| Geographical understanding is a process of human's observation, learning, familiarity and cognition for a certain regional physical Geography, humanistic Geography, resources and features. It is the premise of people's knowing and remolding the nature and regional development, and it is also the method and approach of human's gaining knowledge and recognizing the surroundings. There is vast territory in western region, and geographical conditions are various. In the aspect of physical Geography ,it diversifies the physiognomy , climate biology and hydrology , while, in the aspect of humanistic geography , Central Shaanxi Plain is one of the birthplaces of china ,and it is the place in which many dynasty's capitals were built ,such as Zhou ,Qin and Han Dynasties . So, in a long time, it is of great importance in geopolitics. And Central Shaanxi Plain is the semi-ring region where there are different nationalities, the national geographical features are obvious, and the national social custom are in varied colorful splendor .However, on the contrast to the importance of the historical standing and rich geographical sediment of the western region in historical times, it is weak in the special research on the history of geographical understanding. Generally speaking, it is still an academic black space at present. So this doctoral thesis ,by selecting the western region in Tang and Sung period when there are many historical changes as the target of time and space ,also making the history of geography as a view point ,on the base of lots of historical... |