On the topographic representation in hydrographic survey, the writing left by the late Mr. Komukai.

Since break of submarine topography can not be detected directly, its representation must influenced according as the accuracy of survey and the character of the topography itself. Discussing these influences in this treatise, we have obtained following conclusions: The limits for representation by the scales of obtained geomorphological charts are almost equal for scales 1/8,000,000 and for 1/4,000,000. However, in the charts of larger scales, 1/500,000,1/50,000,1/20,000 to 1/10,000, and 1/3,000 to 1/1,000, topographies corresponding to various kinds of classification can be represented according as the scale. Dimensions of various topographies classified to “ large”，“small”，and “micro” topographies can be represented as the power of ten, i.e., for example, widths of terraces of the order of magnitude of 100 km in the case of large, 10km for small, and 1km for micro-topographies. Thus, dimension is represented as exponential function of scale. Also the span of isobaths is represented as an exponential function of scale.