等深線データから作成した日本列島周辺の海底地形アナグリフ : 解説と地図

Anaglyph images and red-cyan glasses enable us to recognize topographic relief easily, including seafloor. Our former paper (Goto, 2012) showed anaglyph images on land produced from 10-m-mesh digital elevation model (DEM) of the Geospatial Information Authority of Japan (GSI) throughout all the territory of Japan. Izumi et al. (2011, 2012) showed submarine anaglyph images based on 3-5 second DEM along the Nankai trough and the Japan trench. However, there are no stereoscopic images such as anaglyph images on the shallow sea around Japan Islands because of the lack of detailed DEM.

This paper makes a one second (approximately 30 m) DEM processed from digital bathymetric charts of Japan Hydrographic Association. The submarine anaglyph images around Japan Islands produced from detailed DEM are exhibited, and a method for producing anaglyph image from digital bathymetric chart is described.

Fault-related broad deformations on seafloor can be identified by means of interpreting anaglyph images and this paper explains it in Ise bay as an example.