Research and implementation of land use and cover change monitoring methods

Abstract

Concerning the monitoring of land use and cover changes, it is unable to achieve rapid intelligent dynamic monitoring through the traditional field survey method, though it can accurately reflect the condition of various types of ground objects. The paper uses remote sensing estimation technology to monitor change information and proposes reliable land use and cover change monitoring methods. First, the SPOT original images of two phases in the land cover change monitoring period are subjected to such preprocessing as geometric correction and image fusion to obtain remote sensing images with similar imaging conditions in different periods of the study area. Second, a change identification model is built through the spectral signature variation method, the image interpolation method, the principal component difference method and the classification and comparison method to get land cover change areas. Finally, the threshold method and the supervision and classification method are used to extract and qualitatively analyze land-use change identification information. Then a quantitative evaluation of the accuracy is performed. The adopted change information monitoring methods based on remote sensing can meet the requirements of monitoring with high accuracy, thereby achieving accurate automatic extraction and qualitative analysis of land use and cover change information.