Surveyors of the Earth

"A journey into science, to discover land surveying, an essential field for the knowledge of our environment, nowadays devoted to technology."

If, at first, human being used stars to find its bearings, mankind can nowadays count on science to measure the Earth at a millimetric scale. Because land surveying of our planet is still in full swing. Satellites, cameras or drones : technology progress allows the scientists to explore it all. They can measure oceans, volcanoes, or even the atmosphere. But scientists are walking a tightrope, torned between their desire to gather more and more informations, and a population concerned about personal data's protection. This documentary shows a glimpse of actual scientifical research, and interrogate numerous scientists about the interest of land surveying in their specific field of research.