Made to modify the General information area of the Andaman ocean from Tarutao Island GEBCO30 (Satun) to Satun province. GEBCO30 data and information with the map comparison after the boat comes to fix the bias of the information using two methods GEBCO30. GMT bias in editing I found that after modifying the depth will be careful not to exceed 3.85 meters or approximately 4 meters and compare the color reproductions of color reproductions by boat has a smooth map of the coastline, and technologists.Some focus on the area's jagged, especially to the South of Koh Tarutao and southwest of Tambon Koh Sarai, per EA.GEBCO data yotkhong neighborhood after modifying the method 1 and method 2 best of color reproductions GEBCO30. Before modifying most of the area is fairly rough, especially to the South of Koh Tarutao and southwest of Tambon.This area contains craters which MA the difference with data back to modify how the GEBCO 1 & 2 are half way.