Study On The Optimization Of The Three-dimensional Landscape Order Of Tongshan Ancient City In Dongshan County

The ancient city of Tongshan faces the sea on three sides and is built on the mountain.It has a history of more than 600 years.It is a famous historical and cultural city in Fujian Province.It has rich historical and cultural landscape resources,and still retains the original landscape pattern.Since modern times,with the rapid increase of population,limited land use,and lack of government control in a certain period,the scope of construction land has been continuously expanded and spread to the top of the mountain,the landscape on the top of the mountain has been gradually artificial,the original relationship between mountains,cities and people has been destroyed,the contour line with undulating rhythm has gradually become flat and monotonous,and due to too many new and additional buildings and too large volume,As a result,the original features dominated by historical buildings were covered up and replaced,the original "city" and "landscape" were integrated,and the layered facade landscape was destroyed.In recent years,with the ancient city being rated as a famous historical and cultural city in the province,facing the new development and protection requirements,how to optimize and reshape the "sea island mountain city" landscape order of the ancient city and improve the image of the ancient city is particularly urgent.This paper takes the ancient city of Tongshan as the research object and makes empirical analysis.First of all,according to the landscape characteristics of the island mountain city,the three-dimensional landscape order is proposed,and the framework for the analysis of the three-dimensional landscape order of the island mountain city is constructed from five aspects,namely,the relationship of sight,density,fluctuation,primary and secondary relationship,and hierarchical relationship.Secondly,under the guidance of the order analysis framework of the threedimensional landscape of the island and mountain city,the three-dimensional landscape of the ancient city of Tongshan is analyzed and the problems are studied and judged.In the aspect of sight relationship,the change characteristics of the city view scene are analyzed from different angles and different distances,and the results show that the scene is quite different;In terms of the relationship between virtual and real,the composition and proportion of natural and artificial patches on the facade and the three-dimensional spatial agglomeration degree of the building group are analyzed.The results show that the virtual and real levels in the valley section are single,the natural patches are the lowest,and the buildings in some areas of the ancient city are highly clustered;In terms of the undulation relationship,the analysis is carried out from two aspects: the coordination between the skyline contour and the natural terrain,the contour fluctuation,the contour rhythm rhythm and the three-dimensional spatial undulation characteristics of the building complex.The results show that the original mountain shape trend is destroyed,the contour lacks the visual focus,and does not form a visual unit rich in rhythmic changes;In terms of the primary and secondary relationship,the main body of the landmark building is analyzed from the aspects of volume,height,color,material,etc.The results show that the main body of the characteristic building is not obvious,and the color of the seashore foreground building is messy;In terms of hierarchical relationship,the outline of the building group is divided into foreground,middle scene and background for analysis.The results show that the foreground building is large,the middle scene is high,the buildings are clustered,the level is single,and the background is not coordinated with the original mountain.Finally,aiming at the problems found in the analysis,we propose targeted optimization strategies.It mainly includes five aspects,namely,the construction of a panoramic system of the roundabout,the formation of "city" and "green" integration,the "virtual" and "real" vertical cityscape relationship,the shaping of the skyline contour line of the city mountains,the highlighting of regional and distinctive architectural landscape features,and the formation of hierarchical relationships with clear layers,rich changes,and well-arranged.