NHD Waterbodies represent represents bodies of water such as lakes and reservoirs. Wetlands are also represented. Water bodies such as rivers, bays, oceans, and miscellaneous features such as rapids and spillways are in a different data set.
The NHD was created to assist scientists in modeling hydrologic features and is also useful for cartographic mapping purposes. The geometric features that came from the USGS DLG files, combined with the flow direction, reach codes, and other attributes taken from the EPA RF3 file, make the NHD a powerful modeling tool.
2016-05-11
USGS, Florida Water Management Districts, Florida Department of Environmental Protection
Florida Department of Environmental Protection
hydrography, water, lakes, streams, rivers, estuaries
Florida
1:24,000
Estimated to meet 1:24,000 National Map Accuracy Standards (+/- 40 feet)
If the source for elevation is 7.5 minute topo map, estimated to be one half of a contour, or +/- 2.5 feet.
permanent_identifier
fdate
resolution
gnis_id = USGS Geographic Names Information System (GNIS) ID
gnis_name = USGS Geographic Names Information System (GNIS) Name
areasqkm
elevation = Feature elevation (Integer)
reachcode = Unique identifier composed of two parts. The first eight digits is the subbasin code as defined by FIPS 103. The next six digits are randomly assigned, sequential numbers that are unique within a subbasin, length 14.
ftype = 3-digit feature code. (Integer)
| Code | Description |
|---|---|
| 390 | Water |
| 436 | Reservoir |
| 466 | Wetland |
fcode = 5-digit feature code. Extra two digits provide a more detailed description of the feature. (Integer)