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resource center
resource center
Title:Experimental Calibrated Global Vegetation Index from AVHRR, 1985-1991
Source:NOAA/NESDIS National Geophysical Data Center325 Broadway Boulder, Colorado 80303 303-497-6125
Description:The experimental Global Vegetation Index (EGVI) data contained on this CD-ROM was developed by Kevin Gallo of the Land Sciences Branch, Office of Research and Applications, NOAA/NESDIS to investigate the benefits of using pre-launch calibration information to improve the usefulness of the GVI. In addition, screening the data for low sun angle and clouds makes the data more useful for some studies (though the use of such masked data in spatial analysis should be conducted with care).There are two versions of the EGVI data available. One is Kevin Gallo's original biweekly EGVIs in a Mercator map projection. The other is monthly maxima derived from the biweekly data and registered to a 10-minute latitude/longitude grid. This latter format should be easier to work with. In particular, it can easily be used in the GRASS GIS or ISDRISI software for a PC. |
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