中文摘要：

怎么有效地提取河网具有为水资源调查，洪水预报和监视的 enviromental 的大意义， etc.In 纸，与蚂蚁殖民地算法结合，河在中等决定的成像分光辐射函数( MODIS )上让遥感图象赚的提取的一条新途径通过分析河网络能被蚂蚁殖民地算法高效地优化的河 nets.The expriment 结果表演的二个一般抽取方法被建议，并且差别比率 betwe

英文摘要：

How to extract river nets effectively is of great significance for water resources investigation,flood forecasting and environmental monitoring,etc.In the paper,combining with ant colony algorithm,a new approach of extracting river nets on moderate-resolution imaging spectroradiometer（MODIS）remote sensing images was proposed through analyzing two general extraction methods of river nets.The experiment results show that river nets can be optimized by ant colony algorithm efficiently,and difference ratio between the experimental vectorgraph and the data of National Fundamental Geographic Information System is down to 8.7%.The proposed algorithm can work for extracting river nets on MODIS remote sensing images effectively.