The purpose of this webinar is to demonstrate the use of decision support tools and multi-purpose landscape analysis systems that can strengthen the ability of water suppliers to develop land protection strategies that address threats to drinking water sources. Land conservation emphasizes the permanent preservation of land around both groundwater and surface water sources. GIS analysis is an effective and accessible way to identify and rank source lands and can be used throughout the source protection process, providing an invaluable resource for inventories, prioritization and management. This webinar will demonstrate various GIS-based tools developed by The Trust for Public Land, their data layers, and describe specific applications of this information.