Jun 24, 2009Landsat Looks at Land Use Trends Around Mobile Bay

Jun 24, 2009 • A recent NASA Technical Report from Stennis Space Center has used Landsat data to document land use changes in Alabama’s Mobile Bay watershed between 1972 and 2008. Over those 36 years, researchers found a 55 percent increase in urban areas. The urban expansion mainly occurred in regions which were formerly covered […]

Jul 10, 2008Diversity and Biomass of Tropical Forests Cleared for Land Development

Jul 10, 2008 • To learn more about the tropical forests that are cleared when urban and residential development spreads, scientists assembled the most comprehensive time series of land cover maps to date for the island of Puerto Rico.  They learned that most of the forests cleared for land development from 1991 to 2000, 55%, […]

Chesapeake Bay
Apr 22, 2008Landsat’s Role in Chesapeake Bay Management

Apr 22, 2008 • John Smith’s Bay Then & Now – When Captain John Smith first explored the Chesapeake Bay in 1607, the “Great Shellfish Bay,” as it was called by the Algonquian Natives, had transparent waters teeming with aquatic life, massive oyster reefs, tremendous waterfowl flocks, and uninterrupted virgin hardwood forests on its shores. […]

Karen Seto
Jul 4, 2007Landsat Links Urban Growth and Rainfall Pattern Change

Jul 4, 2007 • For the first time, scientists have used satellite images to demonstrate a link between rapid city growth and rainfall patterns, as well as to assess compliance with an international treaty to protect wetlands. The results have been published in two studies co-authored by Karen Seto, assistant professor of geological and environmental […]

Cities from Space
Feb 15, 2007Landsat Data Used to Understand Urban Environments

A new website featuring Landsat images of 77 international cities has been published by the Socioeconomic Data and Applications Center (SEDAC). By analyzing urban reflectance (both visible and infrared) and surface temperatures, SEDAC has established criteria to help distinguish urban land cover from other land cover types. These spatial characterizations of urban land cover extent […]