buffer.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE task SYSTEM "grass-interface.dtd">
<task name="v.buffer">
	<description>
		Creates a buffer around vector features of given type.
	</description>
	<keywords>
		vector, buffer, area, circle, geometry, line, grow, shrink
	</keywords>
	<parameter name="input" type="string" required="yes" multiple="no">
		<label>
			Name of input vector map
		</label>
		<description>
			Or data source for direct OGR access
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="old" element="vector" prompt="vector" />
	</parameter>
	<parameter name="layer" type="string" required="no" multiple="no">
		<label>
			Layer number or name ('-1' for all layers)
		</label>
		<description>
			A single vector map can be connected to multiple database tables. This number determines which table to use. When used with direct OGR access this is the layer name.
		</description>
		<gisprompt age="old" element="layer_all" prompt="layer" />
		<default>
			-1
		</default>
		<guisection>
			Selection
		</guisection>
	</parameter>
	<parameter name="cats" type="string" required="no" multiple="no">
		<label>
			Category values
		</label>
		<description>
			Example: 1,3,7-9,13
		</description>
		<keydesc>
			<item order="1">range</item>
		</keydesc>
		<guisection>
			Selection
		</guisection>
	</parameter>
	<parameter name="where" type="string" required="no" multiple="no">
		<label>
			WHERE conditions of SQL statement without 'where' keyword
		</label>
		<description>
			Example: income &lt; 1000 and inhab &gt;= 10000
		</description>
		<keydesc>
			<item order="1">sql_query</item>
		</keydesc>
		<guisection>
			Selection
		</guisection>
	</parameter>
	<parameter name="type" type="string" required="no" multiple="yes">
		<description>
			Input feature type
		</description>
		<default>
			point,line,area
		</default>
		<values>
			<value>
				<name>point</name>
			</value>
			<value>
				<name>line</name>
			</value>
			<value>
				<name>boundary</name>
			</value>
			<value>
				<name>centroid</name>
			</value>
			<value>
				<name>area</name>
			</value>
		</values>
		<guisection>
			Selection
		</guisection>
	</parameter>
	<parameter name="output" type="string" required="yes" multiple="no">
		<description>
			Name for output vector map
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="new" element="vector" prompt="vector" />
	</parameter>
	<parameter name="distance" type="float" required="no" multiple="no">
		<description>
			Buffer distance along major axis in map units
		</description>
		<guisection>
			Distance
		</guisection>
	</parameter>
	<parameter name="minordistance" type="float" required="no" multiple="no">
		<description>
			Buffer distance along minor axis in map units
		</description>
		<guisection>
			Distance
		</guisection>
	</parameter>
	<parameter name="angle" type="float" required="no" multiple="no">
		<description>
			Angle of major axis in degrees
		</description>
		<default>
			0
		</default>
		<guisection>
			Distance
		</guisection>
	</parameter>
	<parameter name="column" type="string" required="no" multiple="no">
		<description>
			Name of column to use for buffer distances
		</description>
		<keydesc>
			<item order="1">name</item>
		</keydesc>
		<gisprompt age="old" element="dbcolumn" prompt="dbcolumn" />
		<guisection>
			Distance
		</guisection>
	</parameter>
	<parameter name="scale" type="float" required="no" multiple="no">
		<description>
			Scaling factor for attribute column values
		</description>
		<default>
			1.0
		</default>
		<guisection>
			Distance
		</guisection>
	</parameter>
	<parameter name="tolerance" type="float" required="no" multiple="no">
		<description>
			Maximum distance between theoretical arc and polygon segments as multiple of buffer
		</description>
		<default>
			0.01
		</default>
		<guisection>
			Distance
		</guisection>
	</parameter>
	<flag name="s">
		<description>
			Make outside corners straight
		</description>
	</flag>
	<flag name="c">
		<description>
			Do not make caps at the ends of polylines
		</description>
	</flag>
	<flag name="t">
		<description>
			Transfer categories and attributes
		</description>
 		<guisection>
			Attributes
		</guisection>
	</flag>
	<flag name="overwrite">
		<description>
			Allow output files to overwrite existing files
		</description>
	</flag>
	<flag name="help">
		<description>
			Print usage summary
		</description>
	</flag>
	<flag name="verbose">
		<description>
			Verbose module output
		</description>
	</flag>
	<flag name="quiet">
		<description>
			Quiet module output
		</description>
	</flag>
</task>