Showing Latitude and Longitude in Degrees, minutes and seconds

Question

Hi, I'm having trouble showing the map coordinates in latitude/longitude in degrees (like "75° 9�?? 18.382�?� West longitude by 39° 59�?? 0.637�?� North latitude"). I followed this post , and came to this: // Lat/Long. else if (mapa.SpatialReference.WKID == 4326) { Point screenPoint = e.GetPosition(mapa); MapPoint mapPoint = mapa.ScreenToMap(screenPoint); Graphic ponto = new Graphic(); ponto.Geometry = mapPoint; ponto.Geometry.SpatialReference = new SpatialReference(32640); IList listaDePontos = new List(); listaDePontos.Add(ponto); GeometryService servicoGeometrico = new GeometryService(@"http://gis.informs.conder.ba.gov.br/ArcGIS/rest/services/Geometry/GeometryServer"); servicoGeometrico.ProjectCompleted += (s, args) => { IList results = args.Results; Graphic projectedG = results[0]; CoordenadasDoMapa = string.Format("Coordenadas: N = {0}, E = {1}", Math.Round(projectedG.Geometry.Extent.XMin, 4), Math.Round(projectedG.Geometry.Extent.YMin, 4)); }; servicoGeometrico.ProjectAsync(listaDePontos, new SpatialReference(4326)); } But this doesn't show in Degrees, minutes and seconds.

TerryGiles · Answer

Hello,

I think you have 2 problems here -

1. I think your logic is off in your code.  You're checking to see if the map is in Geographic (srid = 4326) and if it is, creating a new point with the same coords as the map point but defining the new points projection as UTM Zone 40 (srid =32640).  I think you want to check if your map is not in geographic, e.g (mapa.SpatialReference.WKID != 4326)

2.  In the project complete from the geometry service, if you're projecting the point to 4326, the units are in decimal degrees.  It's easy to conver that to Degree Minutes Seconds with some quick math... A quick Google search yielded this -http://geography.about.com/library/howto/htdegrees.htm  for example.

Hope this helps,

Terry

jonataspovoas · Answer

Hi,

I used this code, with some small adaptations, and it worked.

http://kiwigis.blogspot.com/2009/05/convert-decimal-degrees-to-degrees.html