杜英坤,燕琴,童李霞,王晓波

• 1:山东农业大学
• 2:国家测绘地理信息局
• 3:山东科技大学
• 4:青海省基础地理信息中心

摘要(Abstract)：

针对利用像元二分模型估算植被覆盖度的精度不高的问题,该文基于OSAVI,提出了选定模型参数(OSAVIs和OSAVIv)的方法,并将该方法应用于青海省植被覆盖度估算。该方法通过高分辨率影像在研究区内选取纯裸地和纯植被样点,并将纯裸地样点的OSAVI作为纯裸地样点像元的OSAVIs,将纯植被样点的OSAVI作为纯植被样点像元的OSAVIv,利用样点像元的OSAVIs和OSAVIv值,通过普通克里金内插法,求得研究区每个像元对应的OSAVIs和OSAVIv。经精度验证结果表明:此方法较常规的参数选取方法,RMSE由0.170降至0.156,MAE由0.137降至0.124。经进一步分析表明,此方法对边缘验证点和非边缘验证点的估算精度都有所提高,由于配准误差和周围地表漫反射的影响,边缘验证点的估算精度低于对非边缘验证点的估算精度。

关键词(KeyWords)： 植被覆盖度;像元二分模型;克里金内插;光谱混合分析

Abstract:

Keywords:

基金项目(Foundation): 中国测绘科学研究院基本科研业务项目(7771512)

作者(Author): 杜英坤,燕琴,童李霞,王晓波

DOI: 10.16251/j.cnki.1009-2307.2016.09.017

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