ランドサットTMデータによる海底地質を考慮した水深推測モデルの開発

抄録

Remotely sensed bathymetry in Kin Bay, Okinawa main-island, Japan was performed using digital data of a single band (band 2) of Landsat-5 Thematic Mapper (TM). Models were developed considering the bottom features of coral reef-bright sand type and sand mud-mud sand type.The Bottom features (coral reef and bright sand) greatly influenced the results, especially in shallow waters.For depth less than 18 m the root mean square (r.m.s.) error of predicted depth was 2.9 m and 6.1 m for coral ree-bright sand type and sand mud-mud sand type, respectively.But for depth more than 18 m, the bottom influence was decreased, and the r.m.s. error was measured 1.4m and 1.1 m, respectively.