The procedure to obtain the satellite bathymetry includes water separation, spatial filtering, Glint and cloud correction. Fig. 3(a) shows Near infrared (NIR) band of Landsat 8 which is used to separate the water from land, wherein the NIR band reflects water and appears dark and it also reflects the land area and appears bright. As a result, the profile graph of the NIR band over the coastal area has two modes relating to water and land regions. Fig. 3(b) shows the smooth section with low values representing water, whereas the fluctuating high values represents land. In this case the threshold value is 7000 which is used to separate the water from land.