PolygonGeometry.BufferZone Method
Returns a buffer zone for the PolygonGeometry.
Thread safety: This method is not thread-safe. Show
BufferZone(System.Double distance, System.Int32 arcAccuracy)
Returns a buffer zone for the PolygonGeometry.Syntax
public MultiPolygonGeometry BufferZone (
System.Double distance,
System.Int32 arcAccuracy
)Parameters
distance
Type: System.Double
The distance between the polygon boundary and the buffer zone boundary. This value can be negative. Unit: same as the coordinates of the polygon geometry.
The distance between the polygon boundary and the buffer zone boundary. This value can be negative. Unit: same as the coordinates of the polygon geometry.
arcAccuracy
Type: System.Int32
Specifies the arc accuracy, as the number of straight line segments that would be used for a full 360 degree arc. The number must be at least 2.
Specifies the arc accuracy, as the number of straight line segments that would be used for a full 360 degree arc. The number must be at least 2.
Return Value
Type: MultiPolygonGeometry
The buffer zone around the line or a null reference if the buffer zone could not be generated with the specified values.
The buffer zone around the line or a null reference if the buffer zone could not be generated with the specified values.
Remarks
If distance is negative, the buffer zone will be smaller than the original polygon; in other words, the buffer zone will then cover all points inside the original polygon that are at least -distance from the polygon boundary. Note that this may result in zero, one or more polygons.
Note
This method operates on 2D geometries and all z-coordinate values are ignored.
Platforms
Windows, Linux, Android