“Without Landsat, ‘we would be flying blind. We need those eyes in the sky to complement our ground efforts.'”


“Thanks to satellites and to science, we now know much more about Earth than we did on the first Earth Day fifty years ago.”


“Until recently the National Geospatial-Intelligence Agency has relied on very high spatial resolution imagery to assess environmental conditions that may pose threats to national security. This project has demonstrated the beneficial use of Landsat to assess water quality at a regional scale, which enables a broader understanding of changing environmental conditions.”


“The Landsat time series is so convenient and easy to use and has triggered science that was not possible a few decades ago.”


“There are more than 800 billion Landsat-derived pixels of land in our imagery. If we printed out just our Landsat-based world map at poster resolution, it would cover two acres.”


“There are roughly 400 billion land pixels in a single [Landsat] global mosaic.” (With at least one image of every location on Earth per season every year, the entire 43-year Landsat record contains more than 50 trillion pixels.)


“The majority of tropical countries are using Landsat imagery as the primary source of information to support their forest change assessments.”


“Landsat provides a very good coverage of Amazonia both spatially and temporally. We have known for some time already that the Landsat images can be used to identify ecologically relevant environmental and biotic variation in Amazonian rainforests, but this is the first time we use satellite images to actually predict species distributions.”


“The Landsat archive enables us to develop products that tackle problems and address issues at a continental scale. For a country the size of Australia, this would simply not be possible without free and open access to the full time-series that the Landsat archive provides.”


“This project would not have been possible without the consistent, long-term coverage provided by Landsat. The > 30-year archive of Landsat TM, ETM+, and OLI imagery enabled us to track changes in mangrove range limits on decadal scales.”


“The success of a mission, and the societal benefits it creates, relies on many factors, including design, manufacture, launch, and operation of the sensor. However, it also includes data acquisition, accessibility, availability, and continuity, all of which are embodied by the Landsat program.”


“If you don’t do the calibration right, you can’t do anything else.”


“Now that the entire Landsat archive is freely available it has become economically feasible to monitor disturbance over large areas using satellite time series.”


“The results of the Scopus bibliometric analysis indicate that inland water quality remote sensing has been growing dramatically since its introduction in the 1970s…The most pronounced year-on-year jump occurs right after 2008, which corresponds to the public release of freely available Landsat imagery by NASA and the US Geological Survey…This result is consistent with previous research showing that for multiple earth observation fields, the release of the Landsat archive resulted in more fr…


“From a valuation standpoint, Landsat is an extremely valuable public good just in its direct use—let alone the economic value of all the indirect uses built on the direct data.”


“This project would have been entirely impossible without the free and open-access data policy of the NASA/USGS Landsat-data archive.”


“Over the years, we’ve used the Landsat imagery to develop an incredibly accurate depiction of Earth and its changes over time, which we’ve published in Google Earth and Maps for use by billions of people worldwide.”


“The Landsat satellite series has proven to be a perfect match to the needs of modern irrigated agriculture and water resources management.”


“We use Landsat 8 to document glacier velocity patterns on a mountain-range-wide scale. Mapping glacier velocity is facilitated by Landsat’s high radiometric resolution and precise geolocation.”


“The Landsat satellites have also proved to be very useful, particularly for trying to do more detailed, finer-scale risk mapping.”


“Global Forest Watch’s ability to take advantage of Landsat imagery to produce a global forest monitoring platform highlights why remote sensing has become such a revolutionary technology. The imagery has achieved a state-of-the-art quality—NASA’s Landsat data is delivered in 30x30meter squares and has been for the past 40 years. Beyond this, it has been made radically accessible. Since 2008, anyone has been able to view and download the data from the United States Geological Survey (USGS) websi…


“The Landsat archive holds great potential for studying the processes behind the Greenland Ice Sheet’s response to our changing climate over multi-decadal time scales. It is essential that this record be exploited over other areas of the Greenland Ice Sheet.”


“Landsat represents a public good, Earth-observation infrastructure that allows everyone to study their respective land resources and their change over time.”


“The water resources communities all through the United States, especially in the irrigated areas, are very appreciative that NASA put the thermal imager on Landsat 8 and that future Landsats are guaranteed to include a thermal imager.”


Landsat 9 bw
Landsat 9 bw
Landsat 9 bw

The NASA/USGS Landsat Program provides the longest continuous space-based record of Earth’s land in existence. Landsat data give us information essential for making informed decisions about Earth’s resources and environment.