Method Offset

Offset(Geometry, Double, OffsetType, Double, Double)

Returns offset version of the input geometry.

Declaration

public static Geometry Offset(this Geometry geometry, double distance, OffsetType offsetType, double bevelRatio, double flattenError)

Parameters

Type	Name	Description
Geometry	geometry	The geometry to calculate offset for. MapPoint and Multipoint are not supported.
System.Double	distance	The offset distance for the geometry.
OffsetType	offsetType	The offset type of the offset geometry.
System.Double	bevelRatio	The ratio used to produce a bevel join instead of a miter join (used only when joins is miter)
System.Double	flattenError	The maximum distance of the resulting segments compared to the true circular arc (used only when joins is round). If flattenError is 0, tolerance value is used. Also, the algorithm never produces more than around 180 vertices for each round join.

Returns

Type	Description
Geometry	The result of the offset operation.

Remarks

The offset operation creates a geometry that is a constant distance from an input polyline or polygon. It is similar to buffering, but produces a one sided result. If distance is greater than 0, then the offset geometry is constructed to the right of the oriented input geometry, otherwise it is constructed to the left. For a simple polygon, the orientation of outer rings is clockwise and for inner rings it is counterclockwise. So the "right side" of a simple polygon is always its inside. The bevelRatio is multiplied by the offset distance and the result determines how far a mitered offset intersection can be from the input curve before it is beveled.

Supports true curves as input, producing a densified curve as output where applicable.

Applies to

Platforms and versions

Target	Versions
.NET Standard 2.0	100.3 - 200.6
.NET	100.13 - 200.6
.NET Windows	100.13 - 200.6
.NET Android	200.0 - 200.6
.NET iOS	200.0 - 200.6
.NET Framework	100.0 - 200.6
Xamarin.Android	100.0 - 100.15
Xamarin.iOS	100.0 - 100.15
UWP	100.0 - 200.6