基于HJ-1号卫星数据灌区小麦提取应用研究

摘要

Acquiring accurate data of irrigated wheat land area and distribution timely can provide data support for water resource regu- lation and fighting against drought. This paper analyses the long - term wheat growing feature of Renmin Shengli Canal irrigation area using the data of HJ - 1 multi - temporal satellite, and studies the method of quick extraction of irrigated wheat land. The results show that distribution and area of irrigated wheat could be accurately extracted using the multi - temporal NDVI data of HJ satellite data be- fore winter and the accuracy is higher than 90%.%及时准确获取灌区小麦分布和面积,可以为流域水量调度、抗旱减灾提供数据支持。本文利用多时相HJ-1号卫星数据分析人民胜利渠灌区小麦生长期影像特征,研究灌区小麦快速提取方法。研究结果表明,利用灌区小麦越冬前多时相HJ-1号卫星影像NDVI数据进行小麦提取,能够准确获取小麦分布和面积信息,精度达到90%以上。