PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY PEGGY GREB / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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Ecological mapping research. Researchers comparing satellite maps of forested wetland areas to determine the relationships between low (blue) and higher (white) elevations on one map, and wet (red) and drier (white) spots on the other map. The maps were created with remote-sensing technologies: laser light (LiDAR, light detection and ranging); and radio waves (SAR, synthetic aperture radar). This research is being carried out by University of Maryland researchers for the Agricultural Research Service (ARS) of the US Department of Agriculture. The area examined was the watershed of the Choptank River, Maryland, USA (map in background).
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