Urban spatial enclosure
The aim of this paper is to address transitional factors in urban spatial enclosure, proportion, and ratio in the urban fabric as characteristic attribute of historical area. Gonabad city includes historical areas however redevelopment process transited and effected urban landscape. Considering to the urban form and landscape verify the physical aspects mainly enclosure form have changed the landscape and form regarding destroying, redeveloping, and planting trees, however, other factor can be challenged in this process particularly cultural lifestyle. Methodology of the research designed on the qualitative method and graphical analysis technique. Therefore, data was collected by survey techniques in three areas including historical, transitional, and new development. Findings identified that enclosure ratio in the historical part was between 6a-a, that demonstrated the complete enclosure forms in the area but in the transitional between 2a-1/2a as half enclosure and new development areas between 1/8a to 1/2a as less enclosure. Findings identified diversity in the urban landscape form regarding enclosure indicator in two categories including Mass-Space proportion and complementing compounds. As conclusion could contribute that, there is dehistoricisation process in historical especially in transitional part that changes the urban landscape although some historical and traditional landscape elements still exist. The city is lost its specification however; traditional components and compounds could conserve and utilise for historicisation places and locations.