Application Of Radar Image in Land-Use Dynamic Monitoring in Beijing

摘要

Due to severe weather with wide cloud and fog covers, it is generally difficult to acquire satisfied optic image from satellites for interpretation. This has an influence on land-use dynamic monitoring around Beijing in timely fashion. As a complementary data source, radar remote sensing has its advantage of less effect of weather in comparison with Landsat TM data. There are sufficient radar remote sensing data covering many regions of China. One of the national interests is to use the available radar remote sensing data to monitoring land use changes around big cities cross the country. In this research project, radar data captured in 1997, 1998 and 2000 covering the Metro Beijing together with TM images were applied to characterize the features of the main land use types and their changes for the past three years. Different techniques have been implemented for processing these remote sensing data. Automated processes for extracting land use change information were investigated. The techniques applicable to the radar data and to TM data as well as the precision of the results obtained for land use monitoring have been systematically compared.