Abstract
Abstract. There are many methods to express topographical features of ground surface. In which, contour map has been the traditional method and along with development of digital data, surface model such as shaded relief map has been using for ground surface expression. Recently, data acquisition has been developed very much quick, demanding more advanced visualization method to express ground surface so as to effectively use the high quality data. In this study, the authors using the Red Relief Image Map (RRIM, Chiba et al., 2008) to express ground surface visualization for a variety of map scales. The authors used 30 m mesh data of SRTM to show the topographical features of western Mongolian and micro-topographical features of ground surface in tectonically active regions of Japan. The results show that, compared to traditional and other similar methods, the RRIM can express ground surface more precisely and 3-dimensionally, suggested its advanced usage for many fields of topographical visualization.
Highlights
Digital terrain data has been developing quickly and more and more high resolution data acquired by globally and locally
We expressed ground surface using the RRIM, a visualizing method which invented more than ten years ago (Chiba and Suzuki, 2004, Chiba et al, 2008)
This study suggested that the SRTM1, a 30 m mesh open data, can be used to illustrate topographical features, such as surface ruptures or the deformations applying appropriate visualization methods, especially in dry area such as Mongolia to detect large scale deformation of surface ruptures or other topographical features in large map scale, such as in Figures 3 to 7
Summary
Digital terrain data has been developing quickly and more and more high resolution data acquired by globally and locally. These digital elevation or surface data is useful for visualize topographical features. There are many methods to express topographical features of ground surface. Contour map has been a traditional method to express ground surface. Contour map is very difficult to shows the detailed features in large scale map. Shaded relief map is a traditional method to visualize ground surfaces, but the topographical features appears differently depend on the direction of light. We used high resolution Airborne LiDAR data to express micro topographical features in small map scale
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