QGIS/resources/function_help/convex_hull

<h3>convex_hull function</h3>
Returns the convex hull of a geometry. It represents the minimum convex geometry that encloses all geometries within the set.

<h4>Syntax</h4>
<pre>convex_hull( a, b )</pre>

<h4>Arguments</h4>
a &rarr; geometry
a &rarr; geometry

<h4>Example</h4>
<pre>  geom_to_wkt( convex_hull( geom_from_wkt( 'LINESTRING(3 3 , 4 4 , 4 10)' )) )   &rarr; returns POLYGON((3 3,4 10,4 4,3 3)) </pre>
Add alias support for expression functions Standardise naming of all internal functions to lowercase with underscore convention. Add aliases for old names to avoid breakage. 2015-05-03 18:40:09 +10:00			`<h3>convex_hull function</h3>`
added new help files for geometry functions 2013-09-15 16:18:02 +02:00			`Returns the convex hull of a geometry. It represents the minimum convex geometry that encloses all geometries within the set.`

			`<h4>Syntax</h4>`
Add alias support for expression functions Standardise naming of all internal functions to lowercase with underscore convention. Add aliases for old names to avoid breakage. 2015-05-03 18:40:09 +10:00			`<pre>convex_hull( a, b )</pre>`
added new help files for geometry functions 2013-09-15 16:18:02 +02:00
			`<h4>Arguments</h4>`
german translation update and some function help fixes 2013-09-15 19:21:51 +02:00			`a → geometry`
			`a → geometry`
added new help files for geometry functions 2013-09-15 16:18:02 +02:00
			`<h4>Example</h4>`
Add alias support for expression functions Standardise naming of all internal functions to lowercase with underscore convention. Add aliases for old names to avoid breakage. 2015-05-03 18:40:09 +10:00			`<pre> geom_to_wkt( convex_hull( geom_from_wkt( 'LINESTRING(3 3 , 4 4 , 4 10)' )) ) → returns POLYGON((3 3,4 10,4 4,3 3)) </pre>`