Fig. 1From: The use of open source GIS algorithms, big geographic data, and cluster computing techniques to compile a geospatial database that can be used to evaluate upstream bathing and sanitation behaviours on downstream health outcomes in Indonesia, 2000–2008The final DEM used to delineate upstream villages for each of the villages in Indonesia. The DEM contains over 347 million measures of elevation and is hydrologically enforcedBack to article page