Transcript

INSTRUCTOR

When I open the Google Earth application, slowly the Earth rotates into view. Now, you're most likely used to using Google Earth to look at land, but here we're going to use it to look at the ocean.

And the first thing I want you to do is to select the Search Box on the top left hand side and enter the coordinates 47, 34 degrees north and 7 degrees 34 west. Now, these are latitude and longitude coordinates. Now when I click Search, now the Earth rotates and it zooms into a particular area of the ocean.

Looking at the surface of the ocean, there are some things that we need to take notice of. The first is the bit in yellow is the data source. And the second bit is that when I put my mouse over the surface, you can see the latitude and longitude moving but also the elevation changing, as well. So the elevation is the water depth, and so what those numbers are showing us are the water depth at particular latitudes and particular longitudes.

Going back to my original view now, what I'm going to do is zoom out so you can see where the point is. Now I zoom out more and more and more, and in the bottom right hand corner, you can see the altitude above the ground.

And when I get to about 1000 kilometres, I'm going to stop. And you can see the coast of France come into view, Cornwall, Wales, and Ireland.

And different shades of blue in the ocean represent different water depths. Light blue is shallow, dark blue deep.