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Calculates brightness, greenness and wetness from multispectral imagery. Currently implemented Landsat 4 TM, Landsat 5 TM, Landsat 7ETM+, Landsat 8 OLI, MODIS, QuickBird, Spot5 and RapidEye.


tasseledCap(img, sat, ...)



SpatRaster. Input image. Band order must correspond to sensor specifications (see Details and Examples)


Character. Sensor; one of: c("Landsat4TM", "Landsat5TM", "Landsat7ETM", "Landsat8OLI", "MODIS", "QuickBird", "Spot5", "RapidEye"). Case is irrelevant.


Further arguments passed to writeRaster.


Returns a SpatRaster with the thee bands: brigthness, greenness, and (soil) wetness.


Currently implemented: Landsat 4 TM, Landsat 5 TM, Landsat 7ETM+, Landsat 8 OLI, MODIS, QuickBird, Spot5, RapdiEye. Input data must be in top of atmosphere reflectance. Moreover, bands must be provided in ascending order as listed in the table below. Irrelevant bands, such as Landsat Thermal Bands or QuickBird/Spot5 Panchromatic Bands must be omitted. Required bands are:

satbandscoefficientsdata unit
Landsat4TM1,2,3,4,5,7Crist 1985reflectance
Landsat5TM1,2,3,4,5,7Crist 1985reflectance
Landsat7ETM1,2,3,4,5,7Huang 2002reflectance
Landsat8OLI2,3,4,5,6,7Baig 2014reflectance
MODIS1,2,3,4,5,6,7Lobser 2007reflectance
QuickBird2,3,4,5Yarbrough 2005reflectance
Spot52,3,4,5Ivtis 2008reflectance
RapidEye1,2,3,4,5Schoenert 2014reflectance


Crist (1985) "A TM Tasseled Cap Equivalent Transformation for Reflectance Factor Data." Remote Sensing of Environment 17 (3): 301-306

Huang et al. (2002) "Derivation of a Tasselled Cap Transformation Based on Landsat 7 At-Satellite Reflectance." International Journal of Remote Sensing 23 (8): 1741-1748

Baig et al. (2014) "Derivation of a Tasselled Cap Transformation Based on Landsat 8 At-Satellite Reflectance." Remote Sensing Letters 5 (5): 423-431.

Lobser et al. (2007) "MODIS Tasselled Cap: Land Cover Characteristics Expressed through Transformed MODIS Data." International Journal of Remote Sensing 28 (22): 5079-5101.

Yarbrough et al. (2005) "QuickBird 2 tasseled cap transform coefficients: a comparison of derivation methods." Pecora 16 Global Priorities in Land Remote Sensing: 23-27.

Ivits et al. (2008) "Orthogonal transformation of segmented SPOT5 images." Photogrammetric Engineering & Remote Sensing 74 (11): 1351-1364.

Schoenert et al. (2014) "Derivation of tasseled cap coefficients for RapidEye data." Earth Resources and Environmental Remote Sensing/GIS Applications V (9245): 92450Qs.



## Run tasseled cap (exclude thermal band 6)
lsat_tc <- tasseledCap(lsat[[c(1:5,7)]], sat = "Landsat5TM")
#> class       : SpatRaster 
#> dimensions  : 310, 287, 3  (nrow, ncol, nlyr)
#> resolution  : 30, 30  (x, y)
#> extent      : 619395, 628005, -419505, -410205  (xmin, xmax, ymin, ymax)
#> coord. ref. : +proj=utm +zone=22 +ellps=WGS84 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs 
#> source(s)   : memory
#> names       : brightness, greenness,  wetness 
#> min values  :    33.0776,  -21.2454,  10.9682 
#> max values  :   254.0931,   69.6422, 122.4285