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Geosciences 2018, 8(7), 261; https://doi.org/10.3390/geosciences8070261

Exploring the Impact of Analysis Scale on Landslide Susceptibility Modeling: Empirical Assessment in Northern Peloponnese, Greece

Department of Geography, Harokopio University, El. Venizelou 70, 17671 Athens, Greece
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Received: 23 May 2018 / Revised: 5 July 2018 / Accepted: 8 July 2018 / Published: 12 July 2018
(This article belongs to the Section Natural Hazards)
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Abstract

The main purpose of this study is to explore the impact of analysis scale on the performance of a quantitative model for landslide susceptibility assessment through empirical analyses in the northern Peloponnese, Greece. A multivariate statistical model like logistic regression (LR) was applied at two different scales (a regional and a more detailed scale). Due to this scale difference, the implementation of the model was based on two landslide inventories representing in a different way the landslide occurrence (as point and polygon features), and two datasets of similar geo-environmental factors characterized by a different size of grid cells (90 m and 20 m). Model performance was tested by a standard validation method like receiver operating characteristics (ROC) analysis. The validation results in terms of accuracy (about 76%) and prediction ability (Area under the Curve (AUC) = 0.84) of the model revealed that the more detailed scale analysis is more appropriate for landslide susceptibility assessment and mapping in the catchment under investigation than the regional scale analysis. View Full-Text
Keywords: landslide susceptibility; analysis scale; landslide inventory; cell size; logistic regression; GIS; Greece landslide susceptibility; analysis scale; landslide inventory; cell size; logistic regression; GIS; Greece
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Polykretis, C.; Faka, A.; Chalkias, C. Exploring the Impact of Analysis Scale on Landslide Susceptibility Modeling: Empirical Assessment in Northern Peloponnese, Greece. Geosciences 2018, 8, 261.

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