A variety of web-based mapping and quantitative analysis tools can help planners evaluate whether a given land use efficiency strategy can meet goals, but there has been limited information about the coverage, breadth, and availability of these tools. These tools can assist in the regional implementation of greenhouse gas reduction strategies through land use development. As such, decisionmakers would benefit from knowing which of these tools could serve their needs. Researchers at UC Davis studied methods and tools available to regional and local governments to evaluate the land use efficiency and equity of their policies and plans. The research team then conducted a workshop with regional and local government representatives to identify efficacy, gaps, and potential improvements for these tools.