"terralook" estimate of a natural-colour
view.
"plot"(x, band, which = 1, decimate = TRUE, zlim, utm = FALSE, col = oce.colorsPalette, drawPalette = TRUE, showBandName = TRUE, alpha.f = 1, red.f = 1.7, green.f = 1.5, blue.f = 6, offset = c(0, -0.05, -0.2, 0), transform = diag(c(red.f, green.f, blue.f, alpha.f)), debug = getOption("oceDebug"), ...)landsat object, e.g. as read by read.landsat."aerosol", "blue", "green", "red",
"nir", "swir1", "swir2", "panchromatic",
"cirrus", "tirs1", or "tirs2". For Landsat-7 data,
this may be one of "blue", "green", "red",
"nir", "swir1", "tirs1", "tirs2",
"swir2", or "panchromatic". For Landsat data prior to
Landsat-7, this may be one of "blue", "green",
"red", "nir", "swir1", "tirs1",
"tirs2", or "swir2". If band is not given, the
("tirs1") will be used if it exists in the object data, or
otherwise the first band will be used. In addition to the above, using
band="temperature" will plot an estimate of at-satellite
brightness temperature, computed from the tirs1 band, and
band="terralook" will plot a sort of natural colour by combining
the red, green, blue and nir bands
according to the formula provided at
https://lta.cr.usgs.gov/terralook/what_is_terralookimagep for image plots.
The default yields faster plotting. Some decimation is sensible for
full-size images, since no graphical displays can show 16 thousand pixels
on a side."histogram" to have a flattened histogram (i.e. to maximally
increase contrast throughout the domain.) If not given, the 1 and 99
percent quantiles are calculated and used as limits."natural", which combines the information in the red,
green and blue bands and produces a natural-hue image. In
the latter case, the band designation is ignored, and the object must
contain the three colour bands.imagep for details.col="natural", to adjust colours
with adjustcolor.col="natural", to adjust colours with
adjustcolor. Higher values of red.f cause red hues
to be emphasized (e.g. dry land).col="natural", to adjust colours with
adjustcolor. Higher values of green.f emphasize
green hues (e.g. forests).band="terralook", to adjust colours with
adjustcolor. Higher values of blue.f emphasize blue
hues (e.g. ocean).band="terralook", to adjust colours with
adjustcolor.band="terralook", to adjust colours
with adjustcolor.band may be
one of: "aerosol", "blue", "green", "red",
"nir", "swir1", "swir2", "panchromatic",
"cirrus", "tirs1", or "tirs2".For Landsat-7 data, band may be one of "blue", "green", "red",
"nir", "swir1", "tirs1", "tirs2",
"swir2", or "panchromatic".
For Landsat data prior to
Landsat-7, band may be one of "blue", "green",
"red", "nir", "swir1", "tirs1",
"tirs2", or "swir2".
If band is not given, the
("tirs1") will be used if it exists in the object data, or
otherwise the first band will be used.
In addition to the above there are also some pseudo-bands that can be plotted, as follows.
band="temperature" will plot an estimate
of at-satellite brightness temperature, computed from the
tirs1 band.
band="terralook" will plot a sort of natural
colour by combining the red, green, blue and
nir bands according to the formula provided at
https://lta.cr.usgs.gov/terralook/what_is_terralook, namely
that the red-band data are provided as the red
argument of the rgb function, while
the green argument is computed as
2/3 of the green-band data plus 1/3 of the nir-band data, and
the blue argument is computed as 2/3 of the green-band
data minus 1/3 of the nir-band data. (This is not a typo: the
blue band is not used.)
landsat data: [[,landsat-method,
landsat-class, landsatAdd,
landsatTrim, landsat,
read.landsat,
summary,landsat-method