Physical Density and Urban Sprawl: A Case of Dhaka City - KTH

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existing and previous maps are compared to explore the changes of FAR values, percentage of land coverage by buildings, setbacks and layout of plots, and space usability. Analysis of Aerial photograph Aerial photographs are the main source to calculate the block size, land coverage by buildings, plot sizes, number of storeys of building, setback and open spaces. The aerial photographs are collected by the ‘Google Earth’. The dimensions are measured by using the ‘ruler’ tools of the ‘Google Earth’. The measurement procedures are described as follows: Measurements The dimensions of plot, land covered by building, total block area, area of open space, setback and number of storeys are measured to calculate the physical densities. All dimensions are collected from the aerial photographs which are available in the ‘Google Earth’. The dimensions are measured by using ‘Google Earth’ tool which is called ‘ruler’. The measurements of physical densities in terms of FAR, percentage of land coverage by buildings and open space are conducted at block level. Applied procedure to measure the height of building: The building heights are measured to calculate the number of floors. Numbers of floors are required to calculate the total floor area which means the area of ground floor including its wall thickness multiplied by its number of storeys. The building height is calculated from the shadow of building which is available in the aerial photograph of Google earth. The author has also suggested his appointed friends to visit the selected area to get data about the number of floors of the buildings. Then collected and measured data has compared each other to reduce error. According to the Bangladesh National Building Code (BNBC, 1993), the height of each floor should be minimum 3 meters. Figure 1.3 shows procedure to measure the height of buildings. In this figure the shadow length is 15 meters which has been calculated from the aerial picture provided by the ‘Google Earth’. So it can be assumed that the building is 5 storeys because the height of each building is approximately 3 meters. Figure 1.3: The diagrammatic presentation of the height calculation (Google Earth, 2007 and adapted for this current study) 8
Applied Procedure to calculate land coverage: In this study Land coverage means the percentage of land covered by buildings available in the selected block and total land covered by block. The total land covered by the block is calculated with the half of its surrounding road width. Figure 1.4 is showing the procedure of land coverage calculation. Figure 1.4: Procedure of land coverage calculation In the figure 1.4 BW = Block width with half of the surrounding road width, BL = Block length with half of the surrounding road width and Block area (BA) = BL x BW. If the total built up area inside the block = A1 (Addition of the ground floor area of all buildings inside the block), the percentage of land coverage by built up area= (A1/BA) x 100 Applied Procedure to calculate floor area ratio (FAR): The FAR indicates the ratio of built area and total land covered by the block. The area of total land coverage by the block Figure 1.5: Calculation of the floor area occupied by individual building 9
Page 1 and 2: KTH Architecture and the Built Envi
Page 3 and 4: CHAPTER 6: FINAL ANALYSIS..........
Page 5 and 6: ABSTRACT Md. Syful Islam: Physical
Page 7 and 8: CHAPTER 1 INTRODUCTION This study a
Page 9 and 10: Habraken (1998:292-93) states that,
Page 11 and 12: Since the study is dealing with the
Page 13: Banani Model Town residential area
Page 17 and 18: CHAPTER 2 THEORY OF THE CONCEPTUAL
Page 19 and 20: crowded and unsuitable environments
Page 21 and 22: unrealistic because tall buildings
Page 23 and 24: Carlos Barquin et. el. (1986) emplo
Page 25 and 26: Fig 2.7: Cluster of Informal settle
Page 27 and 28: Figure 3.1: Physical growth of Dhak
Page 29 and 30: Until 1951, Bangladesh was almost c
Page 31 and 32: 3.5 Land use pattern of Dhaka city
Page 33 and 34: construction is illegal while squat
Page 35 and 36: even accuse RAJUK, the most promine
Page 37 and 38: CUS, the number of informal settlem
Page 39 and 40: Figure 3.9: Ratio of formal and inf
Page 41 and 42: CHAPTER 4 FINDINGS FROM THE INFORMA
Page 43 and 44: Spatial qualities Spatial qualities
Page 45 and 46: settlement are selling their daily
Page 47 and 48: The houses are very close to one an
Page 49 and 50: Figure 4.15: The space inside the h
Page 51 and 52: It can be seen from the findings of
Page 53 and 54: 5.2 Shobhanbagh officers’ colony
Page 55 and 56: . Figure 5.4: Aerial photograph of
Page 57 and 58: CHAPTER 6 FINAL ANALYSIS Chapters 4
Page 59 and 60: narrow roads for drying and washing
Page 61 and 62: CHAPTER 7 RECOMMENDATIONS AND CONCL
Page 63 and 64: of proper monitoring in housing mar
Page 65 and 66:
Nnaggenda-Musana A., (2004), Sprawl
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Physical Density and Urban Sprawl: A Case of Dhaka City - KTH

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