The City of San Francisco’s Department of Public Works’ Bureau of Urban Forestry (BUF), the Friends of the Urban Forest (FUF), Autodesk, and Online Mapping Solutions have worked together to develop a city-wide, dynamic online map of the city’s growing number of trees. The San Francisco Urban Forest Mapping System was developed using a combination of open source and proprietary mapping technologies, with MapGuide Open Source forming the central element. By integrating their two data sets into one, BUF and FUF now have a vital, technology-based tool for tree maintenance and management, enabling urban forest managers to inventory and map existing, future and past tree locations. The map will also be an online tool, allowing citizens to access tree data, report problems, upload personal tree information, such as photos and stories, and add information about privately owned trees to the city inventory. The new site will be launched as part of the Mayor’s Arbor Day events on March 10, 2007. For more information about the project, visit www.urbanforest.org.