topic Re: How to get polygon all coordinates in ArcGIS API for Silverlight Questions

How to get polygon all coordinates

DevaKa — Wed, 04 Jul 2012 13:12:54 GMT

Hi All,

I want to know how to get polygon all coordinates? I have a situation to save all coordinates. If I draw a multi-line, I have to capture all coordinates for it. When I use Client.Graphic.Extent.toString(), I am getting only 4 coordinates (If I am not wrong it might be minx,miny, maxx,maxy) when I draw rectangle and point. But I want to capture all coordinates for polygon and multiline.

thanks in Advance.

Re: How to get polygon all coordinates

LanceCrumbliss — Sat, 11 Dec 2021 11:48:42 GMT

Hi All,

I want to know how to get polygon all coordinates? I have a situation to save all coordinates. If I draw a multi-line, I have to capture all coordinates for it. When I use Client.Graphic.Extent.toString(), I am getting only 4 coordinates (If I am not wrong it might be minx,miny, maxx,maxy) when I draw rectangle and point. But I want to capture all coordinates for polygon and multiline.

thanks in Advance.

Forgive me, as this is air-code, but the logic is:

if the graphic's geometry is a polygon then 
   For each ring in the polygon's rings
        for each mappoint in the ring's pointcollection
          do something with the mappoint (like get mappoint.X and mappoint.Y) 
       next mappoint
     next ring
End if

Re: How to get polygon all coordinates

DevaKa — Sat, 11 Dec 2021 11:48:45 GMT

Thanks for prompt response.

if the graphic's geometry is a polygon then 
   For each ring in the polygon's rings
        for each mappoint in the ring's pointcollection
          do something with the mappoint (like get mappoint.X and mappoint.Y) 
       next mappoint
     next ring
End if

I am new to this Silverlight viewer. I didn't find any rings or mappoint or pointcollections in graphics.

Re: How to get polygon all coordinates

JoeHershman — Sat, 11 Dec 2021 11:48:48 GMT

A Graphic object has a Geometry property so what is described above is something like


  if ( graphic.Geometry is Polygon )
  { 
.....
  }

Re: How to get polygon all coordinates

LanceCrumbliss — Wed, 04 Jul 2012 18:14:31 GMT

Thanks for prompt response.

I am new to this Silverlight viewer. I didn't find any rings or mappoint or pointcollections in graphics.

THe graphic's geometry.�?? not the graphic itself.

Re: How to get polygon all coordinates

DevaKa — Sat, 11 Dec 2021 11:48:50 GMT


  if ( graphic.Geometry is Polygon )
  { 
.....
  }

Joe, how to get coordinates for each side of polygon? I am drawing only a polygon. I want to get all coordinates of polygon.

Re: How to get polygon all coordinates

JoeHershman — Thu, 05 Jul 2012 06:03:19 GMT

   if ( graphic.Geometry is Polygon )   {  .....   } 
Joe, how to get coordinates for each side of polygon? I am drawing only a polygon. I want to get all coordinates of polygon.

         private void ShowPolyCoords(Graphic graphic)         {             var polygon = graphic.Geometry as Polygon;             if ( polygon == null ) return;               PointCollection points = polygon.Rings[0];             foreach (var point in points)             {                 Debug.WriteLine("X: {0}, Y: {1}", point.X, point.Y);             }         }

Re: How to get polygon all coordinates

DevaKa — Thu, 05 Jul 2012 14:21:16 GMT

Thanks Joe. It works fine.