This book is a compilation of diverse, yet homogenic, research papers that discuss current advances in Earth Observation and Geospatial Information Technologies to tackle new horizons concerning the digitization and information management in smart cities' infrastructures. The book also tackles the challenges faced by urban planners by the new mega-cities and proposes a series of solutions to resolve complex urban issues. It suggests enhancing the integration of disciplines, thus, bringing together architects, urban planners, civil engineers, landscape designers and computer scientists to address the problems that our cities are facing. This book is a culmination of selected research papers from IEREK's fourth edition of the International Conference on Future Smart Cities (FSC) and the fourth edition of the International Conference on Resilient and Responsible Architecture and Urbanism (RRAU) held online in collaboration with the XMUM, Selangor, Malaysia (2021).