The Population Distribution and Density 2005 and 2015 products contains spatial explicit information about population distribution at a certain degree, within the Core Urban Districts of Arusha. The following eight classes are identified, based on a frequency distribution analysis of the changes that occur: Unchanged Population Distribution; Up to –100% decrease; Up to 200% increase; 201% - 400% increase; 401% - 600% increase; 601% - 800% increase; 801% - 1000% increase; More than 1000% increase. The Population Distribution and Density product is estimated for all objects which belong to the residential class (LULC class 11), using 5 different data sources: LULC Product, WorldPop data (2005 and 2015 respectively) with a spatial resolution of 100m, official population census data from 2002 and 2012 (for 2005 and 2015 products respectively), Soil Sealing layer and Administrative Boundaries.