Use Investigation Updating ——A Case of Jiaonan city

Land management affects national economic safety, food security, ecologi-cal safety, and also affects the economic and social development. Having the accu-rate basic data of land is the basic of im-plementing the scientific development and playing its special role in the land macro-control. Land use change infor-mation can help the government depart-ments of land make decisions which is relative to land use. With the continuous development of information technology, the method of land use change investiga-tion improved, now the mainly used is RS technology, GPS technology and GIS system technology for land use investiga-tion. Compared with traditional method, the way of land use investigation which uses the 3S technology have many ad-vantages, such as the high technology, the lower demand of the plot technology, the higher precision, the lower work inten-sion, the higher efficiency, the lower cost. The production is exhibited by digital map, it is easy to protect, take, copy, modify and share with the others. It is easy to build the land information system, it is used to achieve modify and detect about land resource. This paper mainly introduced the RS technology, GPS tech-nology and GIS technology how to do their work in land use, and their role in the methods which is adopted