摘要
以在农作物遥感估产中的应用为例,介绍了运用GVG(GIS&VIDEO&GPS)野外采样系统,检验遥感图像解译精度的方法。即在遥感影像解译过程中,利用GVG系统实地采样图像数据实时检验不确定图斑解译的结果;在遥感影像解译完成后,利用GVG采样统计结果及其缓冲区(Buffer)抽样方式检验遥感图像解译精度。在武汉市新洲估产样区进行的试验表明,该方法简便易行,为提高与检验遥感图像解译精度提供了新的方法和思路。
At present, there are various methods to verify the result of remotely sensed images interpretation. Generally, we can summarize these verifying methods into two sorts, i.e. the field sample verification and the sample verification compared with exiting special maps. The two sorts of methods show two common characteristics. To begin with, the verifying processes are usually carried out after interpreting remotely sensed images. Secondly, the sample verification methods in point or area way are often dominant, while the linear sample methods are seldom seen. To resolve the problems of the two sorts, the article takes the application of crop yield estimation as an example to make a cut-and-try study of verifying the accuracy of remotely sensed image interpretation, based on GVG field sample system. Concretely, in the course of remotely sensed image interpretation, using the pictures which have been sampled by GVG system verifies the interpreted result in good time. After completing interpreting the image, both the statistical sample result and the buffers of GVG sample system have been applied to check the accuracy of the image interpretation with the linear sample methods. The experimentation of the ratio estimation of both rice and dry land area, which has been carried out in the sample field of XinZhou County, WuHan City, proves the feasibility and applicability of the method. Apparently , the method provides a new view and approach for verifying and improving the accuracy of remotely sensed image interpretation.
出处
《遥感技术与应用》
CSCD
2004年第3期149-153,共5页
Remote Sensing Technology and Application
基金
中国科学院知识创新项目"全球农作物遥感估产研究(KZCX2-313-03-04)"。
关键词
遥感图像解译
GVG采样系统
适时检验
缓冲区抽样检验
农作物估产
Remotely sensed image interpretation, GVG sample system, Verify in good time, Buffer sample verifying, Crop yield estimation
