Geomorphometry - Revision history

Neteler: /* Geomorphometry in GRASS */

2023-02-21T20:26:23Z

Geomorphometry in GRASS

← Older revision		Revision as of 20:26, 21 February 2023
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	An usual workflow in Geomorphometry is broken in three main sections: input, analysis and output (Hengl and Evans, 2009). Input operations refer to the import of altitude data or DEMs, or to DEM generation. Analysis operations refer to the preprocessing of DEMs for extraction of geomorphometric variables and geomorphometric objects. Output operations refer to the use of geomorphometric data for various applications.		An usual workflow in Geomorphometry is broken in three main sections: input, analysis and output (Hengl and Evans, 2009). Input operations refer to the import of altitude data or DEMs, or to DEM generation. Analysis operations refer to the preprocessing of DEMs for extraction of geomorphometric variables and geomorphometric objects. Output operations refer to the use of geomorphometric data for various applications.

			(see also: [[Terrain analysis]] and [[Hydrological Sciences]])

	=== Import of DEMs ===		=== Import of DEMs ===

Neteler at 19:48, 21 February 2023

2023-02-21T19:48:49Z

← Older revision		Revision as of 19:48, 21 February 2023
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	=== Import of DEMs ===		=== Import of DEMs ===

	* Grid-based DEMs in various formats can be imported using the {{cmd\|r.in.gdal}} command.		* Grid-based DEMs in various formats can be imported using the {{cmd\|r.import}} (and {{cmd\|r.in.gdal}}) command.

	=== Import of elevation data ===		=== Import of elevation data ===

Neteler: +:Category: Terrain

2023-02-21T19:37:56Z

+Category: Terrain

← Older revision		Revision as of 19:37, 21 February 2023
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	[[Category: Applications]]		[[Category: Applications]]
			[[Category: Terrain]]

Neteler: r.geomorphon is in GRASS-core

2021-03-16T22:04:22Z

r.geomorphon is in GRASS-core

← Older revision		Revision as of 22:04, 16 March 2021
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	=== Deriving geomorphometric variables ===		=== Deriving geomorphometric variables ===

	* {{cmd\|r.param.scale}}: Use the param=feature option		* {{cmd\|r.geomorphon}}: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
			* ({{cmd\|r.param.scale}}: Use the param=feature option)
	* {{cmd\|r.watershed}}: Determines watersheds		* {{cmd\|r.watershed}}: Determines watersheds
	* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map		* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map
	* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)		* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)

	* '''{{AddonCmd\|r.geomorphon}}''' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
	* {{AddonCmd\|r.basin}} addon module: morphometric characterization of river basins		* {{AddonCmd\|r.basin}} addon module: morphometric characterization of river basins
	* {{AddonCmd\|r.valley.bottom}} addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index		* {{AddonCmd\|r.valley.bottom}} addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index

⚠️HamishBowman: /* Deriving geomorphometric variables */

2020-11-13T04:52:28Z

Deriving geomorphometric variables

← Older revision		Revision as of 04:52, 13 November 2020
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	* {{cmd\|r.param.scale}}: Use the param=feature option		* {{cmd\|r.param.scale}}: Use the param=feature option
	* ''r.geomorphon'' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
	* {{cmd\|r.watershed}}: Determines watersheds		* {{cmd\|r.watershed}}: Determines watersheds
	* ''r.basin'' addon module: morphometric characterization of river basins
	* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map		* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map
	* ''r.valley.bottom'' addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index
	* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)		* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)

			* '''{{AddonCmd\|r.geomorphon}}''' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
			* {{AddonCmd\|r.basin}} addon module: morphometric characterization of river basins
			* {{AddonCmd\|r.valley.bottom}} addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index

	=== Deriving objects variables ===		=== Deriving objects variables ===

⚠️HamishBowman: /* Deriving geomorphometric variables */

2020-11-13T04:48:43Z

Deriving geomorphometric variables

← Older revision		Revision as of 04:48, 13 November 2020
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	* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map		* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map
	* ''r.valley.bottom'' addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index		* ''r.valley.bottom'' addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index
			* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)

	=== Deriving objects variables ===		=== Deriving objects variables ===

⚠️HamishBowman: /* Deriving geomorphometric variables */ +

2020-11-13T04:47:45Z

Deriving geomorphometric variables: +

← Older revision		Revision as of 04:47, 13 November 2020
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	=== Deriving geomorphometric variables ===		=== Deriving geomorphometric variables ===

			* {{cmd\|r.param.scale}}: Use the param=feature option
			* ''r.geomorphon'' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
			* {{cmd\|r.watershed}}: Determines watersheds
	* ''r.basin'' addon module: morphometric characterization of river basins		* ''r.basin'' addon module: morphometric characterization of river basins
	* {{cmd\|r.~~param~~.~~scale~~}}: ~~Use the param=feature option~~		* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map
			* ''r.valley.bottom'' addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index

	=== Deriving objects variables ===		=== Deriving objects variables ===

⚠️HamishBowman: /* Deriving geomorphometric variables */

2020-11-13T04:41:13Z

Deriving geomorphometric variables

← Older revision		Revision as of 04:41, 13 November 2020
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	=== Deriving geomorphometric variables ===		=== Deriving geomorphometric variables ===

	* ~~{{cmd\|~~r.basin}}		* ''r.basin'' addon module: morphometric characterization of river basins
	* {{cmd\|r.param.scale}}: Use the param=feature option		* {{cmd\|r.param.scale}}: Use the param=feature option

⚠️HamishBowman: /* Deriving geomorphometric variables */

2020-11-13T04:40:09Z

Deriving geomorphometric variables

← Older revision		Revision as of 04:40, 13 November 2020
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	=== Deriving geomorphometric variables ===		=== Deriving geomorphometric variables ===

			* {{cmd\|r.basin}}
			* {{cmd\|r.param.scale}}: Use the param=feature option

	=== Deriving objects variables ===		=== Deriving objects variables ===

⚠️Mihai.niculita: /* Geomorphometry in GRASS */

2013-06-20T18:46:10Z

Geomorphometry in GRASS

← Older revision		Revision as of 18:46, 20 June 2013
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	Geomorphometry is viewed as the science of quantitative analysis of earth surface shape (Pike, 2000).		Geomorphometry is viewed as the science of quantitative analysis of earth surface shape (Pike, 2000).

	An usual workflow in Geomorphometry is broken in three main sections: input, analysis and output (Hengl and Evans, 2009). Input operations refer to the import of altitude data or DEMs, or to DEM generation. Analysis operations refer to the preprocessing of DEMs for extraction of geomorphometric variables and geomorphometric objects. Output operations refer to the use of geomorphometric data for various ~~applcations~~.		An usual workflow in Geomorphometry is broken in three main sections: input, analysis and output (Hengl and Evans, 2009). Input operations refer to the import of altitude data or DEMs, or to DEM generation. Analysis operations refer to the preprocessing of DEMs for extraction of geomorphometric variables and geomorphometric objects. Output operations refer to the use of geomorphometric data for various applications.

	=== Import of DEMs ===		=== Import of DEMs ===

	* Grid-based DEMs in various formats can be imported using the {{cmd\|r.in.gdal}} command		* Grid-based DEMs in various formats can be imported using the {{cmd\|r.in.gdal}} command.

	=== Import of elevation data ===		=== Import of elevation data ===
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	=== Generation of DEMs ===		=== Generation of DEMs ===

	* Elevation data used in DEM generation represent an sampling of elevations from a certain surface.		* Elevation data used in DEM generation represent an sampling of elevations from a certain surface. This discrete data need to be transformed into a continuous representation by using interpolators.
			* Interpolation of DEMs from elevation data functions can be called from Raster / Interpolate Surfaces

	=== Preprocessing of DEMs ===		=== Preprocessing of DEMs ===

← Older revision		Revision as of 22:04, 16 March 2021
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	=== Deriving geomorphometric variables ===		=== Deriving geomorphometric variables ===

	* {{cmd\|r.param.scale}}: Use the param=feature option		* {{cmd\|r.geomorphon}}: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
			* ({{cmd\|r.param.scale}}: Use the param=feature option)
	* {{cmd\|r.watershed}}: Determines watersheds		* {{cmd\|r.watershed}}: Determines watersheds
	* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map		* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map
	* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)		* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)

	* '''{{AddonCmd\|r.geomorphon}}''' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
	* {{AddonCmd\|r.basin}} addon module: morphometric characterization of river basins		* {{AddonCmd\|r.basin}} addon module: morphometric characterization of river basins
	* {{AddonCmd\|r.valley.bottom}} addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index		* {{AddonCmd\|r.valley.bottom}} addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index

← Older revision		Revision as of 04:52, 13 November 2020
Line 27:		Line 27:

	* {{cmd\|r.param.scale}}: Use the param=feature option		* {{cmd\|r.param.scale}}: Use the param=feature option
	* ''r.geomorphon'' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
	* {{cmd\|r.watershed}}: Determines watersheds		* {{cmd\|r.watershed}}: Determines watersheds
	* ''r.basin'' addon module: morphometric characterization of river basins
	* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map		* {{cmd\|r.basin.fill}}: Generates watershed subbasins raster map
	* ''r.valley.bottom'' addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index
	* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)		* {{cmd\|r.flow}}: Computes flow-lines, flow-path lengths, and flow-accumulation (contributing areas)

			* '''{{AddonCmd\|r.geomorphon}}''' addon module: Calculates geomorphons (terrain forms) and associated geometry using machine vision approach
			* {{AddonCmd\|r.basin}} addon module: morphometric characterization of river basins
			* {{AddonCmd\|r.valley.bottom}} addon module: Calculation of Multi-resolution Valley Bottom Flatness (MrVBF) index

	=== Deriving objects variables ===		=== Deriving objects variables ===