Metropolitan region and its spatial organization:Case study, Tehran

The increase of urban population and its post-effects is one of the currentproblems and difficulties of the people at the world, regional, or national scales. Therise of metropolitan of Tehran in our country has changed the urban order. Its spatialexpansion not only has created new alleys, city divisions, and new towns, but alsochanged the small and old population centers of suburban villages into theconcentrated population poles. As a result, the unique spatial order established before1335 in Tehran and its suburb, were altered due to some economic, social, and politicalactivities and all the city and its periphery were developed to an enlarged spatialorganization. This process of changes created a new form of spatial organization whichis now called "urban region", "urban complex", or "urban system".