This book explores how maps generated through geographical information systems (GIS) can be used to integrate principles of health equity and environmental justice into community planning and decision-making. To do this, the book puts forward the 3Ps of GIS mapping: People, Place and Policy. For each topic, the book demonstrates how different maps reveal different spatial disparities, and therefore alternative lens through which socio-cultural, political or geographical issues can be addressed. Using a step-by-step approach, and covering the core concepts by which GIS maps can be interpreted, it builds to provide a comprehensive understanding of what a GIS generated map may tell us, though crucially also what it may not. Featuring illustrated examples throughout, the book is essentially a tool-kit to support a nuanced and holistic perspective on community planning. It will appeal to policy-makers, planners, and public health consultants, as well as students moving towards this field.