SAGA - Topographic Openness

Lighting and visibility calculations for digital terrain models.

SAGATERRAIN ANALYSISLightingvisibility
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contributed at 2018-11-06

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Topographic openness expresses the dominance (positive) or enclosure (negative) of a landscape location. See Yokoyama et al. (2002) for a precise definition. Openness has been related to how wide a landscape can be viewed from any position. It has been proven to be a meaningful input for computer aided geomorphological mapping.References:Anders, N. S. / Seijmonsbergen, A. C. / Bouten, W. (2009): Multi-Scale and Object-Oriented Image Analysis of High-Res LiDAR Data for Geomorphological Mapping in Alpine Mountains. Proceedings of Geomorphometry 2009. online at geomorphometry.org.Prima, O.D.A / Echigo, A. / Yokoyama, R. / Yoshida, T. (2006): Supervised landform classification of Northeast Honshu from DEM-derived thematic maps. Geomorphology, vol.78, pp.373-386.Yokoyama, R. / Shirasawa, M. / Pike, R.J. (2002): Visualizing topography by openness: A new application of image processing to digital elevation models. Photogrammetric Engineering and Remote Sensing, Vol.68, pp.251-266. online at ASPRS.

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SAGA (2018). SAGA - Topographic Openness, Model Item, OpenGMS, https://geomodeling.njnu.edu.cn/modelItem/8d9db558-1292-48a4-9cb7-fe02bde0f23c
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initial contribute: 2018-11-06

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