Tool Soil Texture Classification

Derive soil texture classes from sand, silt and clay contents. Currently supported schemes are USDA and German Kartieranleitung 5.

References

USDA NRCS Soils Website

Author: Gianluca Massei (c) 2007 (g_massa@libero.it), L.Landschreiber, O.Conrad (c) 2017
Menu: Grid|Analysis|Soil Analysis

Parameters

	Name	Type	Identifier	Description	Constraints
Input	Sand (*)	Grid (optional input)	`SAND`	sand content given as percentage	-
	Silt (*)	Grid (optional input)	`SILT`	silt content given as percentage	-
	Clay (*)	Grid (optional input)	`CLAY`	clay content given as percentage	-
Output	Soil Texture	Grid (output)	`TEXTURE`	soil texture	-
	Sum (*)	Grid (optional output)	`SUM`	Sum of percentages	-
	Scheme as Polygons (*)	Shapes (optional output)	`POLYGONS`	-	-
Options	Grid system	Grid system	`PARAMETERS_GRID_SYSTEM`	-	-
	Classification	Choice	`SCHEME`	-	Available Choices: [0] USDA [1] Germany KA5 [2] Belgium/France [3] user defined Default: 0
	Default Colour Scheme	Choice	`COLORS`	-	Available Choices: [0] Scheme 1 [1] Scheme 2 [2] Scheme 3 Default: 0
	User Definition	Static table	`USER`	The colour is defined as comma separated red, green and blue values (in the range 0 to 255). If the colour field is empty it will be generated from the chosen default colour scheme. Key and name are simple text labels specifying each class. The polygon is defined as pairs of sand (=x) and clay (=y) separated by a blank and separated from the next pair by a comma.	4 Fields: - 1. [string] COLOR - 2. [string] KEY - 3. [string] NAME - 4. [string] POLYGON
	X/Y Axes	Choice	`XY_AXES`	-	Available Choices: [0] Sand and Clay [1] Sand and Silt [2] Silt and Sand [3] Silt and Clay [4] Clay and Sand [5] Clay and Silt Default: 3
	Triangle	Choice	`TRIANGLE`	-	Available Choices: [0] right-angled [1] isosceles Default: 1
(*) optional

Command-line

Usage: saga_cmd grid_analysis 14 [-SAND <str>] [-SILT <str>] [-CLAY <str>] [-TEXTURE <str>] [-SUM <str>] [-SCHEME <str>] [-COLORS <str>] [-USER <str>] [-POLYGONS <str>] [-XY_AXES <str>] [-TRIANGLE <str>]
  -SAND:<str>    	Sand
	Grid (optional input)
  -SILT:<str>    	Silt
	Grid (optional input)
  -CLAY:<str>    	Clay
	Grid (optional input)
  -TEXTURE:<str> 	Soil Texture
	Grid (output)
  -SUM:<str>     	Sum
	Grid (optional output)
  -SCHEME:<str>  	Classification
	Choice
	Available Choices:
	[0] USDA
	[1] Germany KA5
	[2] Belgium/France
	[3] user defined
	Default: 0
  -COLORS:<str>  	Default Colour Scheme
	Choice
	Available Choices:
	[0] Scheme 1
	[1] Scheme 2
	[2] Scheme 3
	Default: 0
  -USER:<str>    	User Definition
	Static table
	4 Fields:
	- 1. [string] COLOR
	- 2. [string] KEY
	- 3. [string] NAME
	- 4. [string] POLYGON
	
  -POLYGONS:<str>	Scheme as Polygons
	Shapes (optional output)
  -XY_AXES:<str> 	X/Y Axes
	Choice
	Available Choices:
	[0] Sand and Clay
	[1] Sand and Silt
	[2] Silt and Sand
	[3] Silt and Clay
	[4] Clay and Sand
	[5] Clay and Silt
	Default: 3
  -TRIANGLE:<str>	Triangle
	Choice
	Available Choices:
	[0] right-angled
	[1] isosceles
	Default: 1