JpGU-AGU Joint Meeting 2017

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[JJ] Oral

M (Multidisciplinary and Interdisciplinary) » M-GI General Geosciences, Information Geosciences & Simulations

[M-GI30] [JJ] Earth and planetary informatics with huge data management

Mon. May 22, 2017 9:00 AM - 10:30 AM 201A (International Conference Hall 2F)

convener:Ken T.Murata(National Institute of Information and Communications Technology), Kazuo Ohtake(Japan Meteorological Agency), Susumu Nonogaki(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology), Takeshi Horinouchi(Faculty of Environmental Earth Science, Hokkaido University), Chairperson:Ken Murata(National Institute of Information and Communications Technology), Chairperson:Susumu Nonogaki(Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology)

9:15 AM - 9:30 AM

[MGI30-02] Enhancement of Segment Tracing Algorithm for lineament extraction based on topographic characteristics

*Daiki Nakao1, Shinji Masumoto1, Tatsuya Nemoto1 (1.Guraduate school of Science, Osaka City University)

Keywords:lineament, STA, DEM, topographic characteristics

The Segment Tracing Algorithm (STA) is one of the effective methods to automatically extract lineament from the satellite image and shaded relief image generated from DEM. This algorithm can extract the lineament by extraction and connection of line elements. The line element is the cell having linear topographic feathers which is recognized by the change of the reflection intensity. Because the shaded relief image and the satellite image depend on the direction that irradiates light, extraction capability varies according to the lineament direction. The aim of this study is to extract lineaments from topographic characteristics based on DEM without using reflection intensity. The extraction processing of the lineament is as follows: (1) calculation of the normal vector of the topographic surface in each cell of DEM, (2) decision of continuous direction, (3) extraction of line elements, (4) connection of line elements, and (5) rearranging for the line. This method of each processing enhanced it, and optimized it.