Abstract
About the location of the district heating systems for effective use of sewage heat in urban area, Geographic Information Systems as its analyzing tool was developed and the optimized location was discussed in Tokyo based on the analyses of spatial conformity between heat demand and waste heat supply with this GIS. The characteristics of the relationships between demand and supply in each sewage treatment district and geographical influences were also discussed. Large amount of usable heat is shown in sewage treatment districts with long sewer lines, many occasions of heat collection and large amount of heat demand.
