The Environment Ministry is creating its first climate atlas, a fledgling attempt to chart atmospheric trends to spur more environmentally friendly city planning.

The so-called environmental climate atlas, which makes a case study of Minato Ward, Tokyo, will be included in a heat island report to be released later this month, ministry sources said.

The atlas is designed to provide detailed climate data to help city planners encourage the development of cooler and cleaner cities, ministry officials said.