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Adding point graphic at center of line feature using geometry service

ImtiyazPasha1

Hi,

I added Point at center of polygon but failed to add point at center of line using geometry service.

help me regarding this

Thanks in advance

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IgressT

Hi,

I added Point at center of polygon but failed to add point at center of line using geometry service.

help me regarding this

Thanks in advance

I think it only works for polygons

ImtiyazPasha1

There should be any option to draw point graphic at center of line using geometry service or without using geometry service please help...

JenniferNery

This might be related thread: http://forums.arcgis.com/threads/29061-How-to-find-the-midpoint-of-a-polyline.

You can get the center of the polyline and add MapPoint in that location.

IgressT

This might be related thread: http://forums.arcgis.com/threads/29061-How-to-find-the-midpoint-of-a-polyline.

You can get the center of the polyline and add MapPoint in that location.

I tried that but it works only if the polyline is a straight line but what if its not.. see the image is there any other way

Capture.PNG

ImtiyazPasha1

This might be related thread: http://forums.arcgis.com/threads/29061-How-to-find-the-midpoint-of-a-polyline.

You can get the center of the polyline and add MapPoint in that location.

Yes polyline.extent.getCenter(); gets the polyline center but not exact center like the geometry service for polygon,

polyline.Extent.getCenter() not work for curved line or polygon it draws graphic outside the polygon or polyline i need the exact center of polyline.

thanks for your reply.

any other option please...

ImtiyazPasha1

any help please......

ImtiyazPasha1

finally I got it using ESRI.ArcGIS.Client.Geometry.PointCollection ps in line.Paths
and

<esriSymbol:PictureMarkerSymbol x:Key="DefaultRasterSymbol" OffsetX="12" OffsetY="34" Source="" />

Thanks for all

DominiqueBroux

You might calculate the center of the polyline at the client side.

Very simplified version:

public static class GeometryExtension
{
    public static MapPoint Center(this Polyline polyline)
    {
        var path = polyline.Paths[polyline.Paths.Count / 2];
        int pointIndex = (path.Count-1)/2;
        MapPoint startPoint = path[pointIndex];
        MapPoint endPoint = path[pointIndex + 1];
        return new MapPoint((startPoint.X + endPoint.X)/2.0, (startPoint.Y + endPoint.Y)/2.0);
    }
}

Then you can get the center of a polyline by : MapPoint center= myPolyline.Center();

This is just returning the center of the middle segment but you might enhance the code depending on what you need exactly.

ImtiyazPasha1

Hi Dominique BROUX,

Yes your right but I did it with different approach.

Thanks

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