Modern cities with tall building clusters can create powerful and distinctive features on the skyline more so than those with scattered tall buildings. In terms of their role in the city, tall building clusters can improve the image of the city, provide for high population density, and distinguish the urban centers. However, the planning of tall building clusters needs to be conducted using in-depth analysis in response to the spatial context to create an attractive skyline. This research attempts to compare different layouts of tall building clusters organized in circular, rectangular, and linear geographical areas. Their impact on the skyline was determined by analyzing the visibility and height transitions of these tall building clusters. Grasshopper was used to calculate the degree of surface visibility of these tall buildings from observers in urban spaces. To quantify the height transition of the cluster, the obstructed buildings were identified and mapped on the skyline viewed from a specific viewpoint. The results showed that the linear cluster had high visibility, followed by the circular and rectangular clusters. Decreasing the heights from the center to the periphery supported the focal point of the cluster.
Visibility is an important factor for decision-making regarding the visual quality of the skyline of modern cities which dominated by tall buildings. The basic method of visibility is referred to the concept of targeted isovist that represents the visible portion of the target area of tall buildings. This paper presents a reliable method of visibility analysis for tall building clusters, examining all unobstructed views of those clusters from surrounding streets and their impact on the shape of skyline, using Jakarta as a case study. The visibility algorithm was developed with Grasshopper and building models were simultaneously simulated using Rhinoceros 3D. The results are presented with a color segment that represents the percentage of visible viewpoints and the visible area of a building's facade. The results showed that building height configurations, the location of buildings, the relation to the street, and the distances of various viewpoints have a significant effect on the rate of visibility. Moreover, the level of visibility of tall building clusters determines the shape of the skyline. The proposed visibility analysis method is expected to be an essential tool in the planning and design of tall buildings in a clustered organization for shaping the city skyline of the future.
Settlement of north Kampung Code which located on the riverbanks of Kali Code in Yogyakarta, has a diversevisual character, so that visually appear to be dynamic and irregular.Yusuf Bilyarta Mangunwijaya participatefully in shaping the visual character of the settlement of the north Kampung Code. The aim of this research is toknow the effect of characteristics design of YB. Mangunwijaya on the visual character of settlement riverbank inthe North Kampung Code.Quantitative-rasionalistic method was used in this research, based on the results of respondents answer inobservation the visual character of the north Kampung Code settlement. Testing using the test statistic basedfrom the answer of the respondents to the questionnaire. Quantitatively, the study was determined using outputrating statistics. Then the hypothesis testing was done through a linear regression analysis which serves toidentity that effect. Test conducted on the variable of characteristics design of Mangunwijaya consists of unitedwith nature, local, efficient, honest, detail and creative.The conclusions is a significant effect the characteristics design of YB. Mangunwijay on the visual character ofthe north Kampung Code was shown in this work.Correlation between respondents answer with theoryexplanation. Interpretation of this research was not every factor in forming the visual character can beunderstood properly by the observer.Key words: Visual Character, Characteristics Effect, The North Kampung Code, YB. Mangunwijaya
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