Buffer(Geometry,Double) Method
Creates a buffer polygon at the specified distance around the given geometry.
Parameters
- geometry
- Specifies the input geometry.
- distance
- The distance (in the unit of the geometry's spatial reference) to buffer the geometry.
Return Value
The polygon that represents the buffered area. If the input geometry is empty, then an empty polygon is returned.
Zoom to a specified point
//Create a point
var pt = MapPointBuilderEx.CreateMapPoint(x, y,
SpatialReferenceBuilder.CreateSpatialReference(4326));
//Buffer it - for purpose of zoom
var poly = GeometryEngine.Instance.Buffer(pt, buffer_size);
//do we need to project the buffer polygon?
if (!MapView.Active.Map.SpatialReference.IsEqual(poly.SpatialReference))
{
//project the polygon
poly = GeometryEngine.Instance.Project(poly, MapView.Active.Map.SpatialReference);
}
// Must run on MCT.
QueuedTask.Run(() =>
{
//Zoom - add in a delay for animation effect
MapView.Active.ZoomTo(poly, new TimeSpan(0, 0, 0, 3));
});
Buffer a MapPoint
// buffer a point
MapPoint pt = MapPointBuilderEx.CreateMapPoint(1.0, 1.0, SpatialReferences.WGS84);
Geometry ptBuffer = GeometryEngine.Instance.Buffer(pt, 5.0);
Polygon buffer = ptBuffer as Polygon;
Buffer a Circular Arc
// create the circular arc
MapPoint fromPt = MapPointBuilderEx.CreateMapPoint(2, 1);
MapPoint toPt = MapPointBuilderEx.CreateMapPoint(1, 2);
Coordinate2D interiorPt = new Coordinate2D(1 + Math.Sqrt(2) / 2, 1 + Math.Sqrt(2) / 2);
EllipticArcSegment circularArc = EllipticArcBuilderEx.CreateCircularArc(fromPt, toPt, interiorPt);
// buffer the arc
Polyline polyline = PolylineBuilderEx.CreatePolyline(circularArc);
Geometry lineBuffer = GeometryEngine.Instance.Buffer(polyline, 10);
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.