“By analyzing 34 years of [Landsat] data, we estimated that about 56% of the rivers globally are affected by seasonal ice [and] that there is 2.5 percentage points decline of river ice globally during this time.”
“Even though I have a book coming out about the Moon Landing, I’ll say it: Landsat is likely the greatest, most impactful, yet under-appreciated, accomplishment of the entire space age.”
“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 frequent and larger-scale studies.”
“The opening of the Landsat archive in 2008 was pivotal… We now have the best available map of disturbances for the United States.”
“By combining the 34-year record provided by Landsat [30 m] with climate data, we can now quantify relations between water availability and vegetation dynamics in ways that were not previously possible.”
“The availability and accessibility of remotely sensed digital imagery obtained from Landsat satellites allow coastal scientist—and more importantly community members—the opportunity to map, evaluate and continuously monitor shoreline movement at regular intervals given the unprecedented pace of Arctic climate change.”
“Landsat makes it possible to compare images over almost 5 decades and makes the role of climate change unmistakable in this incredibly beautiful mountainous part of Alaska.”
“Landsat fit all our criteria, and best of all it was free and very easy to download and work with.”
“There is no satellite record that has the temporal reach of Landsat. While new satellite- and aircraft-based sensors are coming online with sub-meter resolution offering more and more spectral bands, none of them allow the types of temporal investigation that the combined generations of Landsat offer.”
“The long-term acquisition plan of the Landsat mission provides a unique and invaluable dataset for tracking multi-decadal changes in the density and distribution of mangroves at continental scales.”
“Landsat has been one of the only ways we can directly measure the global food supply.”
“During abnormal growing seasons or natural disasters, satellites shine. Landsat is a robust and independent way to validate what our statistics are telling us.”
“Landsat is the longest civil satellite data collection we have. The USGS opening the archive has created opportunities for instructors like us to integrate students.”
“The Landsat time series is so convenient and easy to use and has triggered science that was not possible a few decades ago.”
“Landsat’s thermal data is critical for tracking water use in the western United States, where rainfall can be short in supply and managing water resources is critical to ensuring a sustainable supply for farmers, cities, and natural ecosystems.”
“What should be done with the old bird?”
“[T]he case for open data is more than proven by Landsat and Copernicus. Many innovative applications using these datasets are the dividends that benefit the taxpayer.”
— Arup Dasgupta, Earth Observation Policies – What is the Way Forward, Geospatial World,
Aug 5, 2019
“The Landsat collection 1 datasets represent a milestone in remote sensing science, with comparatively stable radiometric calibration and atmospheric correction.”
“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.”
“I am a big fan of Landsat 8 satellite images as a resource when making maps.”
“The community was very vocal regarding the value of a free and open data policy.”
“You can see the changes of your orchard over time & over space, and by measuring the canopy temperature [with Landsat] you can see whether the canopy is in balance with the rest of the environment around the trees.”
“As a researcher with a limited budget, using the Landsat data for free made this project possible. The global geographic range together with free availability ensures that our study could potentially be repeated in other countries.”
“Our mapping techniques build on the historical Landsat record to provide highly needed information on regional scale and this helps in evaluating subtle changes in mangroves over a long period of time (trends) and to detect sudden changes due to natural catastrophes or dramatic anthropogenic impacts… [and] Thanks to the increased abundance of Landsat satellite images, it is becoming progressively easier to collect available images of mangrove habitats captured at low tide and high tide.”
“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) website free of charge, which has made satellite imagery a primary tool for forest and land cover monitoring. Without it, GFW would not be possible.”
“Landsat, now one of the largest and most powerful tranches of Earth-science data, is an invaluable scientific resource.”
“Without the free and open Landsat data policy, a lot of commercial applications wouldn’t be feasible and a lot of commercial companies—including GDA—would be very different than they are.”
“If you don’t do the calibration right, you can’t do anything else.”
“Landsat data is hugely important for society, science, and technology.”
“Landsat is an invaluable tool for people working in our field of community wildfire safety.”
“We started with all of the Landsat images from the beginning of the [30-meter resolution era of the] Landsat program, so we could go back to 1984 and show how the surface of the planet had changed. It shows the changes in cities, the birth of cities. It shows flooding. It shows things like deforestation. It shows the incredible expansion of agriculture. There’s just so many things you get from that data set.”
“During the decade following 1969, a singular development catapulted computer mapping: the launch of Landsat by NASA and the U.S. Department of the Interior in July 1972.”
— Joe Francica, Fifty Years of Commercial GIS – Part 1: 1969-1994, Directions Magazine,
Dec 31, 2018
“You need decades of data to say that a change in kelp is due to climate change rather than other cyclical factors, with Landsat, we have those data.”
“I saw more use of Landsat as the gold standard of calibration than I’ve ever seen in the past. Most of the commercial vendors I heard from called out Landsat as the gold standard. Even the European vendors called out Landsat, which I thought was unique.”
“Landsat pays dividends not only to the prosperity of the global economy, but also to people and planet.”
“Landsat is proof-positive of the value of Earth observation data, and particularly open access to Earth observation data.”
“We cannot replace Landsat with Copernicus. In fact the programs complement each other. The world has been benefitting from Landsat data for the past 40 years now. It is really a unique and extremely valuable data source that has provided knowledge and understanding of the planet.”
“I don’t think people appreciate just how revolutionary it was when the Landsat archive became available for free and really empowered researchers and advocates to have access to that data at an affordable price to be able to do the kind of mapping that’s now been done, making visible what was previously invisible…”
“By establishing baseline knowledge of Earth’s land areas throughout the last half-century, Landsat allows scientists to evaluate environmental change over time, to better understand the drivers and impacts of change, to model and predict future changes, and to chart these changes in the form of maps.”
“The Landsat program—the longest-standing continuous global record of the Earth’s surface through satellite imagery—has enabled… solutions in support of people, planet, and prosperity since its launch in the 1970s.”
“Landsat is a powerful example of the benefits of long-term investing to build robust data systems for sustained, longitudinal monitoring of environmental, social, and economic conditions.”
“The first year we made Landsat open, we put out 25,000 Landsat scenes. Today, we put out millions of scenes a year.”
“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.”
“…Landsat and Copernicus, the best two examples of government satellite programs that have positively impacted global development as result of their free and open data policy.”
“The Landsat program is one of the world’s greatest open data success stories. Landsat satellites have been orbiting the earth for decades, creating an irreplaceable archive for studying questions ranging from the retreat of the Aral Sea to water quality in Iowa.”
“That’s the beauty of Landsat—it allows us to quantify these spatial patterns that are of high interest to water managers.”
“Another landmark program within USGS is called Landsat… USGS made a decision…to be able to open up that data, make it free, and the scientific discoveries, the articles, the access, the utility of that data just went absolutely through the roof. So it’s been a really wonderful story about how opening up scientific data allows more discovery, gets people more excited… We really do try to put our data out there in a way that it is usable by the most amount of people as possible.”
“It is a game changer for people who want to know the impact of a management action on particular piece of land, or how a dam affected the downstream area.”
“The Landsat archive and other remote sensing systems provide the means to map and measure disturbance rates of the last 40 years.”
“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.”