Tool Topographic Correction

Topographic correction for satellite imagery's bands using a Digital Elevation Model to estimate and remove the shading effect for the given position of the Sun at acquisition time.

References

Civco, D. L. (1989): Topographic Normalization of Landsat Thematic Mapper Digital Imagery. Photogrammetric Engineering and Remote Sensing, 55(9), pp.1303-1309.
Law, K.H., Nichol, J. (2004): Topographic Correction for Differential Illumination Effects on Ikonos Satellite Imagery. ISPRS 2004 International Society for Photogrammetry and Remote Sensing. http://www.cartesia.org/geodoc/isprs2004/comm3/papers/347.pdf.
Phua, M.-H., Saito, H. (2003): Estimation of biomass of a mountainous tropical forest using Landsat TM data. Canadian Journal of Remote Sensing, 29(4), pp.429-440.
Riano, D., Chuvieco, E. Salas, J., Aguado, I. (2003): Assessment of Different Topographic Corrections in Landsat-TM Data for Mapping Vegetation Types. IEEE Transactions on Geoscience and Remote Sensing, 41(5), pp.1056-1061. http://www.geogra.uah.es/~emilio/pdf/Riano2003b.pdf.
Teillet, P.M., Guindon, B., Goodenough, D.G. (1982): On the slope-aspect correction of multispectral scanner data. Canadian Journal of Remote Sensing, 8(2), pp.1537-1540.

Author: O.Conrad (c) 2008
Menu: Terrain Analysis|Lighting

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Elevation	Grid, input	`DEM`	-	-
Input	Original Image	Grid, input	`ORIGINAL`	-	-
Output	Corrected Image	Grid, output	`CORRECTED`	-	-
Options	Grid System	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Grid system	Grid system	`DEM_GRIDSYSTEM`	-	-
	Azimuth	Floating point	`AZI`	direction of sun (degree, clockwise from North)	Minimum: 0.000000 Maximum: 360.000000 Default: 180.000000
	Height	Floating point	`HGT`	height of sun above horizon (degree)	Minimum: 0.000000 Maximum: 90.000000 Default: 45.000000
	Method	Choice	`METHOD`	-	Available Choices: [0] Cosine Correction (Teillet et al. 1982) [1] Cosine Correction (Civco 1989) [2] Minnaert Correction [3] Minnaert Correction with Slope (Riano et al. 2003) [4] Minnaert Correction with Slope (Law & Nichol 2004) [5] C Correction [6] Normalization (after Civco, modified by Law & Nichol) Default: 4
	Minnaert Correction	Floating point	`MINNAERT`	-	Minimum: 0.000000 Maximum: 1.000000 Default: 0.500000
	Maximum Cells (C Correction Analysis)	Integer	`MAXCELLS`	Maximum number of grid cells used for trend analysis as required by C correction.	Minimum: 10 Default: 1000
	Value Range	Choice	`MAXVALUE`	-	Available Choices: [0] 1 byte (0-255) [1] 2 byte (0-65535) Default: 0

Command-line

Usage: saga_cmd ta_lighting 4 [-DEM <str>] [-ORIGINAL <str>] [-CORRECTED <str>] [-AZI <double>] [-HGT <double>] [-METHOD <str>] [-MINNAERT <double>] [-MAXCELLS <num>] [-MAXVALUE <str>]
  -DEM:<str>        	Elevation
	Grid, input
  -ORIGINAL:<str>   	Original Image
	Grid, input
  -CORRECTED:<str>  	Corrected Image
	Grid, output
  -AZI:<double>     	Azimuth
	Floating point
	Minimum: 0.000000
	Maximum: 360.000000
	Default: 180.000000
  -HGT:<double>     	Height
	Floating point
	Minimum: 0.000000
	Maximum: 90.000000
	Default: 45.000000
  -METHOD:<str>     	Method
	Choice
	Available Choices:
	[0] Cosine Correction (Teillet et al. 1982)
	[1] Cosine Correction (Civco 1989)
	[2] Minnaert Correction
	[3] Minnaert Correction with Slope (Riano et al. 2003)
	[4] Minnaert Correction with Slope (Law & Nichol 2004)
	[5] C Correction
	[6] Normalization (after Civco, modified by Law & Nichol)
	Default: 4
  -MINNAERT:<double>	Minnaert Correction
	Floating point
	Minimum: 0.000000
	Maximum: 1.000000
	Default: 0.500000
  -MAXCELLS:<num>   	Maximum Cells (C Correction Analysis)
	Integer
	Minimum: 10
	Default: 1000
  -MAXVALUE:<str>   	Value Range
	Choice
	Available Choices:
	[0] 1 byte (0-255)
	[1] 2 byte (0-65535)
	Default: 0