Abstract
KFL&A Public Health makes use of several GIS tools to assist with problem solving and decision making based on geographic and demographic data maps. The Social Determinant of Health (SDOH) Mapper is a GIS tool that displays various social determinants of health layers as they apply to specific geographic areas, therefore allowing the user to visualize trends in marginalization and deprivation for a specified population in Ontario. This tool allows the user to more easily consider vulnerable populations in relation to other environmental and geographic data when making public health decisions.