## DESCRIPTION

i.tasscap calculates Tasseled Cap (Kauth Thomas, TC) transformation for LANDSAT-TM data (TM4, TM5, TM7). The following TC components are generated:

- tasscap.1: corresponds to brightness,
- tasscap.2: corresponds to greenness,
- tasscap.3: corresponds to wetness,
- tasscap.4: corresponds to atmospheric haze.

## EXAMPLE

Calculation of TC maps from North Carolina Landsat scene:

    g.region rast=lsat7_2002_10 -p
    i.tasscap -7 band1=lsat7_2002_10 band2=lsat7_2002_20 \
                 band3=lsat7_2002_30 band4=lsat7_2002_40 \
                 band5=lsat7_2002_50 band7=lsat7_2002_70 \
    	     outprefix=tasscap

Results:

'Brightness' Tasseled Cap component 1 | 'Greenness' Tasseled Cap component 2
'Wetness' Tasseled Cap component 3 | 'Atmospheric haze' Tasseled Cap component 4

## REFERENCES

- LANDSAT-4/LANDSAT-5: TC-factor changed to CRIST et al. 1986, Proc. IGARSS 1986, p.1467
- LANDSAT-7: TASSCAP factors cited from: DERIVATION OF A TASSELED CAP TRANSFORMATION BASED ON LANDSAT 7 AT-SATELLITE REFLECTANCE Chengquan Huang, Bruce Wylie, Limin Yang, Collin Homer and Gregory Zylstra Raytheon ITSS, USGS EROS Data Center Sioux Falls, SD 57198, USA http://landcover.usgs.gov/pdf/tasseled.pdf
  This is published as well in INT. J. OF RS, 2002, VOL 23, NO. 8, 1741-1748.
  Compare discussion: http://adis.cesnet.cz/cgi-bin/lwgate/IMAGRS-L/archives/imagrs-l.log0211/date/article-14.html

## AUTHOR

Markus Neteler, ITC-irst

Last changed: $Date: 2011-11-08 01:42:51 -0800 (Tue, 08 Nov 2011) $