Read More About: alaska, landsat, remote sensing

For 40 years Landsat satellites have been circling the Earth, taking pictures from roughly 440 miles above us. Each loop lasts about 99 minutes and it takes about 16 days to capture the entire planet. Which means that Landsats have been recording, in 16-day intervals, the ebb and flow of our relationship with the planet since the early 1970s.

http://blogs.smithsonianmag.com/ideas/2012/08/scenes-from-a-changing-planet/

Stay Connected

Subscribe to Directions Magazine's Newsletters

Recent Comments

Privacy and Personal Geographic Data

At the Creating the Policy and Legal Framework for a Location-enabled Society conference in Boston, Kirk Goldsberry, who is a Visiting Scholar at the Center for Geographic Analysis at Harvard, gave a fascinatng presentation with the help of two of his students on the topic of personal geographic data and privacy. Geoff Zeiss provides a recap.