Sounding Datum Line

A line representing the bathymetric contour of mean low low water (MLLW) for which a foreshore feature is present or visible. The NHD acquires Sounding Datum Line data from the National Ocean and Atmospheric Agency (NOAA) and it is not a product of the USGS. Not a named feature.  




feature type only: no attributes


Positional Accuracy|approximate


Positional Accuracy|definite


Feature Template