Articles | Volume 15, issue 4
https://doi.org/10.5194/nhess-15-723-2015
https://doi.org/10.5194/nhess-15-723-2015
Research article
 | 
02 Apr 2015
Research article |  | 02 Apr 2015

Amalgamation in landslide maps: effects and automatic detection

O. Marc and N. Hovius

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Short summary
We present how amalgamation (i.e. the mapping of several adjacent landslides as a single polygon) can distort results derived from landslide mapping. Errors on the total landslide volume and power-law exponent of the area–frequency distribution, resulting from amalgamation, may be up to 200 and 50%, respectively. We present an algorithm based on image and DEM analysis, for automatic identification of amalgamated polygons, allowing one to check and correct landslide inventories faster.
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