Long term planning for additions and improvements to the spatial organization and content of urban areas. It concerns planning for interaction between people, businesses, government, transportation infrastructure, mass transit, water and power infrastructure, pollution, waste management, and other broad and long term interests in an urban setting. For the overall management of urban areas, encompassing the setting of objectives for urban life, the establishment of policies, and the planning, development, operation, and maintenance of the urban environment and services, use "urban management." For the field concerned with designing the specific appearance and function of cities, use “urban design.”

Source: AAT

http://vocab.getty.edu/page/aat/300054427