土地利用宏观监测中国产卫星的变化信息提取方法评估

Evaluation of Methods for Land Use Change Information Extraction in Macroscopic Monitoring with Domestic Satellite Images

选取全国范围内5个地形各异的地区,针对中等分辨率的国产卫星影像中巴资源卫星(CBERS-02B)、环境一号卫星(HJ-1)和北京一号卫星(BJ-1),采用多种土地利用变化信息提取方法,进行了土地利用变化信息提取方法的分析评估。通过实验得出比值法较适用于CBERS-02B数据,大部分地区属性精度和面积精度可达70%以上;差值法较适用于HJ-1和BJ-1数据,属性精度和面积精度也可达70%以上。在实际的宏观监测应用中,可优化各种数据使用模式,组合运用针对各种数据的最佳方法进行变化信息提取。

The evaluation of the land use change information extraction methods（difference and ratio） over five different regions was carried out using three domestic images（CBERS-02B,HJ-1,BJ-1）.The analysis indicated that the difference method is more suitable for CBERS-02B with the accuracy of about 70% for most regions.The ratio method is more suitable for HJ-1 and BJ-1 with the accuracy of about 70% for most regions.We suggested to integrate multiple domestic images and adopt the optimum method for the land use change information extraction in practical application.