| Abstract: | The National Hydrography Dataset (NHD) is the surface-water component of The National Map. The NHD is a comprehensive set of digital spatial data that represents the surface water of the United States using common features such as lakes, ponds, streams, rivers, canals, streamgages, and dams. Polygons are used to represent area features such as lakes, ponds, and rivers; lines are used to represent linear features such as streams and smaller rivers; and points are used to represent point features such as streamgages and dams. Lines also are used to show the water flow through area features such as the flow of water through a lake. The combination of lines is used to create a network of water and transported material flow to allow users of the data to trace movement in downstream and upstream directions. |
| Genre: | USGS Numbered Series |
| ProdID: | 97674 |
| Citation Author: | Simley, Jeffrey D.; Carswell, William J., Jr. |
| Citation Contributing Office: | National Geospatial Technical Operations Center |
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| Citation Language: | ENGLISH |
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| Citation Month: | Jul |
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| Citation Phsyical Description: | 4 p. |
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| Citation Publisher: | U.S. Geological Survey |
| Citation Series: | Fact Sheet |
| Citation Series Code: | FS |
| Citation Series Number: | 2009-3054 |
| Citation Search Results Text: | The National Map - Hydrography; 2009; FS; 2009-3054; Simley, Jeffrey D.; Carswell, William J., Jr. |
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| Citation Year: | 2009 |
| Type: | citation/reference |
| Text: | The National Map - Hydrography; 2009; FS; 2009-3054; Simley, Jeffrey D.; Carswell, William J., Jr. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/fs_2009_3054.jpg |
| URL (INDEX PAGE): | http://pubs.usgs.gov/fs/2009/3054/ |
| Date Other: | Tue, 14 Jul 2009 00:00 -0500 |
| Publisher: | U.S. Geological Survey |
| Superseded by: |
http://pubs.er.usgs.gov/publication/fs06002
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