Bathymetry Mapping from Satellite Images for Ly Son Island, Quang Ngai Province

• Main Authors: Le, Nhu Nga, Nguyen, Thi Kim Nga
• Format: Article
• Language: English
• Published: VNU 2014
• Subjects: Map; Bathymetry; Ly Son Island; Quang Ngai Province
• Online Access: http://repository.vnu.edu.vn/handle/11126/4525
• Institution: Vietnam National University, Hanoi

Up to present, in Vietnam, the traditional methodsused to map marine bathymetry are still very popular. These techniqueshave advantages of giving a high accuracy but still show big disadvantages of takingtoo much time for the data acquisition and processing and of being very expensive for the field works. Compensated to these cons the remote sensing technique seems to be an ideal solution since the images covers almost places on the earth with very high frequency (hours) of acquisition and served with a reasonable price even some of them can be downloaded from the internet for free of charge. In this paper, LANDSAT-7 (ETM+) optical-multispectral image, a space-born sensor, of Ly Son Island area, Quang Ngai Province where the water is relatively clear was used, some state-of-the-art methods of bathymetry mapping fromoptical-multispectral satellite images were reviewed and tested, the data from marine chart was used for the model calibration and quality assessment, and the discussion on the potential of these data sources for mapping coastal areas of Vietnam was also conducted.