The city of Leverkusen, Department of Cadastre and Surveying, has commissioned Virtual City Systems to create a 3D city model showing the entire city on a high-quality web map. This digital application will support the municipal administration, especially in the area of urban planning. The 3D city model makes it possible to visualize complex spatial relationships and make informed decisions. It facilitates the simulation of various development projects and evaluates their impact on infrastructure, environment and quality of life. The platform promotes dialog with citizens and increases their participation in urban planning in order to further develop Leverkusen in a sustainable and future-oriented manner.