DEM orientation based on local feature correspondence with global DEMs
Thanks to rational polynomial coefficients (RPCs), which are provided by vendors to end users, digital elevation models (DEMs) can be simply derived from satellite stereo images.However, DEMs are influenced by systematic errors in the rational function model (RFM), known as RPC biases.Global DEMs (GDEMs), such as the Shuttle Radar Monocrystalline P