Representation of topographical features by opennesses.

Yokoyama, Ryuzo; Michio, Sirasawa; Kikuchi, Yu

doi:10.4287/jsprs.38.4_26

Cited by 29 publications

(17 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Openness is a morphometric parameter developed by Yokoyama et al (1999Yokoyama et al ( , 2002, expressing the degree of dominance or enclosure of a location on an irregular surface. It is an angular measure of the relation between surface relief and horizontal distance.…”

Section: Topographic Opennessmentioning

confidence: 99%

Supervised landform classification of Northeast Honshu from DEM-derived thematic maps

Echigo²,

et al. 2006

Self Cite

View full text Add to dashboard Cite

Section: Topographic Opennessmentioning

confidence: 99%

Supervised landform classification of Northeast Honshu from DEM-derived thematic maps

Echigo²,

et al. 2006

Self Cite

View full text Add to dashboard Cite

“…Section X-Y and the rectangle, show the study section from Figure 14a, b, and the study area in Figure 14c, respectively. (b) Distribution of the late Cenozoic large calderas and Quaternary volcanoes superimposed on a map of positive openness which is one of the thematic maps derived from the 50 m grid-size digital elevation models (Yokoyama et al 1999;Prima et al 2006). Adapted from Yoshida et al (2005).…”

mentioning

confidence: 99%

Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc

et al. 2013

View full text Add to dashboard Cite

Abstract:We review the evolution of late Cenozoic magmatism in the NE Japan arc, and examine the relationship between the magmatism and the crust-mantle structure. Recent studies reveal secular changes in the mode of magmatic activity, the magma plumbing system, erupted volumes and magmatic composition associated with the evolution of crust-mantle structures related to the tectonic evolution of the arc. The evolution of Cenozoic magmatism in the arc can be divided into three periods: the continental margin (66-21 Ma), the back-arc basin (21-13.5 Ma) and the island-arc period (13.5-0 Ma). Magmatic evolution in the back-arc basin and the island-arc periods appears to be related to the 2D to 3D change in the convection pattern of the mantle wedge related to the asthenosphere upwelling and subsequent cooling of the mantle. Geodynamic changes in the mantle caused back-arc basin basalt eruptions during the back-arc basin opening (basalt phase) followed by crustal heating and re-melting, which generated many felsic plutons and calderas (rhyolite/granite phase) in the early stage of the island-arc period. This was followed by crustal cooling and strong compression, which ensured vent connections and mixing between deeper mafic and shallower felsic magmas, erupting large volumes of Quaternary andesites (andesite phase).Gold Open Access: This article is published under the terms of the CC-BY 3.0 license.The NE Japan arc is a typical island arc associated with a cold subduction zone. It is one of the most well-known island arcs on Earth and provides a useful model for our understanding of how subduction zones produce magmas, including andesites. The NE Japan arc is related to the westward

show abstract

“…A new method of visualizing the topography as a grayscale relief map (GRM) obtained from DEM data was developed in this study. This method combines two existing methods: the overground openness by Yokoyama et al [27] and the inverted slope by Yajima and Yamaguchi [28]. The overground openness describes a sky extent measured by a solid angle (steradian) over the point within a certain distance.…”

Section: Dem Visualization By the V Elementmentioning

confidence: 99%

“…Therefore, as shown in Figure 5b, mountain ridges (white) and valleys (black) are easily distinguishable in images generated using this new method. openness by Yokoyama et al [27] and the inverted slope by Yajima and Yamaguchi [28]. The overground openness describes a sky extent measured by a solid angle (steradian) over the point within a certain distance.…”

Section: Dem Visualization By the V Elementmentioning

confidence: 99%

Integration and Visualization of Mineralogical and Topographical Information Derived from ASTER and DEM Data

Kurata

Yamaguchi

2019

Remote Sensing

View full text Add to dashboard Cite

This paper proposes a method of combining and visualizing multiple lithological indices derived from Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) data and topographical information derived from digital elevation model (DEM) data in a single color image that can be easily interpreted from a geological point of view. For the purposes of mapping silicate rocks, carbonate rocks, and clay minerals in hydrothermal alteration zones, two new indices derived from ASTER thermal infrared emissivity data were developed to identify silicate rocks, and existing indices were adopted to indicate the distribution of carbonate rocks and the species and amounts of clay mineral. In addition, another new method was developed to visualize the topography from DEM data. The lithological indices and topographical information were integrated using the hue–saturation–value (HSV) color model. The resultant integrated image was evaluated by field survey and through comparison with the results of previous studies in the Cuprite and Goldfield areas, Nevada, USA. It was confirmed that the proposed method can be used to visualize geological information and that the resulting images can easily be interpreted from a geological point of view.

show abstract

Representation of topographical features by opennesses.

Cited by 29 publications

References 2 publications

Supervised landform classification of Northeast Honshu from DEM-derived thematic maps

Supervised landform classification of Northeast Honshu from DEM-derived thematic maps

Evolution of late Cenozoic magmatism and the crust–mantle structure in the NE Japan Arc

Integration and Visualization of Mineralogical and Topographical Information Derived from ASTER and DEM Data

Contact Info

Product

Resources

About