LIDAR (light detection and ranging) is raising the bar. The technique uses laser pulses to construct super-precise 3-D images. It’s similar to radar, constantly sending out and receiving signals, but LIDAR can map nearly anything. It’s increasing the accuracy of aerial maps tremendously; indeed, the U.S. Geological Survey is currently working to remap every state with LIDAR.
It’s even been used to make music videos—watch Radiohead’s “House of Cards."