calc_ndmi: Calculate Normalized Difference Moisture Index (NDMI)
In GeoIndexR: Computation of Spectral and Geospatial Indices from Multispectral Raster Data
calc_ndmi R Documentation
Calculate Normalized Difference Moisture Index (NDMI)
Description
Computes the Normalized Difference Moisture Index (NDMI) to assess vegetation canopy liquid water content.
Usage
calc_ndmi(nir, swir1)
Arguments
nir
Near-infrared band (terra::SpatRaster or numeric).
swir1
Short-wave infrared 1 band (terra::SpatRaster or numeric).
Details
NDMI = \frac{NIR - SWIR1}{NIR + SWIR1}
Value
A terra::SpatRaster (named "NDMI") or numeric vector with index values.
References
Gao, B. C. (1996). NDWI—A normalized difference water index for remote sensing of
vegetation liquid water from space. Remote Sensing of Environment, 58(3), 257-266.
See Also
calc_msi, geo_index
Examples
calc_ndmi(nir = 0.7, swir1 = 0.3)
GeoIndexR documentation built on Oct. 10, 2026, 5:08 p.m.
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| calc_ndmi | R Documentation |
Calculate Normalized Difference Moisture Index (NDMI)
Description
Computes the Normalized Difference Moisture Index (NDMI) to assess vegetation canopy liquid water content.
Usage
calc_ndmi(nir, swir1)
Arguments
nir |
Near-infrared band ( |
swir1 |
Short-wave infrared 1 band ( |
Details
NDMI = \frac{NIR - SWIR1}{NIR + SWIR1}
Value
A terra::SpatRaster (named "NDMI") or numeric vector with index values.
References
Gao, B. C. (1996). NDWI—A normalized difference water index for remote sensing of vegetation liquid water from space. Remote Sensing of Environment, 58(3), 257-266.
See Also
calc_msi, geo_index
Examples
calc_ndmi(nir = 0.7, swir1 = 0.3)
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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