QGIS GRASS Cookbook - Revision history

Neteler: /* Troubleshooting */

2017-07-06T05:44:58Z

Troubleshooting

← Older revision		Revision as of 05:44, 6 July 2017
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	==== Troubleshooting ====		==== Troubleshooting ====
	** If you ~~get an error~~ message like " GRASS init error: GRASS was not found in '/usr/lib64/grass-7.0.3' (GISBASE), provider and plugin will not work." ~~then edit~~ the settings (Menu Plugins >> GRASS >> GRASS options) and change the path to the correct path.		** Error message like "This algorithm cannot be run :-( GRASS folder is not configured. Please configure it before running GRASS algorithms.":
			*** QGIS searches in the path for grass73, then grass72, then grass70 (in this order). Are you sure that GRASS GIS is installed on your system?
			** Error message like "GRASS init error: GRASS was not found in '/usr/lib64/grass-7.0.3' (GISBASE), provider and plugin will not work.":
			*** Edit the settings (Menu Plugins >> GRASS >> GRASS options) and change the path to the correct path.

	=== Using GRASS 6 Toolbox ===		=== Using GRASS 6 Toolbox ===

Neteler: /* Using GRASS 7 Toolbox */

2016-11-19T17:39:21Z

Using GRASS 7 Toolbox

← Older revision		Revision as of 17:39, 19 November 2016
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	* Menu Plugins >> GRASS >> GRASS options		* Menu Plugins >> GRASS >> GRASS options
	** Change the path to "/usr/lib64/grass-7.0.3" or whatever appropriate (the directory containing the GRASS GIS software)		** Change the path to "/usr/lib64/grass-7.0.3" or whatever appropriate (the directory containing the GRASS GIS software)
	** Troubleshooting: If you get an error message like " GRASS init error: GRASS was not found in '/usr/lib/grass' (GISBASE), provider and plugin will not work." then edit the settings and change the path to "/usr/lib64/grass-7.0.3".

	Visualizing GRASS maps:		Visualizing GRASS maps:
	* Menu View >> Panels >> enable "Browser (2) panel"		* Menu View >> Panels >> enable "Browser (2) panel"
	* In that "Browser (2) panel" >> Home >> go-to-the-grassdata-location-mapset >> pick map with GRASS logo		* In that "Browser (2) panel" >> Home >> go-to-the-grassdata-location-mapset >> pick map with GRASS logo

			==== Troubleshooting ====
			** If you get an error message like " GRASS init error: GRASS was not found in '/usr/lib64/grass-7.0.3' (GISBASE), provider and plugin will not work." then edit the settings (Menu Plugins >> GRASS >> GRASS options) and change the path to the correct path.

	=== Using GRASS 6 Toolbox ===		=== Using GRASS 6 Toolbox ===

Neteler: + Using GRASS 7 Toolbox

2016-03-08T22:18:10Z

+ Using GRASS 7 Toolbox

@@ Line 70: / Line 70: @@
 Go to the menu Plugins -> GRASS -> Open Mapset and open an existing mapset. This enables you to use the GRASS Toolbox if you have write access to that mapset. If not, create a new mapset.
-=== Using GRASS Toolbox ===
+=== Using GRASS 7 Toolbox ===
 '''''Note: The [[GRASS_and_Sextante#SEXTANTE_in_QGIS|new Processing interface with GRASS GIS support]] is much easier to use!'''''

Neteler: /* Using GRASS Toolbox */

2015-08-09T19:58:53Z

Using GRASS Toolbox

← Older revision		Revision as of 19:58, 9 August 2015
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	=== Using GRASS Toolbox ===		=== Using GRASS Toolbox ===

	'''''Note: The [[GRASS_and_Sextante#SEXTANTE_in_QGIS\|new ~~Sextante plugin~~ with GRASS GIS support]] is much ~~earier~~ to use!'''''		'''''Note: The [[GRASS_and_Sextante#SEXTANTE_in_QGIS\|new Processing interface with GRASS GIS support]] is much easier to use!'''''

	* Objective: To learn how to set GRASS region and how to run GRASS modules in QGIS		* Objective: To learn how to set GRASS region and how to run GRASS modules in QGIS

Neteler: /* Setting the database backend connection to SQLite */

2013-10-02T19:09:57Z

Setting the database backend connection to SQLite

← Older revision		Revision as of 19:09, 2 October 2013
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	# These topological problems we can fix now in GRASS via toolbox using the topology tools: Vector -> Develop map -> Toolset for cleaning topology of vector map -> v.clean.break. Define a threshold in map units (for example 0.5 [m] or likewise). Analyse the printed report, probably the threshold needs to be adjusted or a different topology cleanup tool to be used. Click then on view output to show the result as map.		# These topological problems we can fix now in GRASS via toolbox using the topology tools: Vector -> Develop map -> Toolset for cleaning topology of vector map -> v.clean.break. Define a threshold in map units (for example 0.5 [m] or likewise). Analyse the printed report, probably the threshold needs to be adjusted or a different topology cleanup tool to be used. Click then on view output to show the result as map.
	# Export the cleaned map to SHAPE format: File management -> Export from GRASS -> Export vector from GRASS -> v.out.ogr		# Export the cleaned map to SHAPE format: File management -> Export from GRASS -> Export vector from GRASS -> v.out.ogr

			=== Using GRASS via Sextante/Processing in QGIS ===

			See here: [[GRASS_and_Sextante#SEXTANTE_in_QGIS\|new Sextante plugin with GRASS GIS support]] for a much easier to use integration.

	=== Setting the database backend connection to SQLite ===		=== Setting the database backend connection to SQLite ===

Neteler at 19:08, 2 October 2013

2013-10-02T19:08:34Z

← Older revision		Revision as of 19:08, 2 October 2013
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	=== Using GRASS Toolbox ===		=== Using GRASS Toolbox ===

	'''Note: The [[GRASS_and_Sextante#SEXTANTE_in_QGIS\|new Sextante plugin with GRASS GIS support]] is much earier to use!'''		'''''Note: The [[GRASS_and_Sextante#SEXTANTE_in_QGIS\|new Sextante plugin with GRASS GIS support]] is much earier to use!'''''

	* Objective: To learn how to set GRASS region and how to run GRASS modules in QGIS		* Objective: To learn how to set GRASS region and how to run GRASS modules in QGIS

Neteler: point to Sextante plugin

2013-10-02T19:07:53Z

point to Sextante plugin

← Older revision		Revision as of 19:07, 2 October 2013
Line 71:		Line 71:

	=== Using GRASS Toolbox ===		=== Using GRASS Toolbox ===

			'''Note: The [[GRASS_and_Sextante#SEXTANTE_in_QGIS\|new Sextante plugin with GRASS GIS support]] is much earier to use!'''

	* Objective: To learn how to set GRASS region and how to run GRASS modules in QGIS		* Objective: To learn how to set GRASS region and how to run GRASS modules in QGIS

Neteler: mention Sextante plugin

2012-09-01T16:40:13Z

mention Sextante plugin

← Older revision		Revision as of 16:40, 1 September 2012
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	== QGIS GRASS Cookbook ==		== QGIS GRASS Cookbook ==

	The GRASS Cookbook (GCB) is a collection of recipes for typical GIS tasks which can be accomplished with GRASS plugin in [http://www.qgis.org QGIS]. The recipes can be tried in any order but it is recommended to go through the ''Getting started'' section first. Each recipe can be reproduced with publicly available demo dataset. The cookbook presumes that the user has QGIS with GRASS plugin installed (and GRASS plugin enabled in QGIS) and that s/he knows QGIS basics.		The GRASS Cookbook (GCB) is a collection of recipes for typical GIS tasks which can be accomplished with GRASS plugin in [http://www.qgis.org QGIS]. The recipes can be tried in any order but it is recommended to go through the ''Getting started'' section first. Each recipe can be reproduced with publicly available demo dataset. The cookbook presumes that the user has '''QGIS with the GRASS GIS plugin''' installed (and GRASS GIS plugin enabled in QGIS) and that s/he knows QGIS basics.

			''Note: as alternative, there is the [[GRASS_and_Sextante#In_QGIS:_Sextante_plugin_with_GRASS_GIS_support\|Sextante-GRASS GIS support in QGIS]] available since 2012 which offers a simplified integration with respect to the toolbox explained here.''

	[[File:QGIS17_GRASS64.png\|\|350px\|thumb\|center\|GRASS Toolbox in QGIS]]		[[File:QGIS17_GRASS64.png\|\|350px\|thumb\|center\|GRASS Toolbox in QGIS]]

Neteler: +http://qgis.spatialthoughts.com/2012/01/setting-up-working-grass-environment-in.html

2012-03-27T09:28:08Z

+http://qgis.spatialthoughts.com/2012/01/setting-up-working-grass-environment-in.html

← Older revision		Revision as of 09:28, 27 March 2012
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	* [http://wiki.awf.forst.uni-goettingen.de/wiki/index.php/QGIS_tutorial QGIS tutorial with GRASS exercises] (in 12 lectures, 2011)		* [http://wiki.awf.forst.uni-goettingen.de/wiki/index.php/QGIS_tutorial QGIS tutorial with GRASS exercises] (in 12 lectures, 2011)
			* [http://qgis.spatialthoughts.com/2012/01/setting-up-working-grass-environment-in.html Tutorial: Setting Up A Working GRASS Environment in QGIS]
	* [http://www.dur.ac.uk/resources/geography/conferences/3d_modeling/lidar_lab_notes_r_bennett.pdf Using QGIS and GRASS for Processing and Analysing Lidar Data] (Lab, 2010)		* [http://www.dur.ac.uk/resources/geography/conferences/3d_modeling/lidar_lab_notes_r_bennett.pdf Using QGIS and GRASS for Processing and Analysing Lidar Data] (Lab, 2010)
	* [http://blog.qgis.org/node/90 Screencast - Loading Data into GRASS with QGIS] (2007)		* [http://blog.qgis.org/node/90 Screencast - Loading Data into GRASS with QGIS] (2007)

⚠️HamishBowman: /* Further reading and video tutorials */ + adding tools to the toolbox

2011-12-13T02:47:48Z

Further reading and video tutorials: + adding tools to the toolbox

← Older revision		Revision as of 02:47, 13 December 2011
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	* [http://blog.qgis.org/node/90 Screencast - Loading Data into GRASS with QGIS] (2007)		* [http://blog.qgis.org/node/90 Screencast - Loading Data into GRASS with QGIS] (2007)
	* [http://www.youtube.com/results?search_query=using+grass+qgis+tutorial&aq=f QGIS GRASS video tutorials]		* [http://www.youtube.com/results?search_query=using+grass+qgis+tutorial&aq=f QGIS GRASS video tutorials]
			* [http://hub.qgis.org/projects/quantum-gis/wiki/Adding_New_Tools_to_the_GRASS_Toolbox Adding new tools to the GRASS toolbox]


	[[Category: Documentation]]		[[Category: Documentation]]