Normalized Satellite Indexes
|Index||Name||Definition (pre-Landsat 8)||Landsat 8||Results||Reference|
|NDWI||Normalized Difference Water Index||(TM4-TM5) / (TM4+TM5)||
Water will be white; shows coastlines well.
|NDVI||Normalized Difference Vegetation Index||(TM4-TM3) / (TM4+TM3)||(TM5-TM4) / (TM5+TM4)||Vegetation will be white. Red is 0.63 to 0.69, and NIR is 0.76 to 0.90.|
|NDSI||Normalized Difference SnowIndex||(TM2-TM5) / (TM2+TM5)||(TM2-TM6) / (TM2+TM6)||Dozier, 1989, Remote Sensing Environment|
|NDSI||Normalized Difference Soil Index||(TM5-TM4) / (TM5+TM4)|
|NBR||Normalized Burn Ratio||(TM4-TM7) / (TM7+TM4)|
|VARI||Visible Atmospherically Resistant Index||(green-red)/ (green+red-blue)||Gitelson and others, 2002|
Compute indexes on Imagery analysis menu for satellite imagery (Create new band menu option). These are all ratios, and require two bands, except for the VARI which uses three).
Old: Values are added to 128, rounded, and results clipped to be within the range of 0-255.
Current: values are stored as floating point, multiplied by 100.
Landsat 8 changes the bands substantially. The program will use the correct bands for Landsat 8, as well as World View 2.
Reference for VARI:
Last revision 9/26/2013