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CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA > MARYLAND
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This is test geospatial data for which we have complete control. The initial data contains the GPS coordinates for trees on the north side of the employee parking lot at the National Agricultural Library. There are also photos of the trees with embedded (EXIF) gps coordinates and azimuths. Eventually, there will be some additional information about the trees, probably species and size. There is potential for adding additional trees in the future. There is also potential for adding photos of the trees at various seasons to create time series data.
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Data measures precipitation, mercury, ammonia, and other atmospheric variables.
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Data measures precipitation, mercury, ammonia, and other atmospheric variables from the Beltsville NADP location.
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CASTNET measures ambient concentrations of sulfur and nitrogen species as well as rural ozone concentrations. The network includes 90 sites located throughout the US and Canada. Each site measures weekly concentrations of acidic pollutants, base cations and Cl- using a 3-stage filter pack with a controlled flow rate. Most CASTNET sites also include a temperature controlled shelter and continuous ozone monitoring system.