Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

H (Human Geosciences) » H-QR Quaternary research

[H-QR04] Quaternary, Diachronic dynamics of human-environment interactions

Sun. May 20, 2018 3:30 PM - 5:00 PM A08 (Tokyo Bay Makuhari Hall)

convener:Mamoru Koarai(Earth Science course, College of Science, Ibaraki University), Toshihiko Sugai(Department of Natural Environmental Studies, Institute of Environmental Studies, Graduate School of Frontier Science, The University of Tokyo), Kiyohide Mizuno(国立研究開発法人産業技術総合研究所地質情報研究部門, 共同), Minoru YONEDA(The University Museum, The University of Tokyo), Chairperson:KOARAI Mamoru(Ibaraki University), Sugai Toshihiko

4:35 PM - 4:50 PM

[HQR04-15] Analysis of Topography using “Rainbow Contour Map” (RCMap) and its applications

*Suginaka Yusuke1, Shinzaburo Hori1, Marie Noguchi2, Shigeko Ishiwata, Kunihiko Endo3 (1.Research Center of Computational Mechanics, Inc., 2.Paleo Labo co.,ltd., 3.Nihon University)

Keywords:digital elevation model, Rainbow Contour Map, Analysis of Topography

Recently, it became easely to get digital elevation model (DEM) with the airplane laser measurement.There are various methods for the terrain representation method using the DEM.(Yokoyama et al.,1999, et al.)

Although it is possible to create it by processing with GIS application, it is actually a work that everyone can easily do.

Rainbow Contour Map (RCMap) can be created and perform with Kashmir-3D.

The RCMap can be visually grasped by coloring the contour map like rainbow and expressing the change of the topography as a striped pattern.

However, when a sudden change in color tone is applied to the elevation value, when the contour width becomes dense, it becomes black and the change becomes difficult to understand.

On the other hand, when gradually changing the color tone to the elevation value, it becomes difficult to distinguish the change of the terrain represented by two adjacent colors.

So we tried to gray in a gently colored color with a width of 0.5 m. By doing so, the outline of the contour was emphasized, making it easy to find the change in two adjacent colors.

In addition, the gray band looks like a shadow when looking over the three-dimensional model, and it is easier to specify the inclination direction even with a micro topography with a small amount of topography change.