Since January 1, 2000, more than 4.3 million scenes have been captured by Landsat satellites and made available to the public. Graph by Joshua Stevens, using data collected from the U.S. Geological Survey acquisitions archive.

Cloud Computing Used to Analyze Landsat Imagery and Detect Deforestation

Landsat, NASA’s longest running initiative for the acquisition of Earth imagery, has generated nearly 50 trillion pixels of data by capturing one image per season, of every place on Earth, for the past 43 years, providing a treasure trove of data for researchers.

Ecuador reforestation plots from Sistema Único de Información Ambiental.

Putting the Trees Back on the Map: How GIS is Helping Reforest South America

GIS is being used in creative ways – including covert spy tracking of illegal logging deep in the Amazon – to help put and keep trees back on South America’s map. The simplification of tools and availability of web systems has empowered technicians, NGOs, and governments alike to address corruption and illegal logging with transparent map-based monitoring.