“It’s one of those truisms that we know the shape of the surface of Mars and the Moon far better than we know our own planet.
The reason for this is Earth’s oceans: they cover 71% of the globe and are impenetrable to the satellite mapping techniques we use so capably on those other worlds.
The scientific community has set itself the ambitious goal of correcting this anomaly.
The aim is to have no feature on the ocean floor larger than 100m unmapped by 2030.
It’s a huge task when you consider at the moment the vast majority of the water-covered parts of Earth are known to a resolution no better than about a kilometre.
Some big technological shifts will be required in the next 10 years to correct the picture. And that is really the raison d’être behind the Shell Ocean Discovery XPRIZE.”