*3.2. WorldView-3 Topobathymetry into Land-Sea Habitat Mapping*

The evaluation of the influence of the WorldView-3-derived topobathymetry followed the same procedure as in 3.1. The addition of the DSM to the BGR basic dataset increased the OA by 2.74% (Figure 7a). The addition of the DSM to the VIS combination augmented the basic OA by 5.44% (Figure 7b). The addition of the DSM to the optical dataset enhanced the basic OA by 9.15% (Figure 7c).

The addition of the DSM to the eight MIR spectral bands (individually added to the optical dataset) showed a high mean contribution of 9.55% (Figure 8), slightly better than the MIR bands with no DSM (Figure 6). Some variations still appeared: the MIR1, MIR8, and MIR7 contributed to the best gains of the basic OA (9.73%, 9.69%, and 9.60%, respectively); the MIR5 and MIR6 contributed to the mean boost of 9.53% and 9.51%; and the MIR4, MIR2 and MIR3 contributed to the least increases of 9.47%, 9.45% and 9.42%. Since the DSM-added optical contribution to the basic OA was 9.15%, all MIR bands continued to provide insights for improving LULC-SUSC mapping.
