topic Re: Rotate map extent in ArcGIS API for Silverlight Questions

Rotate map extent

MelitonTienda_Avila — Thu, 13 Mar 2014 19:11:58 GMT

Hello Guys.
I need to set the major extent to map for
visualize one line geometry when i rotate map.

The next image shows the goal.

Hope you can help me..

Regards

Re: Rotate map extent

AhmedEl-Sisi — Tue, 18 Mar 2014 08:02:59 GMT

Try zooming to your feature using Map.ZoomTo Method After rotation.

Re: Rotate map extent

MelitonTienda_Avila — Tue, 29 Apr 2014 23:01:30 GMT

Hi,

I've tried to zoom to the geometry after rotation map, but I'm still having the problem

Regards..

Re: Rotate map extent

AhmedEl-Sisi — Wed, 30 Apr 2014 07:25:41 GMT

It's about aspect ratio of your map.
Try to keep Width/Height ration near 1.0

Re: Rotate map extent

MelitonTienda_Avila — Wed, 30 Apr 2014 13:34:04 GMT

Hi, Thanks for your reply.

My map is Height=300, and Width=700.

Do you have any example that you can give me?

I would appreciate...

Re: Rotate map extent

AhmedEl-Sisi — Mon, 05 May 2014 05:08:02 GMT

Try to change your map width/height to be equal.

Re: Rotate map extent

MelitonTienda_Avila — Mon, 12 May 2014 14:02:26 GMT

Thanks for your sample code.

But I can´t change the width and height map properties.
I need to keep this properties for save map image after rotate process in a pdf report like next image shows.

Re: Rotate map extent

MelitonTienda_Avila — Fri, 16 May 2014 15:22:30 GMT

Thanks for your sample code it's very useful for me.
But in map rotation scenario can be any rotation angle.
The example works fine for 90 degrees rotation but for Map.Rotation = -45 not.

I apologize for not describe it.
Any Suggestion for this approach?

Thanks.

Re: Rotate map extent

AhmedEl-Sisi — Sun, 12 Dec 2021 06:29:52 GMT

Try This Zoom Method, Use it in the previous sample and enhance it according to your business.

         private void ZoomToGraphic()
        {
            if (activeGraphic != null && activeGraphic.Geometry != null)
            {
                var graphicExtent = activeGraphic.Geometry.Extent;
                var mapExtent = MyMap.Extent;
                double mapExtentWidth = mapExtent.XMax - mapExtent.XMin;
                double mapExtentHeight = mapExtent.YMax - mapExtent.YMin;
                if (MyMap.Rotation != 0)
                {
                    mapExtentHeight = mapExtent.XMax - mapExtent.XMin;
                    mapExtentWidth = mapExtent.YMax - mapExtent.YMin;
                }
                //Just Center the map to your graphic
                MyMap.PanTo(graphicExtent.GetCenter());
                //Zoom using factor.
                double xRatio = mapExtentWidth / graphicExtent.Width;
                double yRatio = mapExtentHeight /graphicExtent.Height;
                MyMap.Zoom(xRatio > yRatio ? yRatio : xRatio);
            }
        }

Regards,