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i.tasscap.1grass

Langue: en

Version: 331633 (ubuntu - 24/10/10)

Section: 1 (Commandes utilisateur)

NAME

i.tasscap - Tasseled Cap (Kauth Thomas) transformation for LANDSAT-TM data

KEYWORDS

raster, imagery

SYNOPSIS

i.tasscap
i.tasscap help
i.tasscap [-457] band1=string band2=string band3=string band4=string band5=string band7=string outprefix=string [--overwrite] [--verbose] [--quiet]

Flags:

-4

use transformation rules for LANDSAT-4
-5

use transformation rules for LANDSAT-5
-7

use transformation rules for LANDSAT-7
--overwrite

Allow output files to overwrite existing files
--verbose

Verbose module output
--quiet

Quiet module output

Parameters:

band1=string

raster input map (LANDSAT channel 1)
band2=string

raster input map (LANDSAT channel 2)
band3=string

raster input map (LANDSAT channel 3)
band4=string

raster input map (LANDSAT channel 4)
band5=string

raster input map (LANDSAT channel 5)
band7=string

raster input map (LANDSAT channel 7)
outprefix=string

raster output TC maps prefix

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: 2009-01-24 23:31:57 +0100 (sab, 24 gen 2009) $

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