In this paper, we discuss a map generation tool for RobocupRescue Simulation(RRS). RRS is a multi-agent test-bed and simulates large-scale natural urban disasters and rescue activities. RRS needs many maps of various regions for disaster analysis. However, RRS has provided a small number of map data yet. The reason is that an existing map generation tool creates maps which need a large number of manual modifications in order to be used in RRS. In addition, manually correcting errors takes a lot of time. Therefore, in order to correct errors in shorter time, we implemented a new tool that added functions to the existing tool. As a result, we confirmed the effectiveness of the implementation approach through many map creation.