GRASS 6 Tutorial/Raster data management - Revision history

⚠️Madi at 09:47, 9 August 2013

2013-08-09T09:47:18Z

← Older revision		Revision as of 09:47, 9 August 2013
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	''Note - that when you run r.in.gdal, the full extent of the map is imported''		''Note - that when you run r.in.gdal, the full extent of the map is imported''




			[[Category: Tutorial]]

⚠️Dmci: /* Overview */

2013-07-26T10:18:21Z

Overview

← Older revision		Revision as of 10:18, 26 July 2013
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	==Raster data management==		==Raster data management==
	~~===Overview===~~

	This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012. The aim is to present the reader with introductory information on handling raster data within GRASS GIS.

	===Data Import===		===Data Import===
	In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.		In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.

⚠️Dmci: /* Data Import */

2013-04-26T12:53:53Z

Data Import

← Older revision		Revision as of 12:53, 26 April 2013
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	[[File:Grass raster import.png\|400px]]		[[File:Grass raster import.png\|400px]]



			Sometimes, you need to define the region of the Mapset to the extent of your raster. For instance, using the above-mentioned example, you would simply:

			g.region rast=elev_input_state500m

	A common issue that users are faced with is how to import several GeoTiffs? Obviously the above steps can be repeated using the GUI or copy-pasting the command line or more simply using the following BASH for loop:		A common issue that users are faced with is how to import several GeoTiffs? Obviously the above steps can be repeated using the GUI or copy-pasting the command line or more simply using the following BASH for loop:
Line 19:		Line 25:
	r.in.gdal input=$file output=${file%.tif}		r.in.gdal input=$file output=${file%.tif}
	done		done


			''Note - that when you run r.in.gdal, the full extent of the map is imported''

⚠️Dmci: /* Data Import */

2013-04-25T16:00:23Z

Data Import

← Older revision		Revision as of 16:00, 25 April 2013
Line 7:		Line 7:
	In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.		In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.

	A Geotiff can be imported into GRASS using the command line or the GUI		A Geotiff can be imported into GRASS using the command line (input represents the full or relative path to the raster file you want to import; output is its raster name in GRASS). The same can be achieved using the GUI.

			r.in.gdal input=elev_input_state500m.tif output=elev_input_state500m

	[[File:Grass raster import.png\|400px]]		[[File:Grass raster import.png\|400px]]

			A common issue that users are faced with is how to import several GeoTiffs? Obviously the above steps can be repeated using the GUI or copy-pasting the command line or more simply using the following BASH for loop:

			for file in `ls *.tif`
			do
			r.in.gdal input=$file output=${file%.tif}
			done

⚠️Dmci: /* Overview */

2013-04-25T15:52:54Z

Overview

← Older revision		Revision as of 15:52, 25 April 2013
Line 2:		Line 2:
	===Overview===		===Overview===

	This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012.		This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012. The aim is to present the reader with introductory information on handling raster data within GRASS GIS.

			===Data Import===
	In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.		In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.

			A Geotiff can be imported into GRASS using the command line or the GUI

			[[File:Grass raster import.png\|400px]]

⚠️Dmci at 15:46, 25 April 2013

2013-04-25T15:46:40Z

← Older revision		Revision as of 15:46, 25 April 2013
Line 4:		Line 4:
	This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012.		This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012.

	In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, ''<code>r.in.</code>'' and ~~'''~~<code>r.out.</code>~~'''~~ and specifically, ''<code>r.in.gdal</code>'' and ~~'''~~<code>r.out.gdal</code>~~'''~~ are used. The module ''<code>r.extenal</code>'' can be used in lieu of importing a raster into GRASS.		In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, <code>r.in.</code> and <code>r.out.</code> and specifically, <code>r.in.gdal</code> and <code>r.out.gdal</code> are used. The module <code>r.extenal</code> can be used in lieu of importing a raster into GRASS.

⚠️Dmci at 14:27, 25 April 2013

2013-04-25T14:27:07Z

← Older revision		Revision as of 14:27, 25 April 2013
Line 4:		Line 4:
	This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012.		This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012.

	In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules		In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules, ''<code>r.in.</code>'' and '''<code>r.out.</code>''' and specifically, ''<code>r.in.gdal</code>'' and '''<code>r.out.gdal</code>''' are used. The module ''<code>r.extenal</code>'' can be used in lieu of importing a raster into GRASS.

⚠️Dmci: Created page with "==Raster data management== ===Overview=== This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with o..."

2013-04-25T14:22:58Z

Created page with "==Raster data management== ===Overview=== This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with o..."

New page

==Raster data management==
===Overview===

This section of the tutorial is intended to provide new users with an introduction to raster data management in GRASS GIS. As with other parts of the GRASS 6 tutorial, the examples are largely based on the GRASS 5.7 tutorial as well as the GRASS GIS presentation at Geostat-2012.

In a similar way to the vector data management, the import and export of raster data is underpinned by GDAL. As such, the modules