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Relief shown by hachures and spot heights.
Scale given as 1:900,000. Actual scale is 1:9,000,000.
Depths shown by soundings and isolines.
Relief shown by shading, form lines and spot heights. Depths shown by soundings and isolines.
Relief shown by hachures and spot heights. Depths shown by soundings and isolines.
Relief shown by contours, shading and spot heights. Depths shown by soundings and isolines.
Relief shown by contours and shading. Depths shown by soundings.
Relief shown by contours and shading. Depths shown by soundings and isolines.