Spectral Library of Typical Ground Objects of Southern Hilly Region.

The associated data files include GNSS point coordinate data files for sampling points, photo data files corresponding to sampling points, and text description data files for sampling environment and terrain status. The spectral data was acquired using a Leisen IspecFleld-NIR spectrometer.To establish a typical terrain spectral library in Hunan Province, approximately 200 typical terrain categories were determined based on the classification standards of the third national land survey and the actual conditions of the province.

Five points were sampled for each category of typical terrain, with a focus on sampling typical terrain categories within the province and attempting to sample such categories uniformly throughout the province.