Bathymetry Calculations with Landsat 4 TM Imagery under a Generalized Ratio Assumption

摘要

In this paper we use the linear multiband algorithm on two channels of a Landsat 4 TM scene and demonstrate its improved performance over the two-band ratio method. The Landsat scene (scene 5032614162) taken 21 Jan. 1985) contains Isla de Vieques, an island off the southeast coast of Puerto Rico in the Carribean Sea. The water clarity in this area is extremely good, and bottom reflectances in the blue and green channels (TM bands one and two) are detectable for depths up to 25 m. Bottom reflectances in the red channel (TM band three) are detectable for depths up to approx 6 m; sensor noise (striping) over the water renders this band useless at deeper depths. Reprints. (RH)