Where to Get Data
Landsat data can be ordered from two USGS websites. The descriptions below
will help you decide which site is best for you. Additionally, USGS
offers certain decadal and scientific Landsat data collections free
of charge.
Landsat ETM+, TM, and MSS data are now available from
USGS for free!
- USGS GloVis: The Global Visualization
Viewer
- On GloVis, you can search for data by clicking on an interactive map
or by entering the geographic coordinates (latitude and longitude)
of the site you are searching for. After clicking on the map or entering
coordinates the GloVis view window will appear on your screen showing
you nine adjacent Landsat 7 browse images. This allows you to visually
locate the best Landsat image for your purposes. Use the menu at
the top of the view window to view data from difference sensors,
to change the browse image resolution, or to view map layers. You
can use the "Add" and "Order" buttons at the lower
left corner of the viewer to order data.
- USGS Earth Explorer
- The USGS Earth Explorer website allows you to custom tailor your search
parameters for Landsat data. After entering the website (you can
login as a guest or become a registered user), you can either
search for data by selecting a region on a map, by entering coordinates,
or by entering a place name. Additionally, you also have the option
to choose your data set (e.g. "Landsat
4-5 TM", "Landsat
7 ETM+", "Landsat Orthorectified ETM+") and then select parameters such
as acceptable cloud-cover percentages and the range of desired
acquisition dates.
- Free
Orthorectified Landsat Data
- The USGS now freely offers the Landsat Orthorectified data collection
which consists of a global set of high-quality, relatively cloud-free
orthorectified MSS, TM and ETM+ imagery from Landsats 1-5 and 7.
This dataset was selected and generated through NASA's Commercial
Remote Sensing Program, as part of a cooperative effort between
NASA and the commercial remote sensing community to provide users
with access to quality-screened, high-resolution satellite images
with global coverage over the Earth's land masses. Over 16,000
images are freely available.