Digital Earth is a virtual representation of the Earth that allows users to explore and engage with massive amounts of historical, natural as well as cultural data about the planet. It is made up of Earth observation data that is multi-typed, multi-resolution, and multi-temporal. It also encompasses socio-economic data integrated with suitable analysis algorithms and models. The visualization of digital Earth includes a digitally formatted Earth that is directly accessible to internet-connected global inhabitants. Digital Earth employs digital technologies to model Earth systems including the social and cultural facets, which characterize human societies on Earth. This book is a compilation of chapters that discuss the most vital concepts on digital Earth. It aims to shed light on some of the unexplored aspects related to its visualization, analysis and future trends. This book is a complete source of knowledge on the present status of this important area of study.