Reproject a Polygon

AaronNash1 — Tue, 14 Oct 2014 19:41:18 GMT

I am a little confused by the output of reprojecting a polygon. I have a polygon created from a series of map points and i need to reproject the polygon from web mercator to CT State plane NAD83. I am able to get results back from the geometry service but the output is not consistent and it appears to have slightly shifted the polygon. I use the same coordinate latitude for two points, and the same longitude for two points to draw a box. The returned polygon does not have 2 coordinates with the same longitude or 2 with the same latitude.

private function projectPolygon(polygon:Polygon):void

{

const projParam:ProjectParameters = new ProjectParameters();

projParam.geometries = [ polygon ];

projParam.outSpatialReference = new SpatialReference(2234);

geometryService.project(projParam, new AsyncResponder(project_resultHandlerPoly, project_faultHandlerPoly, polygon));

}

private function project_resultHandlerPoly(result:Object, token:Object = null):void

{

if (result)

{

var polygon:Geometry = (result as Array)[0] as Polygon;

//add it to an arraycollection for later use

polygonResultAC[polygonResultAC.length - 1].polyState = polygon;

}

private function project_faultHandlerPoly(fault:Fault, token:Object = null):void

{

Alert.show(fault.faultString + "\n\n" + fault.faultDetail, "project Fault " + fault.faultCode);

}

topic Reproject a Polygon in ArcGIS API for Flex Questions

Reproject a Polygon