HIGHLIGHT The first book about PostGIS, a lightweight, open source tool that adds geographic support to the popular PostgreSQL database. PostGIS is used to develop location-based services. DESCRIPTION From mobile phone usage to online shopping and every application in between, location is an incredibly important piece of data. PostGIS is a high-caliber, open source tool that allows developers to take location information and make it actionable. PostGIS in Action will help both new and experienced database users solve location-related problems. For those with experience in more traditional relational databases, this book provides a background in vector-based GIS so they can quickly move on to analyzing, viewing,