Tool Automated Cloud Cover Assessment

Automated Cloud-Cover Assessment (ACCA) for Landsat TM/ETM+ imagery as proposed by Irish (2000). This tool incorporates E.J. Tizado's GRASS GIS implementation (i.landsat.acca).

References

Irish, R.R. (2000): Landsat 7 Automatic Cloud Cover Assessment. In: Shen, S.S., Descour, M.R. [Eds.]: Algorithms for Multispectral, Hyperspectral, and Ultraspectral Imagery VI. Proceedings of SPIE, 4049: 348-355. http://landsathandbook.gsfc.nasa.gov/pdfs/ACCA_Special_Issue_Final.pdf.
Irish, R.R., Barker, J.L., Goward, S.N., 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. https://pdfs.semanticscholar.org/3d20/f685ce83a82b294f0773768624d4166d105d.pdf.
GRASS i.landsat.acca

Author: B.Bechtel, O.Conrad (c) 2013
Menu: Imagery|Landsat

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Green	Grid (input)	`BAND2`	Landsat band 2 reflectance	-
	Red	Grid (input)	`BAND3`	Landsat band 3 reflectance	-
	NIR	Grid (input)	`BAND4`	Landsat band 4 reflectance	-
	SWIR	Grid (input)	`BAND5`	Landsat band 5 reflectance	-
	Thermal	Grid (input)	`BAND6`	Landsat band 6 temperature [Kelvin]	-
Output	Cloud Cover	Grid (output)	`CLOUD`	-	-
Options	Grid System	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Grid system	Grid system	`BAND6_GRIDSYSTEM`	-	-
	Apply post-processing filter to remove small holes	Boolean	`FILTER`	-	Default: 1
	B56 Composite (step 6)	Floating point	`B56C`	-	Default: 225.000000
	B45 Ratio: Desert detection (step 10)	Floating point	`B45R`	-	Default: 1.000000
	Always use cloud signature (step 14)	Boolean	`CSIG`	-	Default: 1
	Bypass second-pass processing, and merge warm (not ambiguous) and cold clouds	Boolean	`PASS2`	-	Default: 1
	Include a category for cloud shadows	Boolean	`SHADOW`	-	Default: 1

Command-line

Usage: saga_cmd imagery_tools 9 [-BAND2 <str>] [-BAND3 <str>] [-BAND4 <str>] [-BAND5 <str>] [-BAND6 <str>] [-CLOUD <str>] [-FILTER <str>] [-B56C <double>] [-B45R <double>] [-CSIG <str>] [-PASS2 <str>] [-SHADOW <str>]
  -BAND2:<str>  	Green
	Grid (input)
  -BAND3:<str>  	Red
	Grid (input)
  -BAND4:<str>  	NIR
	Grid (input)
  -BAND5:<str>  	SWIR
	Grid (input)
  -BAND6:<str>  	Thermal
	Grid (input)
  -CLOUD:<str>  	Cloud Cover
	Grid (output)
  -FILTER:<str> 	Apply post-processing filter to remove small holes
	Boolean
	Default: 1
  -B56C:<double>	B56 Composite (step 6)
	Floating point
	Default: 225.000000
  -B45R:<double>	B45 Ratio: Desert detection (step 10)
	Floating point
	Default: 1.000000
  -CSIG:<str>   	Always use cloud signature (step 14)
	Boolean
	Default: 1
  -PASS2:<str>  	Bypass second-pass processing, and merge warm (not ambiguous) and cold clouds
	Boolean
	Default: 1
  -SHADOW:<str> 	Include a category for cloud shadows
	Boolean
	Default: 1