Buffer Display Problem for different input

Anonymous User

Original User: e_saurabh

Hi
  I am performing a buffer functionality to get the results for the buffer drawn around the features. I am following Point,Polyline, Polygon and Envelope feature to draw the buffer results.

When I select the Point feature to draw the buffer it accepts the input distance of 1 - 10 meters and draws the buffer graphics correctly and show on the map. But When I provide the same input distance for Polyline, Polygon and Envelope, it covers the whole of map and draws the buffer graphics for it. As a result I need to provide some smaller distance of say around 0.000005 meters to get the buffer results correctly. Can anybody provide me the solution for this as I need to provide the same disance parameters for all the feaures and need to get the buffer results correctly.

Please find the below code

                        _geometryService.BufferCompleted += GeometryService_BufferCompleted;
                        _geometryService.Failed += GeometryService_Failed;
                        _geometryService.CancelAsync();

                        BufferParameters buffParameters = new BufferParameters();
                        buffParameters.Unit = LinearUnit.Meter;
                        buffParameters.BufferSpatialReference = new SpatialReference(4283);
                        buffParameters.OutSpatialReference = edmsMap.SpatialReference;
                        buffParameters.UnionResults = true;

                        GraphicsLayer graphicsLayerAddress = edmsMap.Layers["selectionGraphicsLayer"] as GraphicsLayer;

                        Graphic graphic = new Graphic()
                        {
                            Symbol = LayoutRoot.Resources["DefaultFillSymbol"] as ESRI.ArcGIS.Client.Symbols.FillSymbol,
                            Geometry = e.Geometry

                        };
                        buffParameters.Distances.Add(bufferDistance);
                        buffParameters.Features.Add(graphic);

                        _geometryService.BufferAsync(buffParameters);





                     GraphicsLayer graphicsLayer = edmsMap.Layers["selectionGraphicsLayer"] as GraphicsLayer;
                if (e.Results != null)
                {
                    foreach (Graphic graphic in e.Results)
                    {
                        graphic.Symbol = LayoutRoot.Resources["BufferSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol;
                        graphicsLayer.Graphics.Add(graphic);
                    }
                }
Attached are the screenshots for the buffer results drawn for Point,Polyline and Polygon.

~Saurabh.

Line.JPG

Point.JPG

Polygon.JPG

DominiqueBroux

I already noticed this strange behavior without explaining it (see this thread).

I suggest you try by setting the BufferSpatialReference to 102100, and, if needed, take care of the mercator distorsion as indicated in the referenced thread.