GRASS 6 Tutorial/Vector data management - Revision history

Neteler: +figure explaining layers

2014-03-24T21:41:24Z

+figure explaining layers

← Older revision		Revision as of 21:41, 24 March 2014
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	Database Schema		Database Schema

			[[File:Catsnlayers.png\|800px\|thumb\|alt=cats and layers in GRASS GIS\|center\|Figure 1 from [[Vector Database Management]]]]


	[[Category: Tutorial]]		[[Category: Tutorial]]

2013-08-09T09:44:06Z

← Older revision		Revision as of 09:44, 9 August 2013
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	management; Managing the default settings; Examples;		management; Managing the default settings; Examples;
	Database Schema		Database Schema




			[[Category: Tutorial]]

2013-07-30T08:15:47Z

Grass Six Tutorial Default Settings

← Older revision		Revision as of 08:15, 30 July 2013
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	Introductory information on [http://grass.ibiblio.org/grass63/manuals/html63_user/vectorintro.html vector data processing] is available from the help manual.		Introductory information on [http://grass.ibiblio.org/grass63/manuals/html63_user/vectorintro.html vector data processing] is available from the help manual.

	~~===[[Grass Six Tutorial Default Settings]]===~~
	~~- Default settings for vector geometry;~~
	~~for vector attributes; for db.* modules~~

	===[[Grass Six Tutorial Attribute Management]]===		===[[Grass Six Tutorial Attribute Management]]===

2013-07-30T08:14:28Z

Grass Six Tutorial Geometry Management

← Older revision		Revision as of 08:14, 30 July 2013
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	- Default settings for vector geometry;		- Default settings for vector geometry;
	for vector attributes; for db.* modules		for vector attributes; for db.* modules

	~~===[[Grass Six Tutorial Geometry Management]]===~~
	~~http://grass.osgeo.org/grass57/tutorial/geom_storage.html~~
	~~- General notes on Geometry~~
	~~management; Managing the default settings;~~
	~~GRASS vector architecture; Geometry stored in native format;~~
	~~Geometry stored in SHAPE file;~~
	~~Import/export of vector data Geometry;~~
	~~Generating vector geometry from various sources~~

	===[[Grass Six Tutorial Attribute Management]]===		===[[Grass Six Tutorial Attribute Management]]===

2013-07-30T08:11:39Z

Import an XY/XYZ ASCII file

← Older revision		Revision as of 08:11, 30 July 2013
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	cat coords.txt \| v.in.ascii -z out=points		cat coords.txt \| v.in.ascii -z out=points

			====Import an XY table from a DBMS or Spreadsheet====

			If you have a list of coordinates (x,y) with associated attributes stored in a spreadsheet table (DBF, CSV, Excel, etc). It's fairly easy to generate a map from them using <code>v.in.db</code>. In the following example, we import the table, meteostations that has the columns 'east', 'north', 'quota' (z) and some attribute columns.

			v.in.db driver=pg database="host=myserver.itc.it,dbname=mydb,user=name" table=meteostations x=east y=north z=quota key=id output=meteostations

			This command creates the new vector map (native format) with attributes table in a DBF file.

			We can display these points in a display monitor and query them as follows:

			d.mon start=x0
			d.vect meteostations
			d.what.vect

	====Importing a DXF file====		====Importing a DXF file====

2013-07-26T10:21:23Z

Overview

@@ Line 1: / Line 1: @@
 ==Vector data management==
 ===Importing Vector data===
 The GRASS modules ''<code>v.in.*</code>'' and '''<code>v.out.*</code>''' handle the importing and exporting of Vector datasets.

2012-11-27T16:13:44Z

Import an XY/XYZ ASCII file

← Older revision		Revision as of 16:13, 27 November 2012
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	v.category in=points out=points_final op=add		v.category in=points out=points_final op=add
	v.category points_final op=report		v.category points_final op=report

			You can then add a new attribute table to the vector file using <code>v.db.addtable</code>
			v.db.addtable map=points

	You can replicate the above procedure for three dimensional data (XYZ), by modifying the <code>v.in.ascii</code> argument list		You can replicate the above procedure for three dimensional data (XYZ), by modifying the <code>v.in.ascii</code> argument list
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	cat coords.txt \| v.in.ascii -z out=points		cat coords.txt \| v.in.ascii -z out=points


	====Importing a DXF file====		====Importing a DXF file====

2012-11-23T14:27:02Z

Importing Vector data

← Older revision		Revision as of 14:27, 23 November 2012
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	===Importing Vector data===		===Importing Vector data===
	The GRASS modules <code>v.in.</code> and <code>v.out.</code> handle the importing and exporting of Vector datasets.		The GRASS modules ''<code>v.in.</code>'' and '''<code>v.out.</code>''' handle the importing and exporting of Vector datasets.
	<code>v.in.ogr</code> is widely used and has simplified the import of vector data; [http://www.gdal.org/ogr/ogr_formats.html OGR] itself support a wide range of formats.		<code>v.in.ogr</code> is widely used and has simplified the import of vector data; [http://www.gdal.org/ogr/ogr_formats.html OGR] itself support a wide range of formats.
	<code>v.out.ogr</code> always exports the entire vector map		<code>v.out.ogr</code> always exports the entire vector map

2012-11-23T14:25:40Z

Importing a DXF file

← Older revision		Revision as of 14:25, 23 November 2012
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	This can also be done using the GUI interface		This can also be done using the GUI interface
	[[File:import_dxf.png\|400px~~\|left~~]]
			[[File:import_dxf.png\|400px]]

	And then visualised within the map display		And then visualised within the map display
	[[File:dxf_display.png\|400px~~\|right~~]]
			[[File:dxf_display.png\|400px]]

	===Exporting Vector data===		===Exporting Vector data===

2012-11-23T14:19:07Z

Importing a DXF file

← Older revision		Revision as of 14:19, 23 November 2012
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	This can also be done using the GUI interface		This can also be done using the GUI interface
	[[File:import_dxf.png\|400px]]		[[File:import_dxf.png\|400px\|left]]

	And then visualised within the map display		And then visualised within the map display
	[[File:dxf_display.png\|400px]]		[[File:dxf_display.png\|400px\|right]]

	===Exporting Vector data===		===Exporting Vector data===