A SIMPLIFIED PROCEDURE FOR A LARGE SCALE LAI INVERSION FROM HIGH RESOLUTION SATELLITE DATA

被引:1
作者
Gonsamo, Alemu [1 ]
Pellikka, Petri [1 ]
机构
[1] Univ Helsinki, Dept Geog, FIN-00014 Helsinki, Finland
来源
2009 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM, VOLS 1-5 | 2009年
关键词
High resolution satellite data; Large scale LAI inversion; Vegetation index; Scale effect; LEAF-AREA INDEX;
D O I
10.1109/IGARSS.2009.5417816
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
This study is aimed at demonstrating the feasibility of the large scale LAI inversion algorithms using red and near-infrared reflectance obtained from high resolution satellite imagery. The algorithms are developed based on the principle commonly used for ground-based optical determination of LAI by assuming that high resolution remote sensing imagery is capable to distinguish shadows/gaps from canopy Gap fraction was obtained from scaled difference of Normalized difference Vegetation Index (NDVI), Scaled Difference Vegetation Index (SDVI), and Modified Soil-Adjusted Vegetation Index (MSAVI) from SPOT 10 m pixel Imagery. The sensitivity of the methodology was evaluated for spatial resolution effects, effectiveness test with ground-based measurement, simulated spectral data and MODIS LAI product. The approaches resulted in reasonably good accuracy.
引用
收藏
页码:1859 / 1862
页数:4
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