Landsat 8 data (30 m pixels, and 15 m pan band):
Sources for Hydrographic Soundings
Get reasonable number of points, by either
Max/mean/min grids from point data Thin the soundings which are probably much denser than the 30 m Landsat spacing, and to get a grid to view them. You must see if the Max, Min, and Mean grids are different (perhaps by doing a difference operation with Multiple grid arithmetic Difference between two grids) and then decide which to use. You can then File, Save DEM, Save DBF table.
New image to open satellite image.
Database with soundings options
last revision 3/6/2017