topic Re: Convert a Polygon to Polyline for cut in ArcGIS API for Flex Questions

Convert a Polygon to Polyline for cut

Anonymous User — Mon, 01 Apr 2013 16:25:42 GMT

I'm attempting to clip polygons with another polygon using the the cut operation. The geomtry service requires a polyline for the "cutter" and the target can be polygons. I have a polygon that I need to convert to a polyline(paths) before I can do the clip/cut. Does someone have the code to do this conversion. It might be simple - but, I can't find it. thanks

Re: Convert a Polygon to Polyline for cut

RobertScheitlin__GISP — Mon, 01 Apr 2013 16:37:29 GMT

Dan,

Just take the Polygons.rings array and set them to the paths array of a new polyline.

Re: Convert a Polygon to Polyline for cut

Anonymous User — Mon, 01 Apr 2013 19:21:34 GMT

cutPline.paths = poly.rings;
Well, I have have my polyline, thanks - let's see if I can use it to cut some polygons.

Dan,

Just take the Polygons.rings array and set them to the paths array of a new polyline.

Re: Convert a Polygon to Polyline for cut

Anonymous User — Sun, 12 Dec 2021 02:01:35 GMT

    function polygonToPolyline(polygon:Polygon):Polyline
    {
     const polyline:Polyline = new Polyline;
     for each (var ring:Array in polygon.rings)
     {
      polyline.addPath(ring);
     }
     return polyline;
    }

Re: Convert a Polygon to Polyline for cut

PriyaRam — Sun, 12 Dec 2021 02:01:38 GMT

    function polygonToPolyline(polygon:Polygon):Polyline
    {
     const polyline:Polyline = new Polyline;
     for each (var ring:Array in polygon.rings)
     {
      polyline.addPath(ring);
     }
     return polyline;
    }

I tried with your example provided, but the cut didn't work. Did you get this working? Two polygons overlap on the top of each other in my case. Probably I'm missing a spatial reference, where should I set it.

              var arr:Array = fireAreas.selectedFeatures;
        
 var polyLineTemp:Polyline = polygonToPolyline( ((arr[1] as Graphic).geometry) as Polygon);
     
 var arr1:Array = [];
 arr1.push((arr[0] as Graphic ).geometry);
              
 geomService.cut( arr1,polyLineTemp, new AsyncResponder(onQueryResult, onQueryFault) );

Thanks,,
Priya