The Kuril-Kamchatka gridded digital bathymetry creation and analysis

In this paper, algorithms and an interface for creating detailed digital regular gridded bathymetry using digital sounding data are described, and examples of the data obtained for different regions of the Pacific are shown. In calculations of the depth at each grid point, the algorithm uses up to nine points from a data source. They are chosen using two criteria: the first one – they must be located in various sectors (N, NE, E, SE, S, SW, W, NW) from a calculating grid-point, and the second – they must be the nearest ones to this point in each sector. Then the spline interpolation is used for defining the depth value in the grid-point. Another algorithm uses linear interpolation for obtaining depth value at the grid-point. The new digital bathymery on a rectangular grid with 1 and 0.5 arc minute resolution has been created for the Kuril-Kamchatka region. These data consist of four rectangular arrays of depth, which cover a 200 km zone around the Kuril Islands and Kamchatka from 41.00° up to 61.00° Northern latitude. The comparative analysis of this digital bathymetry has been carried out.