Government agencies are responsible for managing updated and authoritative as part of their operations. Recently Œopen government¹ has become a popular movement that promises transparency, engagement, and efficiency for agencies and citizens. Increasingly open government mandates are also requiring organizations to make their data freely available through the web. GIS is already at the heart of the majority of data management in government and also accounts for most of the open data that is intended for release. ArcGIS Open Data leverages your existing infrastructure to make your data discoverable, explorable, and accessible without any migration or additional workload. By aligning government open data to existing workflows as well as the architecture of the web, it's possible to readily fulfill these mandates and achieve agency vision.