The comprehensive understanding of marine areas necessitates the integration of diverse spatial and nonspatial data. The management of marine areas aims to achieve specific objectives, and this involves employing suitable methods to collect data from various sources, including social, environmental, economic, and cultural data adhering to EU standardization. By utilizing an appropriate data collection methodology, a knowledge base is established. This base not only provides insights into existing data from external sources but also facilitates the creation of new datasets. This integration of diverse data sets forms a robust foundation for informed decision-making in marine area management.The book "Marine Spatial Data Infrastructure" is designed to cover these essential aspects. It aims to explore and underscore the importance of Marine Cadastre (MC) and Marine Spatial Data Infrastructure (MSDI) within the context of Marine Spatial Planning (MSP), Blue Economy (BE), and Blue Growth (BG) in the scientific community. The book deals with the critical role that MC and MSDI play in managing marine and maritime domains, providing a spatial framework to enhance efficiency, sustainability, and equity. It aims to provide insights into the methods of collecting, managing, and utilizing spatial data in the context of marine areas.