Generally speaking, also verified according to the shapefiles displayed in Fig. 9 and GIS database, in the density map of the number of buildings,deep color areas stand for big residential settlements and intensive commercial zones mainly found in the center district; in the density map of floor areas, deep color areas are mainly occupied by the multistory buildings used for residence and offices, in contrast with the high location area of some big commercial architectures and factories in the map of the location area; lastly in the density map of the building volume, the deepest color areas represent some big-scale buildings usually featured in both of the height and location areas.