Abstract:
Urban expansion is one kind of phenomena occurred in Bangkok, in which caused by high amount of population in a limited area. As a result, the cost of land and the quantity of tall buildings are higher so as to use the area effectively. According to the data from Landsat TM, the finding suggests that thermal band can indicate the relationship between the landuse and surface radiant temperature. The higher density of building occurred, the higher surface radiant temperature encountered. In addition, satellite imagery and aerial photograph signify the relationship between the building height and surface radiant temperature in building clusters. The result showed that 1-23 meter tall building clusters have the highest surface radiant temperature. Apart from the height of building, the building pattern can effect surface radiant temperature as well. For example a lot of closed buildings with the same height i.e. residential buildings, commercial buildings, real estate housings, factories, and, warehouses can increase surface radiant temperature. Dense small houses also increase surface radiant temperature. For the above reason, we can conclude that surface radiant temperature derived from the satellite thermal sensor can beneficially apply to use in urban planning and landscape design so as to reduce the heat radiated from buildings.