EnglishFrenchSpanish

OnWorks favicon

i.landsat.accagrass - Online in the Cloud

Run i.landsat.accagrass in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command i.landsat.accagrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


i.landsat.acca - Performs Landsat TM/ETM+ Automatic Cloud Cover Assessment (ACCA).

KEYWORDS


imagery, Landsat, ACCA, cloud detection

SYNOPSIS


i.landsat.acca
i.landsat.acca --help
i.landsat.acca [-5fx2s] input=basename output=name [b56composite=float]
[b45ratio=float] [histogram=integer] [--overwrite] [--help] [--verbose] [--quiet]
[--ui]

Flags:
-5
Data is Landsat-5 TM
I.e. Thermal band is ’.6’ not ’.61’)

-f
Apply post-processing filter to remove small holes

-x
Always use cloud signature (step 14)

-2
Bypass second-pass processing, and merge warm (not ambiguous) and cold clouds

-s
Include a category for cloud shadows

--overwrite
Allow output files to overwrite existing files

--help
Print usage summary

--verbose
Verbose module output

--quiet
Quiet module output

--ui
Force launching GUI dialog

Parameters:
input=basename [required]
Base name of input raster bands
Example: ’B.’ for B.1, B.2, ...

output=name [required]
Name for output raster map

b56composite=float
B56composite (step 6)
Default: 225.

b45ratio=float
B45ratio: Desert detection (step 10)
Default: 1.

histogram=integer
Number of classes in the cloud temperature histogram
Default: 100

DESCRIPTION


i.landsat.acca implements the Automated Cloud-Cover Assessment (ACCA) Algorithm from Irish
(2000) with the constant values for pass filter one from Irish et al. (2006). To do this,
it needs Landsat band numbers 2, 3, 4, 5, and 6 (or band 61 for Landsat-7 ETM+) which have
already been processed from DN into reflectance and band-6 temperature with
i.landsat.toar).

The ACCA algorithm gives good results over most of the planet with the exception of ice
sheets because ACCA operates on the premise that clouds are colder than the land surface
they cover. The algorithm was designed for Landsat-7 ETM+ but because reflectance is used
it is also useful for Landsat-4/5 TM.

NOTES


i.landsat.acca works in the current region settings.

EXAMPLES


Run the standard ACCA algorithm with filling of small cloud holes (the -f flag): With
per-band reflectance raster maps named 226_62.toar.1, 226_62.toar.2, [...] and LANDSAT-7
thermal band 226_62.toar.61, outputting to a new raster map named 226_62.acca:
i.landsat.toar sensor=7 gain=HHHLHLHHL date=2003-04-07 \
product_date=2008-11-27 band_prefix=226_62 solar_elevation=49.51654
i.landsat.acca -f band_prefix=226_62.toar output=226_62.acca

REFERENCES


1 Irish R.R., Barker J.L., Goward S.N., and Arvidson T., 2006. Characterization of
the Landsat-7 ETM+ Automated Cloud-Cover Assessment (ACCA) Algorithm.
Photogrammetric Engineering and Remote Sensing vol. 72(10): 1179-1188.

2 Irish, R.R., 2000. Landsat 7 Automatic Cloud Cover Assessment. In S.S. Shen and
M.R. Descour (Eds.): Algorithms for Multispectral, Hyperspectral, and Ultraspectral
Imagery VI. Proceedings of SPIE, 4049: 348-355.

Use i.landsat.accagrass online using onworks.net services


Free Servers & Workstations

Download Windows & Linux apps

  • 1
    Amidst
    Amidst
    Amidst or Advanced Minecraft Interface
    and Data/Structure Tracking is a tool to
    display an overview of a Minecraft
    world, without actually creating it. It
    can ...
    Download Amidst
  • 2
    MSYS2
    MSYS2
    MSYS2 is a collection of tools and
    libraries providing you with an
    easy-to-use environment for building,
    installing and running native Windows
    software. It con...
    Download MSYS2
  • 3
    libjpeg-turbo
    libjpeg-turbo
    libjpeg-turbo is a JPEG image codec
    that uses SIMD instructions (MMX, SSE2,
    NEON, AltiVec) to accelerate baseline
    JPEG compression and decompression on
    x86, x8...
    Download libjpeg-turbo
  • 4
    Xtreme Download Manager
    Xtreme Download Manager
    The project has a new home now:
    https://xtremedownloadmanager.com/ For
    developers:
    https://github.com/subhra74/xdm Xtreme
    Download Manager is a powerful tool t...
    Download Xtreme Download Manager
  • 5
    TTGO VGA32 Lite
    TTGO VGA32 Lite
    Features:4:3 and 16:9 low resolution
    VGA outputPS/2 keyboard and mouse
    inputText-based user interface (TUI)
    with dialog managerPartial Unicode
    supportSlave dis...
    Download TTGO VGA32 Lite
  • 6
    Clover EFI bootloader
    Clover EFI bootloader
    Project has moved to
    https://github.com/CloverHackyColor/CloverBootloader..
    Features:Boot macOS, Windows, and Linux
    in UEFI or legacy mode on Mac or PC with
    UE...
    Download Clover EFI bootloader
  • More »

Linux commands

Ad