摘要
Istanbul as a ＂third world＂ metropolis is a dynamic open system, where complex and multiple economical, social and physical conditions are overlapped. Still the city is a focus point of social （economical, cultural, and ethnical） and spatial dualisms and their genuine contradictions--polarizations particularly in the last 30 years. Istanbul＇s natural characteristics such as geographical conditions （slope topography and the physical relationship with the sea）, and also the artificial urban properties that include the historical architectural monuments, the industrial heritage, the contemporary urban transformation applications, the harbours and docklands as borderlines or in-between zones also identify this fragmented, hybrid, and divided urban structure. The Haydarpasa Harbour as an artificial urban borderline between the ruined and peak zones lJskudar and Kadikoy on the Asian side of the city is a kind of representative in-between area, an isolate city in city, which triggers the social and physical collage and ＂deconstructs＂ the development process of lstanbul＇s morphology. This paper aims to analyze these social and spatial aspects, which endure urban polarization in Istanbul. The underlying reasons of these contradictions and eventual outcome of the peak and the ruined zones in lstanbul and their border districts typologies will be analyzed. This paper will also make a compared evaluation of Haydarpasa Harbour （intersection point of two adjacent districts in Istanbul） and the completed urban design transformation projects/scenarios on the harbor area regarding the creation of a sustainable urban development for the city by enabling a new productive public space in-between [Jskudar （＂ruined＂ zone） and Kadikoy （＂peak＂ zone） in Istanbul.
