抄録
YOKOHAMA CITY'S ENVIRONMENTAL DESIGN SYSTEM (GENERALLY SPEAKING COMPREHENSIVE DESIGN SYSTEM), ESTAB-LISHED IN 1973, AIMS AT CREATION OF OPEN SPACES TO THE PUBLIC, THAT IS, WALKING AND RESTING SPACES FOR PEDESTRI-ANS IN PRIVATE BUILDING SITE FOR RELAXATION OF THE BUILDING RESTRICTION (FLOOR AREA RATIO AND BUILDING HEIGHT). IN 1985 THE SYSTEM PERMITTED THE EXISTING WOODED AREA PRESERVED IN A PRIVATE SITE AS ONE OF OPEN SPACES TO THE PUBLIC. MOST WOODED AREAS ARE LOCATED ON VERY STEEPER SLOPES. SO THEY ARE UNDERESTIMATED , BECAUSE OF BEING INFERIOR TO WALKING AND RESTING SPACES FOR PEDESTRIANS IN PUBLICITY AND ACCESSIBILITY. THE AUTHORS STRESS THE NEED TO ESTIMATE HIGHLY WOODED AREAS FROM THE VIEWPOINT OF ECOLOGY AND VISUAL AMENITY FOR CONSERVATION OF NATURAL RESIDUALS IN DENSED URBAN AREAS.
