Using High-resolution Remote Sensing Images 1:10000 Land Use Situation

Land is the most basic resource for our living and development and it is also an important part of our country resources. Since the beginning of 20^th century, the world population has dramatically increased, With the rapid economical development, the lack of land is becoming a bottleneck for our further development. At the meantime, a lot of land resources are not optimally used. This leads the decrease of the land quality and the deterioration of the world environment. The continual development of the economy has been seriously blocked. Because of its importance, how to reach a good land resource use and how to monitor its change get more and more attention from different fields.In our country, we are facing the fact that there is a great amount of population and we do not have enough plantations. Therefore we need a good land resource management to achieve an optimal use with the current plantations. A countrywide investigation of the current land use has been finished. The future emphasis will be the investigation and statistics of the change of land use. This work is the most basic and important in the lifecycle of the land management. It is a complex work and needs a great amount of actual data. With the information retrieved in the investigation phase, we can speed up the information evolution in our land management.Remote sensing technology has features such as wide-region, real time monitoring, periodical information, and comprehensive information. All these features give the possibility for a fast, objective, precise updating of land use. Because of the wide scope of remote sensing information and the complexity of remote sensing image generation process, the remote sensing informationprocessing technology is far behind the remote sensing technology itself. An automatic, precise, and intelligent processing technology for land use information retrieved by using remote sensing technology is still not mature. In most cases, the precision of this process is lower than the precision done by human eyes. Since the new land use investigation in 1999, high-resolution image data has become the most important data resource of land use updating. Until 2002,10m-resolution multispectral image from SPOT5 satellite and 2.5m PAN data have been the main data resource for dynamic monitoring of land use. But currently there are not so many researches being done to find out how to effectively use SP0T5satellite images to update the land use information.The land use survey in partial area in Anning County, Yunnan Province has been worked out as an example based on the satellite image of SPOT5 with a spatial resolution of 2.5m and 10m. Enhancement, resolution mergence, and geometric corrections have been conducted in Erdas firstly. Then an interpretation key table has been established based on site investigation. Next the information about land use compartment and matching attribute were obtained with the interactive interpretation software developed on the platform of ArcGIS. Further more, layers with ArcGIS have digitized other geographic information, and attribute tables were established according to the requirement. At last overlaying analysis, database establishment, and land use type mapping have been conducted in the software of ArcGIS.