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Land surface characteristics
Features and attributes of earth's land surface.
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Landsat: A Global Land-Imaging Project [More info]
A visible, long-term record of natural and human-induced changes on the global landscape since 1972.
PDF Monitoring floods and fires during the summer of 2011--The value of the Landsat satellite 40-year archives [More info]
Examples showing the use of historical satellite imagery for assessing the extent and severity of landscape hazards such as fires and floods.
National land cover characterization [More info]
Homepage for the National Land Cover Data (NLCD), a land cover classification scheme, for the United States based on data derived from Landsat Thematic Mapper satellite data. Includes links to description, products, accuracy, and program partners.
PDF Advanced Remote Sensing Research [More info]
New and experimental methods of analyzing geospatial imagery, including detailed spectral analysis of land surface materials, historical image analysis, and long wave infrared image analysis.
PDF Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) Overview [More info]
General characteristics and spatial resolution of imagery products available from this type of sensor.
Assessing the impacts of climate variability and change on the Nation's resources [More info]
Site for a USGS project under the U.S. Global Change Research Program for a national assessment of the impacts of climate variability and change on resources with links to impacts in Alaska, western U.S., public lands, and water resources.
PDF Candidate cave entrances on Mars [More info]
Newly discovered candidate cave entrances into Martian near-surface lava tubes, volcano-tectonic fracture systems, and pit craters and describes their characteristics and exploration possibilities.
PDF Declassified Intelligence Satellite Photographs [More info]
Over 990,000 photos taken from 1959 through 1980 are available for use in studying land surface change. Especially useful because these were taken before Landsat was launched.
Digital Orthophoto Quadrangles (DOQs) [More info]
Description of what Digital Orthophoto Quadrangles are and how to obtain them plus information on the DOQ program, points of contact, DOQ status graphic, examples of DOQs, and free data viewer software.
PDF Drought Monitoring with VegDRI [More info]
The Vegetation Drought Response Index is a drought monitoring and mapping tool integrating satellite observations of vegetation and climate with land cover, soil characteristics, and other environmental factors.
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