| Technology Application |
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Openness: A visualization parameter for two-dimensional relief |
| ZHANG Jie1,2, LIANG Mingjian3, SHAO Yanxiu4 |
1. Faculty of Earth Science, China University of Geosciences(Wuhan), Wuhan 430074, China;
2. Nanjing Center, China Geological Survey, Nanjing 210016, China;
3. Seismological Bureau of Sichuan Province, Chengdu 610041, China;
4. Lanzhou Institute of Seismology, China Earthquake Administration, Lanzhou 730000, China |
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Abstract As one of visualization parameters for two-dimensional relief, Openness does not require light source and is not affected by the shadow of adjacent terrain. The parameter places more emphasis on the concave and convex of the terrain, which improves the intuitive stereoscopic impression of images. Openness can be calculated from multiple DEM sources, and can analyze the landform characteristics at different scales as well. The estuary of the Minjiang Estuary has various types of landform structure; therefore, the authors chose the area as a study area and calculated its Openness parameter on the basis of SRTM (90 m) elevation data so as to study the initial application of the parameter in terms of topography. The results show that, in comparison with traditional two-dimensional visualization methods such as shaded relief, Openness could display a better image which highlights the concave and convex of the terrain and reflects more details of the topography.
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| Keywords
high resolution remote sensing image
multi-oriented
Gabor filtering
density of local feature points
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Issue Date: 23 July 2015
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2015,
Vol. 27
