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SAVI (Soil Adjusted Vegetation Index) of the 2005 Landsat Thematic Mapper Image
Identifier:370_1
Publication date:2007
Author(s):
Alexander Buyantuyev
Abstract:
Soil Adjusted Vegetation Index (SAVI) produced from the 2005 Landsat Thematic Mapper(ETM) image. SAVI is a means of monitoring density and vigour of green vegetation growth using the spectral reflectivity of solar radiation. It is computed as follows:( (NIR-RED) / (NIR+RED+L))*(1+L), where NIR (Near Infra-Red) is the TM band 4 (0.76-0.9 micrometers), RED is band 3 (0.78-0.82 micrometers), and L is the correction factor whose values range from 0 (high vegetation cover) to 1 (low vegetation). L=0.5 was used. The index has been designed to correct for high soil reflectance in arid regions.
Keywords:
SONORAN DESERT, PHOENIX, urban, remote sensing, caplter, Central Arizona Phoenix Longterm Ecological Research, metropolitan area, Arizona, SAVI, Project id 20, Landsat TM, caplter created, Soil Adjusted Vegetation Index, Land-Use and Land-Cover Change, Land Use Changes, Database Remote Sensing GIS Applications, gis, Primary Production
Temporal Coverage:
2005-03-08
Geographic Coverage:
Geographic Description:Central Arizona Phoenix
Bounding Coordinates:
Longitude:-112.783663 to -111.569359
Latitude:33.850661 to 33.194677
Contact:
Data Manager, Global Institute of Sustainability,
Arizona State University,PO Box 875401,Tempe
caplter.data@asu.edu
Methods used in producing this dataset:
SAVI computation
The raw Landsat image was clipped to CAPLTER, georeferenced to NAD27 datum and UTM zone 12 coordinate system. Additional preprocessing include atmospheric correction and radiometric calibration. The model of the following form is then applied: ( (NIR-RED) / (NIR+RED+L))*(1+L), where NIR (Near Infra-Red) is the TM band 4 (0.76-0.9 micrometers), RED is band 3 (0.78-0.82 micrometers), and L is the correction factor whose values range from 0 (high vegetation cover) to 1 (low vegetation). L=0.5 was used. The range of possible values is -1.4 to +1.4
Entities:
Raster: savi_landsat_mar2005
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Attributes:
Attribute:Value
Description:SAVI value
Measurement Unit:number
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