No element of national park landscapes are untouched by past or present human activity. However, new technologies, more people, and changing lifestyles mean that our potential to change the environment and the appearance of the landscape is far greater now than in any previous generation. In the context of the 75th anniversary of National Parks and Access to the Countryside Act (1949), the UK’s National Parks urgently need accurate data on historical landscape features to conserve, enhance and restore the cultural and natural environment. This project aims to create the first historical digital twin of protected landscapes, focusing on the Peak District National Park (PDNP) and South Downs National Park (SDNP). Using the MapReader software that emerged from the AHRC-funded Living with Machines, we will analyse nineteenth-century and twentieth-century Ordnance Survey maps provided by the National Library of Scotland to measure and quantify past landscapes, with an emphasis on built and natural environments particular to specific park landscapes.