Geomorphological slope units of the Himalayas

Slope units represent surface slopes by means of polygons delimited drainage and divide lines obtained on a digital topography. Objective slope unit delineation for given elevation model is still an open issue and, often, limitation that may dictate the use more traditional pixel-based approach spatial analysis. Availability maps facilitates many kinds studies allows scholars to focus specific scientific issues rather than preparing sound mapping from scratch their research. Here, we present map large portion Himalayas. The prepared following widely tested, parameter-free optimization algorithm. area encompassed relevant well-known 2015 Gorkha earthquake monsoons, which makes it vast community working in natural hazards including, but not limited to, landslide scientists practitioners. contains 112,674 with average 0.38 km2 published vector form. accompanied selection data including morphometric thematic quantities. In addition describing rationale behind polygonal selected data, describe application devoted unsupervised terrain classification. We applied k-means clustering procedure two strategies: one at (coarser) basin scale (finer) scale. show similarities differences between classification strategies, highlighting role subdivision cases.