Landsat images offer clearer picture of changes in watershed over 22 year period; Chesapeake Bay

Chesapeake Bay Journal: Landsat images offer clearer picture of changes in watershed - January 2010: Images taken from satellites more than 400 miles above the Earth's surface are bringing land-cover changes throughout the Chesapeake Bay watershed into tighter focus.
The images, which capture tracts as small as 30 square meters, offer a surprising picture of some trends in land cover. For instance, they indicate that the rate of farm land loss has slowed, while the fastest rate of urban expansion in recent decades occurred between 1984 and 1992.
But the images also confirm the ongoing-and accelerating-loss of forest land in the watershed.