#gis #spatial #mapping #satellitederivedbathymetry #sdb #nauticalcharting #machinelearning #ihostandards #gebco #seabed2030 #radiativetransferequation #rte #remotesensing #satellite #model #modeling #hydrography #hydrospatial #marine #charts #navigation #nautical #gischat #bathymetry #topobathy #automation #Esa