Returns a geometry that represents all points whose distance from this geometric entity is less than or equal to a given distance. By default, the distance computation is done using a linear algorithm unless a custom measure is supplied.

Remarks:: This method returns NULL when using a negative offset with points, lines, and curves. When using a negative offset with polygons, the method returns NULL if the offset causes the buffered polygon to shrink to zero area.

.NET Syntax

virtual MgGeometry Buffer(double distance, MgMeasure measure);

Java Syntax

virtual MgGeometry Buffer(double distance, MgMeasure measure);

PHP Syntax

virtual MgGeometry Buffer(double distance, MgMeasure measure);

Parameters:

	distance	(double) The distance from the geometry in units. This value cannot be zero.
	measure	(MgMeasure) The MgMeasure instance to use when computing the buffer. If null, a linear distance algorithm is used.

Returns:: An MgGeometry that represents the geometric entity's buffer, or NULL if the geometry cannot be buffered.

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