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Vegetation Index Algorithm for Vegetation Monitoring in an Arid and Semi Arid Land

Research Project

Project/Area Number 09640519
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionCHIBA UNIVERSITY

Principal Investigator

ISHIYAMA Takashi  CENTER FOR ENVIRONMENTAL REMOTE SENSING,CHIBA UNIVERSITY,ASSISTANT, 環境リモートセンシング研究センタ, 助手 (00110289)

Co-Investigator(Kenkyū-buntansha) SHINDO Shizuo  CENTER FOR ENVIRONMENTAL REMOTE SENSING,CHIBA UNIVERSITY,PROFESSOR, 環境リモートセンシング研究センタ, 教授 (70058014)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
KeywordsVegetation Index / NDVI / OPVI / SAVI / Vegetation Coverage / Arid Land / Satellite Date / 衛生データ / 砂漠化 / 人工衛星 / 植生モニタリング / タクラマカン沙漠
Research Abstract

In estimating the vegetation coverage from NDVI (Normalized Vegetation Index) or SAVI (Soil Adjusted Vegetation Index, Huete, 1988) which are calculated from the satellite data, the vegetation density within a pixel affect the results. To eliminate this undesirable effect, an optimum vegetation index (OPVI) is presented. In this method, the vegetation coverage within each pixel is calculated from the reflectance ratio of radiance in band 4 band to that in band 5 of ASTER (TM5 and TM 7, in case of Landsat TM). Then, if the reflectance ratio is larger or smaller than a critical value, select either NDVI or SAVI for calculating the vegetation index in each pixel. For determining the critical value, the relationship between vegetation coverage and the reflectance ratio are studied from the spectral reflectance of plants and soils as a function of ratio of coverage area of plants to that of soils in the laboratory. Then, the critical value is determined by comparing the results obtained by … More NDVI and SAVI.Comparison of results obtained by OPVI method with those by both NDVI and SAVI are made by using the satellite data collected in and around oases in Taklimakan Desert in China since the vegetation is expected to vary over the wide range. Figure shows the false color image and the NDVI, SAVI, and OPVI maps of the object area for this study. Most of the area inside the oasis in the NDVI map shows higher vegetation index than in OPVI.Further, a high vegetation index in the NDVI is shown outside the oasis which has a lower vegetation density. On the other hand, the vegetation index in the SAVI, as a whole, is evaluated to be a low even inside the oasis. Particularly, even in a high vegetation density such as fruit gardens and cotton fields as confirmed by in situ survey, the vegetation obtain from the SAVI is too low.
The results show that OPVI gives a better indicator of actual vegetation cover in an arid area than single NDVI or SAVI alone. Further, OPVI becomes effective to investigate the desertification, which is becoming at issue in many arid and semi-arid areas in the world. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] Ishiyama, T. Y. Nakajima and K. Kajiwara: "Vegetation Index Algorithm for Vegetation Monitoring in Arid and Semi Arid Land" Journal of Arid Land Studies. 6-1. 35-47 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ishiyama, T. Y. Nakajima, K. Kajiwara and K. Tsuchiya: "Extraction of Vegetation Cover in an Arid Area Based on Satellite Data" Advances in Space Research. 19(9). 1375-7378 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ts. Purevdorji, R. Tateishi and T. Ishiyama, Y. Honda: "Estimation of vegetation cover by vegetation indices" International Journal of Remote Sensing. 14(18). 3519-3535 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ishiyama, T., Y.Nakajima and K.Kajiwara: "Vegetation Index Algorithm for Vegetation Monitoring in Arid and Semi Arid Land" Journal of Arid Land Studies. 6-1. 35-47 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ishiyama, T., Y.Nakajima and K.Kajiwara and K.Tsuchiya: "Extraction of Vegetation Cover in an Arid Area based on Satellite Data" Advances in Space Research. 19(9). 1375-1378 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ts. Purevdorji, R.Tateishi and T.Ishiyama and Y.Honda: "Estimation of Vegetation Cover by Vegetation Indices" International Journal of Remote Sensing. 14(18). 3519-3535 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Ishiyama,T,Y.Nakajima and K.Kajiwara: "Vegetation Index Algorithm for Vegetation Monitoring in Arid and Semi Arid Land" Journal of Arid Land Studies. 6-1. 35-47 (1996)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ishiyama,T.,Y.Nakajima and K.Kajiwara and K.Tsuchiya: "Extraction of Vegetation Cover in an Arid Area based on Satellite Data" Advances Space Research. 19(9). 1375-1378 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] Ts.Purevdorji,R.Tateishi and T.Ishiyama,Y.Honda: "Estimation of vegetation cover by vegetation indices" International Journal of Remote Sensing. 14(18). 3519-3535 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Ishiyama、Y.Nakajima and K.Kajiwara: "Vegetation Index Algorithm for Vegetation Monitoring in Arid and Semi Arid Land" Journal of Arid Land Studies. 6-1. 35-47 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Ishiyama、Y.Nakajima、Koji Kajiwara and K.Tsuchiya: "Extraction of Vegetation Cover in an Arid Area based on Satelltie Data" Advances in Space Research,Pergamon Press. 19(9). (8)1375-1378 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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