Open AccessConstruction of nearshore elevation model using open satellite data
Author(s) -
A.E. Hmelnov,
A.S. Gachenko
Publication year - 2021
Language(s) - English
Resource type - Conference proceedings
DOI - 10.25743/sdm.2021.34.72.014
Subject(s) - elevation (ballistics) , underwater , contour line , satellite , subpixel rendering , pixel , remote sensing , computer science , digital elevation model , satellite imagery , elevation angle , geodesy , geology , artificial intelligence , computer vision , meteorology , azimuth , geography , mathematics , engineering , oceanography , geometry , aerospace engineering
For the tasks considering changes of water level it is required to have a combined (above water and underwater) elevation model. And the highest accuracy requirements are imposed on the parts of the model, which produce the contour lines in the range of the actual water level changes, while the information about the underwater elevation is usually very scarce and rough. In the article we consider the possibility to obtain this part of the elevation model using open high resolution (10 m/pixel) satellite images corresponding to different water levels. Here we describe the technique, which allows us to obtain the subpixel accuracy of the resulting contour lines. And we consider the problems in the quality of the satellite images that the contour lines reveal, and some ways to deal with the problems.