[thredds] Data sources

[Carl Drews <drews@xxxxxxxx>]

Unidata -

The topo/bathymetry server at

http://coast-enviro.er.usgs.gov/thredds/ncss/grid/bathy/srtm30plus_v4.nc/dataset.html

is extremely useful!  What is the source of this data?  Somewhere I 
thought I read that you had combined Smith & Sandwell bathymetry with 
SRTM30 topography, but I can't find that reference again.

Carl