基于多尺度NDVI的胶东半岛植被研究

Vegetation Analysis in Jiaodong Peninsula Based on Multi-scale NDVI

在区域植被研究中,将一种基于多尺度NDVI的方法应用于植被生长区提取及盖度评价.首先,建立DEM约束条件,与TM光谱识别相结合提取植被生长区.在植被生长区,基于多日合成、空间重采样的MODIS NDVI产品与像元盖度良好的相关性,将其代入像元二分模型计算各像元盖度.最后,根据植被盖度分级标准对植被生长区盖度进行评价.在位于胶东半岛的研究区内应用该方案,成功提取植被生长区并对植被生长区盖度进行评价.研究结果表明,该方案为区域植被提取及盖度评价提供了一种有效的方法,有助于区域植被调查及生态评估.

A multi-scale NDVI method was proposed for local vegetation growth region extraction and coverage evaluation.First,the vegetation growth region was extracted by DEM constraint and spectral recognition using TM data.Then,using MODIS NDVI products,the coverage of each extracted pixel was calculated with the Dimidiate Pixel Model.At last,the vegetation coverage grading standard was used to evaluate the coverage.In a study area of Jiaodong Peninsula,the proposed method reached good results.The proposed method is useful for local vegetation extraction and coverage evaluation,and is of universal applicability.