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These vector contour lines are derived from the 3D Elevation Program using automated and semi-automated processes. They were created to support 1:24,000-scale CONUS and Hawaii, 1:25,000-scale Alaska, and 1:20,000-scale Puerto Rico / US Virgin Island topographic map products, but are also published in this GIS vector format. Contour intervals are assigned by 7.5-minute quadrangle, so this vector dataset is not visually seamless across quadrangle boundaries. The vector lines have elevation attributes (in feet above mean sea level on NAVD88), but this dataset does not carry line symbols or annotation.
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The dataset contains the analytical results for quality-control samples collected during the surface-water sampling for the Triangle Area Water Supply Monitoring Project. The data are equipment blanks, sampling-vehicle (ambient) blanks, and field blanks collected during October 2015 through September 2017. Several study sites contained in this dataset were sampled for other USGS projects during the same time frame. Unless the quality-control samples at these sites were collected in conjunction with the Triangle Area Water Supply Monitoring Project, the data for other projects are not included in the dataset.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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As part of the Triangle Area Water Supply Monitoring Project, the U.S. Geological Survey conducted a study to evaluate the occurrence and distribution of phytoplankton, taste-and-odor compounds, and cyanotoxin occurrence in four water-supply reservoirs in the Triangle area of North Carolina. This data release contains the associated data described in the Scientific Investigations Report, "Phytoplankton, Taste-and-Odor Compounds, and Cyanotoxin Occurrence in Drinking Water Supply Reservoirs in the Triangle Area of North Carolina". Surface-water samples were collected four times between April and October 2014 at five study sites for laboratory analysis of nutrients, chlorophyll a, major ions, metals, taste and odor...
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
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Layered geospatial PDF 7.5 Minute Quadrangle Map. Layers of geospatial data include orthoimagery, roads, grids, geographic names, elevation contours, hydrography, and other selected map features. This map is derived from GIS (geospatial information system) data. It represents a repackaging of GIS data in traditional map form, not creation of new information. The geospatial data in this map are from selected National Map data holdings and other government sources.
map background search result map search result map USGS Topo Map Vector Data (Vector) 28887 Merry Oaks NC (published 20221018) Shapefile USGS Topo Map Vector Data (Vector) 25624 Liberty NC (published 20221018) Shapefile USGS Topo Map Vector Data (Vector) 6393 Burroughs, Georgia 20200911 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 32750 Oak Level, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 36866 Raccoon Key, Georgia 20200914 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 76161 Raccoon Key OE S, Georgia 20200915 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 37845 Richmond Hill, Georgia 20200915 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47624 Wassaw Sound, Georgia 20200914 for 7.5 x 7.5 minute Shapefile Analytical results for blanks collected during surface-water sampling at the Triangle Area Supply Monitoring Project study sites, North Carolina, October 2015 through September 2017 USGS US Topo 7.5-minute map for Garden City, GA 2020 USGS US Topo 7.5-minute map for Tybee Island South, GA 2020 USGS US Topo 7.5-minute map for Wassaw Sound, GA 2020 USGS US Topo 7.5-minute map for Savannah, GA,SC 2020 Associated Data for the Phytoplankton, Taste-and-Odor Compounds, and Cyanotoxin Occurrence in Drinking Water Supply Reservoirs in the Triangle Area of North Carolina US Topo 7.5-minute map for New Hill, NC US Topo 7.5-minute map for Bynum, NC US Topo 7.5-minute map for Merry Oaks, NC USGS NED 1/3 arc-second Contours for Raleigh W, North Carolina 1 x 1 degree (published 20221017) GeoPackage USGS Topo Map Vector Data (Vector) 9555 Coleridge NC (published 20221018) GeoPackage USGS Topo Map Vector Data (Vector) 41328 Siler City NC (published 20221018) GeoPackage USGS Topo Map Vector Data (Vector) 28887 Merry Oaks NC (published 20221018) Shapefile USGS Topo Map Vector Data (Vector) 25624 Liberty NC (published 20221018) Shapefile USGS Topo Map Vector Data (Vector) 6393 Burroughs, Georgia 20200911 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 32750 Oak Level, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 36866 Raccoon Key, Georgia 20200914 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 76161 Raccoon Key OE S, Georgia 20200915 for 7.5 x 7.5 minute Shapefile USGS Topo Map Vector Data (Vector) 37845 Richmond Hill, Georgia 20200915 for 7.5 x 7.5 minute FileGDB 10.1 USGS Topo Map Vector Data (Vector) 47624 Wassaw Sound, Georgia 20200914 for 7.5 x 7.5 minute Shapefile USGS US Topo 7.5-minute map for Garden City, GA 2020 USGS US Topo 7.5-minute map for Tybee Island South, GA 2020 USGS US Topo 7.5-minute map for Wassaw Sound, GA 2020 USGS US Topo 7.5-minute map for Savannah, GA,SC 2020 US Topo 7.5-minute map for New Hill, NC US Topo 7.5-minute map for Bynum, NC US Topo 7.5-minute map for Merry Oaks, NC USGS Topo Map Vector Data (Vector) 9555 Coleridge NC (published 20221018) GeoPackage USGS Topo Map Vector Data (Vector) 41328 Siler City NC (published 20221018) GeoPackage Associated Data for the Phytoplankton, Taste-and-Odor Compounds, and Cyanotoxin Occurrence in Drinking Water Supply Reservoirs in the Triangle Area of North Carolina Analytical results for blanks collected during surface-water sampling at the Triangle Area Supply Monitoring Project study sites, North Carolina, October 2015 through September 2017 USGS NED 1/3 arc-second Contours for Raleigh W, North Carolina 1 x 1 degree (published 20221017) GeoPackage