Nasa and Japan’s trade ministry have jointly published the most complete map of the Earth ever created. Covering 99% of the Earth’s surface the data is free to download and use. Elevation has been mapped with each point just 30 m apart. Previous high-resolution maps used points 80 m apart, which meant less accurate results over steep terrain. Nasa’s Woody Turner said: “This is the most complete, consistent global digital elevation data yet made available to the world.”
