Exploration of Land Development Intensity of the City Center District——The Old City of Nanjing as an Example

By studying the land development intensity in the old city of Nanjing,the impact factors are found,including traffic location,commercial spaces and historical style and features zone protection and so on.And based on the land surrounding metro site accessibility of Nanjing in 2050,the land development intensity model of the city is constructed.The social and historical aspects including commercial network planning and historic protection are evaluated and involved in the modification of the model.Ultimately,the rational utilization of land in the old city of Nanjing are realized.