
Feather-shaped scheme of radial settlement axes with green wedges kept open between them
Pioneering green-wedge/axial model for structuring an organic city-region
Drawn up from 1919 by Hamburg's Oberbaudirektor Fritz Schumacher, the Federplan ('feather plan') is named for its feather-like form: building was concentrated along radial settlement axes fanning out from the city centre along existing rail and traffic routes. The wedge-shaped spaces between the axes were to be kept free of construction and reserved as residential green and open spaces, linking the dense city to the landscapes of the Elbe, the Alster valley and the surrounding geest. Schumacher treated Hamburg as the 'natural centre' of its region and structured growth organically rather than as a closed ring, extending the scheme out to neighbouring towns and districts such as Bergedorf.
The Federplan is an early and influential example of axial, green-wedge regional structuring, anchoring open green corridors as an integral part of a metropolitan growth plan. It shaped German Stadterweiterung and regional-planning thinking and stands alongside other interwar axial visions for ordering the growth of a city-region around radial development and intervening green space.
Only partially realised in Schumacher's lifetime, the plan's radial-axis-and-green-wedge logic endured: it was developed into Hamburg's landscape-axis and 'Green Network' (Grünes Netz) system from the 1980s onward and is still cited as the foundational concept for the city's green structure and metropolitan development today.