نتایج جستجو برای: total ratio vegetation index trvi

تعداد نتایج: 1555903  

2007
Zhangyan Jiang Alfredo R. Huete Jing Li Jiaguo Qi

In red-NIR reflectance space, the Modified Soil Adjusted Vegetation Index (MSAVI) isolines, representing similar vegetation biophysical quantities, are neither convergent to a point nor parallel to each other. Consequently, the treatment of the MSAVI isolines is distinctly different from those of other vegetation index isolines, such as the normalized difference vegetation index (NDVI), the per...

2010
Atiqur Rahman Leonid Roytman Mitch Goldberg Felix Kogan

Relationships between yearly malaria incidence and (1) climate data from weather station and (2) satellite-based vegetation health (VH) indices were investigated for prediction of malaria vector activities in Bangladesh. Correlation analysis of percent of malaria cases with Advanced Very High Resolution Radiometer- (AVHRR-) based VH indices represented by the vegetation condition index (VCI-moi...

Journal: :Remote Sensing 2015
Hui Fan Xiaohua Fu Zheng Zhang Qiong Wu

Accurate and up-to-date mapping and monitoring of rubber plantations is challenging. In this study, we presented a simple method for rapidly and accurately mapping rubber plantations in the Xishuangbanna region of southwest China using phenology-based vegetation index differencing. Temporal profiles of the Normalized Difference Vegetation Index (NDVI), Enhanced Vegetation Index (EVI), Atmospher...

Journal: Money and Economy 2014

This paper presents a framework for assessing the fiscal condition index (FCI) and develops a concept to assess fiscal condition of governments and implements it into Iran government as an oil exporting country. The concept consists of four dimensions ­-revenue, expenditure, budget balance, and debt structure-and each dimension has its own indicators. There are seven indicators examined namely ...

2012
Changbai Mountain Congcong Shen Jinbo Xiong Huayong Zhang Youzhi Feng Xiangui Lin Xinyu Li Wenju Liang Haiyan Chu

The elevational patterns of diversity for plants and animals have been well established over the past century. However, it is unclear whether there is a general elevational distribution pattern for microbes. Changbai Mountain is one of few well conserved natural ecosystems, where the vertical distribution of vegetation is known to mirror the vegetation horizontal zonation from temperate to frig...

2015
Juan Zhang Shukai Fan Xiaoming Du Juncheng Yang Wenyan Wang Hong Hou

Farmland soil and leafy vegetables accumulate more polycyclic aromatic hydrocarbons (PAHs) in suburban sites. In this study, 13 sampling areas were selected from vegetable fields in the outskirts of Xi'an, the largest city in northwestern China. The similarity of PAH composition in soil and vegetation was investigated through principal components analysis and redundancy analysis (RDA), rather t...

Journal: :Remote Sensing 2014
Lennert Schepers Birgen Haest Sander Veraverbeke Toon Spanhove Jeroen Vanden Borre Rudi Goossens

Uncontrolled, large fires are a major threat to the biodiversity of protected heath landscapes. The severity of the fire is an important factor influencing vegetation recovery. We used airborne imaging spectroscopy data from the Airborne Prism Experiment (APEX) sensor to: (1) investigate which spectral regions and spectral indices perform best in discriminating burned from unburned areas; and (...

Journal: :Remote Sensing 2014
Davide Cammarano Glenn J. Fitzgerald Raffaele Casa Bruno Basso

Remotely sensed vegetation indices have been extensively used to quantify plant and soil characteristics. The objectives of this study were to: (i) compare vegetation indices developed at different scales for measuring canopy N content (g∙N∙m −2 ) and concentration (%); and (ii) evaluate the effects of soil background reflectance, cultivar, illumination and atmospheric conditions on the ability...

2015
Gabriella Balacco Benedetto Figorito Eufemia Tarantino Andrea Gioia Vito Iacobellis

The vegetation space-time variability during 1999-2010 in the North of the Apulian region (Southern Italy) was analysed using SPOT VEGETATION (VGT) sensor data. Three bands of VEGETATION (RED, NIR and SWIR) were used to implement the vegetation index named reduced simple ratio (RSR) to derive leaf area index (LAI). The monthly average LAI is an indicator of biomass and canopy cover, while the d...

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