WorldView-3 goes into the mid-infrared wavelength, allowing you to see very subtle geological differences on the sites at a 0.4-metre resolution.

'Satellite archaeology' refers to the use of NASA and commercial high resolution satellite datasets to map and discover past structures, cities, and geological features.

What we did is we used NASA topography data to map out the landscape, very subtle changes. We started to be able to see where the Nile used to flow.

What these satellites do is they record light radiation that's reflected off the surface of the Earth in different parts of the light spectrum. We use false color imaging to try to tease out these very subtle differences on the ground.

Think about what would happen if Indiana Jones and Google Earth had a love child. I use high-resolution and NASA satellites and look for subtle differences on the surface of the earth that locate buried ancient pyramids and towns and ancient tombs, which we then go and excavate.

We emphasise the features on satellite maps by adding colours to farmland, urban structures, archaeological sites, vegetation and water.