3D data refers to data that includes information on three spatial dimensions - length, width, and height. This type of data is often represented in a three-dimensional coordinate system and can be used to create lifelike visualizations, models, and simulations of real-world objects or environments. 3D data is commonly used in fields such as computer graphics, computer-aided design (CAD), medical imaging, virtual reality, and gaming. Researchers working with 3D data may develop algorithms, software, and tools for manipulating and analyzing three-dimensional information to further our understanding of complex systems and phenomena.