Tools for answering questions such as “How would changing to a new pattern of land use affect the distribution of benefits and costs among stakeholders?” must be able to do several things. They should be able to model biophysical processes in time and space, link these models to farm and regional economic models, include a wide range of stakeholder values and the land uses by which they are realised, provide a participatory process that addresses conflicts, encourage participants to find new opportunities and win-win solutions, and support the process with transparent, user-friendly interactive software. Currently no one tool can meet all these criteria. Easy access to accurate data needed for these land use allocation tools also needs addressing.