Maps and GIS data depicting land use and land cover in areas near the upper Mississippi River. Historical data are available, dating from the 1890s, 1975, and more regularly from the late 1980s to 2000.
Grain-size analysis of marine sediments of the U.S. eastern coast with sampling and lab methods, surficial sediment database in three formats (Excel, Dbase IV, ASCII), and use of geographic mapping tools for visualizing sediment data layers.
Description of datasets of AVHRR data available from the EROS Data Center in Sioux Falls, SD in three formats: High Resolution Picture Transmission (HRPT), Local Area Coverage (LAC), and Global Area Coverage (GAC).
Technical information on the Aircraft Scanners data set at the USGS EROS Data Center containing digital imagery acquired from several multispectral scanners collected over conterminous United States, Alaska, and NASA aircraft.
Geospatial hydrologic and reference data covering the upper Mississippi River, provided in formats appropriate to geographic information systems (GIS) and used in long-term resource monitoring of the area.
Arsenic is a naturally occurring element in rocks, soils, and the waters in contact with them. It is found in ground water as the result of minerals dissolving from weathered rocks and soils. This site links to data, maps, and more.