How to modify ESRI.ArcGIS.Geometry.IPoint to get decimal degrees?

TomMagdaleno

Hi All,
  I think I have a simple question.  This code returns the XY of the point clicked in feet.  I would like to get it in decimal degrees.  How would I modify the code?

using System; using System.Collections.Generic; using System.Text; using System.IO;  namespace ArcMapAddin1 {     public class HyperlinkIStreet : ESRI.ArcGIS.Desktop.AddIns.Tool     {         public HyperlinkIStreet()         {         }          protected override void OnUpdate()         {         }     //private const string USER_PROMPT_3 = "Are you sure you want to hyperlink to IStreetView?";     private const string CAPTION_3 = "Hyperlink to IStreet";     protected override void OnMouseDown(ESRI.ArcGIS.Desktop.AddIns.Tool.MouseEventArgs arg) {     //var result = System.Windows.Forms.MessageBox.Show(USER_PROMPT_3, CAPTION_3,      //      System.Windows.Forms.MessageBoxButtons.YesNo,      //      System.Windows.Forms.MessageBoxIcon.Question);     //if (result == System.Windows.Forms.DialogResult.Yes)     {  //Get coordinates from MouseEventArgs         ESRI.ArcGIS.ArcMapUI.IMxDocument mxDoc = ArcMap.Document;         ESRI.ArcGIS.Carto.IActiveView activeView = mxDoc.FocusMap as ESRI.ArcGIS.Carto.IActiveView;         ESRI.ArcGIS.Geometry.IPoint point = activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(arg.X, arg.Y) as ESRI.ArcGIS.Geometry.IPoint;         //Open IStreetView in default browser         System.Diagnostics.Process.Start("http://maps.google.com/maps?q=&layer=c&cbll="             + point.X + "," + point.Y + "&cbp=12,100,0,0,0&output=svembed&t=m&z=17");     } }                        }  }

TerryGiles

That code should go between the line where create your point object & opening StreetView.


On which line does it fail?  Do you have a Using directive for Esri.ArcGIS.Geometry? If not, try one of the following :
use the full namespace , ESRI.ArcGIS.Geometry.ISpatialReferenceFactory srFact = ESRI.ArcGIS.Geometry.new SpatialReferenceEnvironmentClass();
Other things to try -

• if it's failing on Type factoryType = null, either adding a Using directive for System or qualify the name = System.Type factoryType = null;
• instead of GetTypefromProgID try Type.GetTypeFromCLSID("") - the GUID for the SRfactory can be found here http://resources.arcgis.com/en/help/arcobjects-net/conceptualHelp/#/Interacting_with_singleton_objects/00010000043p000000/
•   you can also use ISpatialReferenceFactory srFact = new SpatialReferenceEnvironmentClass(); but see the warnings of doing do one the same page I linked to in the above bullet

Updated code with namespaces here -

ESRI.ArcGIS.Geometry.IPoint point = activeView.ScreenDisplay.DisplayTransformation.ToMapPoint(arg.X, arg.Y) as ESRI.ArcGIS.Geometry.IPoint; //project pt to WGS84 System.Type factoryType = null; factoryType = System.Type.GetTypeFromProgID("esriGeometry.SpatialReferenceEnvironment"); ESRI.ArcGIS.Geometry.ISpatialReferenceFactory srFact = new ESRI.ArcGIS.Geometry.SpatialReferenceEnvironmentClass(); ESRI.ArcGIS.Geometry.IGeographicCoordinateSystem srWGS84 = srFact.CreateGeographicCoordinateSystem(4326); point.Project(srWGS84);  //Open IStreetView in default browser System.Diagnostics.Process.Start("http://maps.google.com/maps?q=&layer=c&cbll="             + point.X + "," + point.Y + "&cbp=12,100,0,0,0&output=svembed&t=m&z=17");