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Investigations of coastal change and coastal resources often require continuous elevation profiles from the seafloor to coastal terrestrial landscapes. Differences in elevation data collection in the terrestrial and marine environments result in separate elevation products that may not share a vertical datum. This data release contains the assimilation of multiple elevation products into a continuous digital elevation model at a resolution of 3-arcseconds (approximately 90 meters) from the terrestrial landscape to the seafloor for the contiguous U.S., focused on the coastal interface. All datasets were converted to a consistent horizontal datum, the North American Datum of 1983, but the native vertical datum for...
Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Alabama, CMGP, California, Canadian Hydrographic Service, Chesapeake Bay, All tags...
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This dataset contains watershed means of estimated percent impervious surfaces for three time periods: 1992, 2002, and 2012. Estimates are based on coefficients derived from comparing land use of the 2012 NAWQA Wall-to-wall Anthropogenic Land-use Trends (NWALT) product to the 2011 National Land Cover Database (NLCD) imperviousness, then applying those coefficients to previous years (1974-2002) of the NWALT dataset.
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Field spikes were prepared at 207 stream and river sites as part of the U.S. Geological Survey (USGS) National Water Quality Assessment (NAWQA) project between December, 2012, and September, 2015. At the field site, a depth-and width-integrated environmental sample was collected, and one subsample of the environmental sample was spiked with a known amount of a spike mixture. Both the spiked subsample ("spike sample") and another subsample ("environmental sample") of the original water sample were analyzed for pesticides at the USGS National Water Quality Laboratory (NWQL) by direct injection liquid chromatography with tandem mass spectrometry (LC-MS/MS), and were used to calculate the spike recovery of each analyte....


map background search result map search result map Percent impervious surface for selected Chesapeake Bay watersheds Elevation artifacts in digital bathymetric and topographic models for United States east (east_cdem_v1.tif) and west (west_cdem_v.tif) coasts (polygon shapefile, geographic, NAD83) USGS Topo Map Vector Data (Vector) 69274 Batavia South, New York 20191118 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 25531 Lewbeach, New York 20191118 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 76595 McKeever, New York 20191118 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 31648 New Berlin North, New York 20191119 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 34616 Peekamoose Mountain, New York 20191119 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 71420 Rock City, New York 20191119 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 76620 Sabattis, New York 20191118 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 39167 Sag Harbor, New York 20191119 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 76174 Sag Harbor OE S, New York 20191118 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 40391 Sears Pond, New York 20191119 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 76650 Spruce Lake Mountain, New York 20191118 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 42988 State Line, Massachusetts 20180724 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 45406 Tooley Pond, New York 20191119 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 71882 Trout Creek, New York 20191120 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 46359 Union Springs, New York 20191119 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 46620 Van Etten, New York 20191119 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47805 Wawayanda, New Jersey  20170223 for 7.5 x 7.5 minute  FileGDB 10.1 Percent impervious surface for selected Chesapeake Bay watersheds Elevation artifacts in digital bathymetric and topographic models for United States east (east_cdem_v1.tif) and west (west_cdem_v.tif) coasts (polygon shapefile, geographic, NAD83)