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Frequent Contributor
Posts: 96
Registered: ‎01-04-2017
Accepted Solution

Moisture Stress Index

Hi,

 

I am wondring what is "Moisture Stress Index" in ERDAS ?

 

Does it  calculate the defeciency of moisture in plants ? or Calculate Soil moisture ?

 

What does the calculaed index indicates ? Lowest or highest moisture ?

 

If it is soil, does the calculated index indicates indicates the higest moisture or the lowerst moisture ?

 

If the index is classified, what does the classes indicates ? level of moisture increasing or decreasing, the index class being the last class in classification ?

 

I searched Field guide and on net but couldn't get an specific answer.

 

Thanks 

 

RSGIS

Technical Evangelist
Posts: 1,079
Registered: ‎10-01-2015

Re: Moisture Stress Index

@rsgis 

 

The Moisture Stress Index (MSI; Rock et al., 1986) is a spectral reflectance index designed to assess levels of vegetation moisture stress. The MSI is a broad-band ratio which utilises a combination of the moisture-affected SWIR and the, theoretically, unaffected NIR.

 

You should be able to find details online, such as this page:

 

https://giscrack.com/list-of-spectral-indices-for-sentinel-and-landsat/

 

Cheers

 

Ian Anderson
Chief Product Owner, Desktop Remote Sensing
Hexagon Geospatial