SDF stands for Spatial Data Framework, which is a system used to manage and analyze spatial data. It provides tools and standards for organizing geographic information, making it easier for users to access and share data related to locations and features on the Earth's surface. The SDF is often utilized in fields such as geographic information systems (GIS), urban planning, and environmental management. By standardizing how spatial data is represented, it helps professionals make informed decisions based on accurate and up-to-date information about land use, resources, and infrastructure.