HazMapper: a global open-source natural hazard mapping application in Google Earth Engine

Abstract

Abstract. Modern satellite networks with rapid repeat-cycles allow for near-real-time imaging of areas impacted by natural hazards such as mass wasting, flooding, and volcanic eruptions. Publicly accessible multi-spectral datasets (e.g. Landsat, Sentinel-2) are particularly helpful in analyzing the spatial extent of disturbances, however, the datasets are large and require intensive processing on high-powered computers by trained analysts. HazMapper is an open-access hazard mapping application developed in Google Earth Engine that allows users to derive map and GIS-based products from Sentinel or Landsat datasets without the time- and cost-intensive resources required for traditional analysis. Case studies are included for the identification of landslides and debris flows, wildfire burn extents, pyroclastic flows, and lava flow inundation. HazMapper is openly-available to the public and is intended for use by both scientists and non-scientists, such as emergency managers and public safety decision-makers. It is the intent of the authors to continue to develop HazMapper with additional capabilities. Collaboration on this effort is encouraged.

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