NDMI | How to Calculate Normalized Difference Moisture Index in ArcGIS

NDMI is used to determine vegetation water content. It is calculated as a ratio between the NIR and SWIR values.
Formula for NDMI, NDMI= (NIR - SWIR) / (NIR + SWIR)
In Landsat 8, NDMI = (Band 5 – Band 6) / (Band 5 + Band 6)
In Landsat 4-7, NDMI = (Band 4 – Band 5) / (Band 4 + Band 5)

Steps to be Followed:

Step 1: Download Landsat Satellite Image, Here I’ll calculate NDMI using Landsat 8 Satellite Image. Download Satellite Image:
   • How to Download Satellite Image Lands...  

Step 2: Open ArcMap and Add Image (Band 5 and Band 6)

Step 3: Go to Arc Toolbox -=Spatial Analyst Tools --Map Algebra -- Raster Calculator

Step 4: Then Just do according to Formula (Band 5-Band 6) / (Band 5+ Band 6) (Example, Float (“Band 5-Band 6”) / Float (“Band 5 +Band 6”) and Rename, Then Specify the folder where you want to save and Click okay.

Step 5: NDMI is done. Now you can show the moisture content in color using Symbology option. Just follow me.

Step 6: You can Extract your Study area from the Image. Extract Study Area/AOI from Satellite Image    • How to Cut/Extract Study Area/AOI fro...  

Check my Videos for How to calculate NDVI, NDWI, NDBI.

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Related Tags: Soil moisture Index, how to calculate moisture index in gis, how to calculate vegetation water content, Normalized Difference Moisture Index , how to calculate NDMI, NDMI in Arcgis, NDVI, NDWI, NDBI

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