写真測量とリモートセンシング
Online ISSN : 1883-9061
Print ISSN : 0285-5844
開度による地形特徴の表示
横山 隆三白沢 道生菊池 祐
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ジャーナル フリー

1999 年 38 巻 4 号 p. 26-34

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Overground-openness and undergroundopenness are defined for a grid point on digital elevation models. The former is a characteristic quantity to describe sky extent over the point within a distance L and takes large values for convex landf orms. The latter is to describe underground extent and takes large values for concave landforms. These concepts are applied to 50m-mesh digital elevation model of Mt. Iwate to make openness maps of L=5km and L=0.5km. The maps were found useful to represent topographical features such as the lines of ridge and valley.

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© 社団法人 日本写真測量学会
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