Building upon the DPU research platforms ‘The Heuristics of Mapping Urban Environmental Change’ (http://www.bartlett.ucl.ac.uk/dpu/mapping-environmental-change) and ‘Water Justice in Latin American Cities’, CASA’s world-leading methodological innovations in spatial analysis and the Urban Laboratory’s ‘Picturing Place’ methodology, this research seeks to develop innovative and critical strategies for the reading, writing and audiencing of maps. It adopts a participatory action-learning approach, enabling local community mappers to explore innovative pathways for reframing hegemonic cartographies and develop the writing of more inclusive representations. It interrogates the role that such representations can play in contesting xclusionary socio-environmental processes and open up spaces for collectively negotiated outcomes between marginalised citizens, planners and policy makers, ultimately contributing towards the planning of more democratic and sustainable cities. Taking into consideration the potential ethical, societal, legal and regulatory issues underpinning mapping, the research will apply innovative methods and rapid prototyping – such as 3D mapping, augmented reality, as well as 3D printing - to develop a digital archive in Jose Carlos Mariátegui and Barrios Altos, the two study sites in Lima (Peru). The main outputs are in the form of 3D models and a digital mapping platform. The latter will act as a repository for research on the urban Global South and an archive of knowledgeaccessible to those with interest in urbanisation, sustainability and justice. At the policy level, it will encourage better planning practices, representing wider citizens’ perspectives, ideals and aspirations. Moreover it will stimulate public debate and awareness and be a showcase for cross faculty and cross global collaboration.