Land use change monitoring based on HJ-1A/1B imagery in the three gorge region

摘要

Land use change information is an important regional geo-hazards analysis factor in geo-hazards monitoring, and it can provide a reference for follow-up hazard risk warning. The technology of independent satellite land use remote sensing monitoring is now becoming more mature. Taking Fuling District of the Three Gorges region as the study area, this paper uses two different temporal HJ-1A images for analyzing land use change of Fuling District. After preprocessing, the classified images are produced by likelihood classification. Finally, result analysis is based on the classified images, and only the NDVI images and Water body vector data are used for the aim of geo-hazards warning analysis. Change analysis results show that water area expanded, civil land increased a little, and other is relatively unchanged.