topic Re: GPX Viewer in ArcGIS API for Silverlight Questions

GPX Viewer

CraigPerreault — Wed, 23 Jun 2010 14:30:29 GMT

Does anyone have a code sample to view GPX files using the Silverlight API.

In the code gallery for JAVA there is an example to read GPX files at:
http://resources.esri.com/arcgisserver/adf/java/index.cfm?fa=codeGalleryDetails&scriptID=16775

Re: GPX Viewer

DanielWalton — Wed, 23 Jun 2010 15:27:40 GMT

Wait a few days. I suspect Morten is cooking something up...

Re: GPX Viewer

dotMorten_esri — Wed, 23 Jun 2010 16:06:30 GMT

Haha Dan. Unfortunately I"m not working on what you think I'm working on.

Craig: You can use the GPX layer posted here: http://esrislcontrib.codeplex.com/

Re: GPX Viewer

CraigPerreault — Thu, 24 Jun 2010 13:28:31 GMT

Bummer. I have downloaded the latest from that post, but have not been able to get it to work.
There is an event but no code behind it (looks like this):

        private void btnLoadGPX_Click( object sender, RoutedEventArgs e )
        {

        }

I would really like to read a .GPX file by selecting one from the client machine.

Re: GPX Viewer

CraigPerreault — Thu, 24 Jun 2010 21:09:43 GMT

For anyone interested in code that reads a GPX file from the client machine.

       private void btnLoadGPX_Click(object sender, RoutedEventArgs e)
        {
            //Create the dialog allowing the user to select a "*.GPX" file
            OpenFileDialog ofd = new OpenFileDialog();
            ofd.Filter = "GPX Files|*.gpx";
            ofd.Multiselect = false;

            if (!(ofd.ShowDialog() ?? false))
                return;

            StreamReader reader = new StreamReader(ofd.File.OpenRead());
            Stream contents = reader.BaseStream;

            gpxType _source = GPXReader.ReadGPX(contents);
            GraphicCollection graphicCollection = GPXHelper.LoadGraphics(_source);

            GraphicsLayer graphicsLayer = MyMap.Layers["gpxLayer"] as GraphicsLayer;
            graphicsLayer.ClearGraphics();

            foreach (Graphic gr in graphicCollection)
            {
                graphicsLayer.Graphics.Add(gr);
            }

            reader.Close();
        }

Re: GPX Viewer

ErikEngstrom — Thu, 23 Jun 2011 12:48:28 GMT

How are you folks handling the reprojection from WGS84 to Web Mercator?
Assuming most gpx tracks and waypoints are not in Web Mercator.

I'm assuming you could use the GeographicToWebMercator Method, but where specifically?

Re: GPX Viewer

ErikEngstrom — Fri, 10 Dec 2021 20:24:54 GMT

Nevermind, I figured it out...
For those that care:

In the GPXHelper.cs file of the Vishcious.ArcGIS.SLContrib GPXTypes folder..
I changed:

        
         public static MapPoint LoadWayPointGeometry( wptType wpt )
        {
            wpt.RequireArgument<wptType>( "wpt" ).NotNull<wptType>();
            return new MapPoint( ( double ) wpt.lon, ( double ) wpt.lat );
        }

To:

        public static MapPoint LoadWayPointGeometry( wptType wpt )
        {
                        wpt.RequireArgument<wptType>( "wpt" ).NotNull<wptType>();
   
                        MapPoint g = new MapPoint((double)wpt.lon, (double)wpt.lat);
   MapPoint mpGeom = ESRI.ArcGIS.Client.Bing.Transform.GeographicToWebMercator(g);
   return mpGeom;
        }

Re: GPX Viewer

OlgaDupont — Wed, 15 Jan 2014 18:57:50 GMT

Hi,

This is a old post but... is there a API to add GXP file to ArcGis server 10.2 using Silverlight

TY