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NDVI (Normalized difference vegetation index) Image of 2000 Enhanced Landsat Thematic Mapper Image
Identifier:236_1
Publication date:2004
Author(s):
William Stefanov
Abstract:
Normalized difference vegetation index (NDVI) produced from the 2000 Enhanced Landsat Thematic Mapper(ETM) image. NDVI 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), where NIR (Near Infra-Red) is the ETM band 4 (0.76-0.9 micrometers) and RED is band 3 (0.78-0.82 micrometers).
Keywords:
SONORAN DESERT, PHOENIX, urban, remote sensing, ndvi, caplter, Project id 20, Central Arizona Phoenix Longterm Ecological Research, metropolitan area, Arizona, Normalized Difference Vegetation Index, Landsat ETM, caplter created, Land-Use and Land-Cover Change, Database Remote Sensing GIS Applications, Land Use Changes, gis, Primary Production
Temporal Coverage:
2000-05-21
Geographic Coverage:
Geographic Description:Central Arizona Phoenix
Bounding Coordinates:
Longitude:-112.776642 to -111.569326
Latitude:33.851503 to 33.202291
Contact:
Data Manager, Arizona State University,
Global Institute of Sustainability,POB 875401,TEMPE
caplter.data@asu.edu
Methods used in producing this dataset:
NDVI 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), where NIR (Near Infra-Red) is the ETM band 4 (0.76-0.9 micrometers) and RED is band 3 (0.78-0.82 micrometers). The range of possible values is -1 to +1.
Rescaling NDVI values
The values computed in the first step are rescaled to the range of values from 0 to 1using Erdas Imagine rescale utility.
Entities:
Raster: ETM_5_21_00_ndvi
download
Attributes:
Attribute:Histogram
Description:Total number of pixels of each particular value
Measurement Unit:number
Attribute:Value
Description:Rescaled NDVI value
Measurement Unit:number
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