A method of making a dataset for a sounding map from mass sounding data

Abstract

Continental Shelf Surveys Office has been conducting hydrographic surveys in the sea area around Japan and collecting enormous depth data. Because of the large data volume, in case of exceeding computer’s memory capacity, we have to go round to deal with the dataset, e.g. : dividing alarge dataset into several sub−datasets or dividing a broad focusing area into sub−areas. In order to tackle the problem, we have developed a new program which enables us to deal with a large volume dataset. In this report, we briefly introduce the new program and show a preliminary procedure of making a sounding map by using the program.