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SAVI (Soil Adjusted Vegetation Index) Image of 1990 Landsat Thematic Mapper Image
Identifier:76_1
Publication date:2001
Author(s):
William Stefanov
Abstract:
Normalized difference vegetation index (NDVI) produced from the 1990 Landsat Thematic Mapper(TM) image. NDVI is a means of monitoring density and vigour of green vegetation growth using the spectral reflectivity of solar radiation.
Keywords:
VEGETATION, ndvi, Phoenix, Arizona, Sonoran Desert, caplter, Central Arizona Phoenix Longterm Ecological Research, urban, metropolitan area, Landsat TM, Land-Use and Land-Cover Change, Project id 20, caplter created, Database Remote Sensing GIS Applications, Land Use Changes, gis, remote sensing, Primary Production
Temporal Coverage:
1990-05-01
Geographic Coverage:
Geographic Description:Central Arizona Phoenix LTER Study area
Bounding Coordinates:
Longitude:-112.788161 to -111.573726
Latitude:33.838178 to 33.18652
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: TM3737_5_90_ndvi
download
Attributes:
Attribute:Value
Description:Index of vegetation density
Measurement Unit:dimensionless
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