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i.tasscap(1grass) | Grass User's Manual | i.tasscap(1grass) |
NAME¶
i.tasscap - Tasseled Cap (Kauth Thomas) transformation for LANDSAT-TM dataKEYWORDS¶
raster, imagerySYNOPSIS¶
i.tasscapFlags:¶
- -4
-
- -5
-
- -7
-
- --overwrite
-
- --verbose
-
- --quiet
-
Parameters:¶
- band1=string
-
- band2=string
-
- band3=string
-
- band4=string
-
- band5=string
-
- band7=string
-
- outprefix=string
-
DESCRIPTION¶
i.tasscap calculates Tasseled Cap (Kauth Thomas, TC) transformation for LANDSAT-TM data (TM4, TM5, TM7). The tasseled cap transformation is effectively a compression method to reduce multiple spectral data into a few bands. The method was originally developed for understanding important phenomena of crop development in spectral space (Kauth and Thomas 1976). Tasseled cap coefficients for Landsat 7 ETM+ at-satellite reflectance (C. Huang et al., 2001), the conversion can be achieved with i.landsat.toar. 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:band3=lsat7_2002_30 band4=lsat7_2002_40 \
band5=lsat7_2002_50 band7=lsat7_2002_70 \
REFERENCES¶
- LANDSAT-4/LANDSAT-5: TC-factor changed to CRIST et al. 1986, Proc. IGARSS 1986, p.1467
- Crist, E. P., 1985, A TM tasseled cap equivalent transformation for reflectance factor data, Remote Sensing of Environment, 17: 301-306.
- 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
SEE ALSO¶
i.landsat.toarAUTHOR¶
Markus Neteler, ITC-irst Last changed: $Date: 2013-11-07 07:12:33 +0100 (Thu, 07 Nov 2013) $ Full index © 2003-2014 GRASS Development TeamGRASS 6.4.4 |