The Analysis Of Changes Of In New Cities Over A Period OfTime, Sample Study Of The New City Hashtgerd

New cities in social and economic systems has been widely changed, so a precious andcomplete definition did not established and each society has defined that according toit's special applications.By the way new cities has a special " birthday" and build in a short and definite time.such cities are the opposite point in compare with creation and revolution ofcentralized cities which base on a core slowly before their creation .new urbanplanners usually make cities based on prediction of estimated population, so the futurerequests on frame work, social and economic matters will considered . design andbuild of new cities generally made in virgin land without a core .Making new cities in Iran beside of Tehran and big cities was a new experiencethrough two previous decades which made designers, planners and managers to beencountered with new problems.These cities has been planned after facing with the development problems ofmetropolises and specially the civilization problems.For de-centralization of very big cities (metro polis) with a population andlimitation of physical.