Resumen
Clay played a decisive role as a building material in the Austrian Weinviertel region. Its traditional use in vernacular architecture started to disappear in the 19th century, triggered, for example, by upcoming industrial processes to produce construction materials such as burnt bricks, and by making them available as mass building products in course of the time?even for vernacular purpose and at remote places. Following a debate on ecological sustainability during the last decades, the striking advantages of clay as a building material have been rediscovered. However, to support restoration activities and develop new uses, a vital and profound knowledge of properties of the local clay and its traditional local use is required. It is therefore important to increase the knowledge of this unique heritage among the local population and the scientific community. This article aims to present the development of an earth building cadastre (Lehmbaukataster) based on an innovative Citizen Science approach using mobile technologies for activating and integrating the local population with specific local and historical knowledge of earth architecture in the Weinviertel. The results show that citizens can provide essential information to develop a cadastre on earth buildings. Supported by a web application with GPS location facilities, camera, and low entry barriers, citizens can contribute to the expansion of the scientific database. The research results are a strong impetus for the development of strategies for the valorization and protection of cultural heritage.