landsat-class.read.landsat(file, band = "all", emissivity = 0.984,
debug = getOption("oceDebug"))emissivity in the metadata slot of the
resultant object. This is used in the
calculation of surface temperature, as explained in the discussion of
accessor functions for landsat-class, with the conventional Oce
slots metadata, data and processingLog. The
metadata is mainly intended for use by Oce functions, but for generality
it also contains an entry named header that represents the full image
header in a list (with names made lower-case). The data slot holds
matrices of the data in the requested bands, and users may add extra matrices
if desired, e.g. to store calculated quantities.landsat-class). In R, many operations involving
copying data, so that dealing with full-scale landsat images can overwhelm
computers with storage under 8GB. For this reason, it is typical to read just
the bands that are of interest. It is also helpful to use
landsatTrim to trim the data to a geographical range.read.landsat to work.
Landsat data are provided in directories that contain TIFF files and header
information, and read.landsat relies on a strict convention for the
names of the files in those directories. Those file names were found by
inspection of some data, on the assumption that similar patterns will hold for
other datasets for any given satellite. This is a brittle approach and it
should be born in mind if read.landsat fails for a given dataset.
For Landsat 8, there are 11 bands, with names "aerosol" (band 1),
"blue" (band 2), "green" (band 3), "red" (band 4),
"nir" (band 5), "swir1" (band 6), "swir2" (band 7),
"panchromatic" (band 8), "cirrus" (band 9), "tirs1" (band
10), and "tirs2" (band 11).For Landsat 7, there 8 bands, with names "blue" (band 1), "green"
(band 2), "red" (band 3), "nir" (band 4), "swir1" (band
5), "tir1" (band 6A), "tir2" (band 6B), "swir2" (band 7)
and "panchromatic" (band 8).
For Landsat 4 and 5, the bands similar to Landsat 7 but without
"panchromatic" (band 8).
landsat-class for more information on landsat objects,
especially band information. Use landsatTrim to trim Landsat
objects geographically and landsatAdd to add new ``bands.'' The
accessor operator ([[) is used to access band information, full or
decimated, and to access certain derived quantities. A sample dataset named
landsat is provided by the Other functions dealing with satellite data: [[,landsat-method,
amsr-class, g1sst-class,
landsatAdd, landsatTrim,
plot,amsr-method,
plot,landsat-method,
plot,satellite-method,
read.amsr, read.g1sst,
satellite-class,
summary,amsr-method,
summary,landsat-method,
summary,satellite-method