In 1989 Karara stated “Although through-water depth determination from aerial photography isa much more time consuming and costly process, it is still a more efficient operation than ship-bornesounding methods in the shallower (less than 10 m deep, say) water areas. Moreover, a permanentrecord is obtained of other features in the coastal region such as tidal levels, coastal dunes, rockplatforms, beach erosion, and vegetation” [1], a statement that has held true until today, despite thefact that many alternatives for bathymetry [2] have arose since. This is especially the case for thecoastal zone of up to 6 m depth, which concentrates most of financial activities, is prone to accretionor erosion, and is ground for development, where there is no affordable and universal solution forseamless underwater and overwater mapping. Image-based techniques fail due to wave breakingeffects and water refraction, and echo sounding fails due to short distances.