varNBR2: Calculate the normalized burn ratio 2 (NBR2)

In RGISTools: Handling Multiplatform Satellite Images

Description

varNBR2 computes the NBR2 index from the shortwave infrared 1 (SWIR1) and shortwave infrared 2 (SWIR2).

Usage

varNBR2(swir1, swir2)

Arguments

swir1	a raster with the the SWIR1 band of the capture.
swir2	a raster with the the SWIR2 band of the capture.

Details

The normalized burn ratio 2 (NRB2) is an index to identify burned areas. In contrast to NBR, NRB2 highlights the sensitivity to water in vegetation \insertCitelutes2006firemonRGISTools. This function is used within ls7FolderToVar, ls8FolderToVar, modFolderToVar and senFolderToVar.

Value

A NBR2 image in raster format.

References

\insertRef

lutes2006firemonRGISTools

Examples

# path to the cropped and cutted MODIS images for the region of Navarre
wdir <- system.file("ExNavarreVar", package = "RGISTools")
# list all the tif files
files.mod <- list.files(wdir, pattern="\\.tif$", recursive = TRUE, full.names = TRUE)
# print the MOD09 bands
getRGISToolsOpt("MOD09BANDS")

# select the SWIR1 and SWIR2 bands
img.mod.swir1 <- raster(files.mod[6])
img.mod.swir2 <- raster(files.mod[7])
# calculate the NBR2 image
img.mod.nbr2 <- varNBR2(img.mod.swir1,img.mod.swir2)
# plot the image
spplot(img.mod.nbr2,col.regions=rev(heat.colors(20)))

RGISTools documentation built on July 2, 2020, 3:58 a.m.