RGISTools (version 1.0.2)

varNBR2: Calculate the normalized burn ratio 2 (NBR2)

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.

Value

A NBR2 image in raster format.

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 lutes2006firemonRGISTools. This function is used within ls7FolderToVar, ls8FolderToVar, modFolderToVar and senFolderToVar.

References

lutes2006firemonRGISTools

Examples

# NOT RUN {
# 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)))
# }