xamarin forms IOS map opens in wrong location - xamarin.forms

Question

I'm developing an app in xamarin forms supposed to works on android and ios.
The problem is that IOS maps displays a wrong location.
IOS Location (WRONG)
Android Location (RIGHT)
Code:
switch (Device.RuntimePlatform)
{
case Device.iOS:
uri = new Uri(string.Format("http://maps.apple.com/?ll={0}", x + ',' + y));
System.Diagnostics.Debug.WriteLine(uri);
Device.OpenUri(uri);
break;
case Device.Android:
uri = new Uri("https://www.google.com/maps/search/?api=1&query=" + x + ',' + y);
System.Diagnostics.Debug.WriteLine(uri);
Device.OpenUri(uri);
break;
}
In this example x="39.7301803" and y="-8.8438668"
UPDATE
Replacing the code above with ExternalMaps plugin
var success = CrossExternalMaps.Current.NavigateTo(Store.Name, Double.Parse(x), Double.Parse(y));
Exactly the same result :(

Answer 1

Both of your links (manually put together) open in the right app and point to the same location
Google-maps
Apple-maps
But when I set the y param to "0" I end up in the exact area of your wrong screenshot. Could it be that there is a problem in your code? Like y not being set (prior to the snippet)
Could you share more of your code?
The difference between both platforms is how you build the string. I would suggest to change the iOS part to:
uri = new Uri("http://maps.apple.com/?ll="+ x + ',' + y));

Answer 2

I can not comment that is why I am answering your question. I do not know why you are executing url to Device browser. I suggest better you use the "Map" control from Xamarin.Forms name space. I think it will full fill your requirement for set position on the exact point on the map.
Here is the good sample of Xamarin.Forms.Map
UPDATE-1
I am not sure weather you want to use plugin or not. I found one good plug which can open external maps to a specific geolocation or address in your Xamarin.iOS, Xamarin.Android, Windows, and Xamarin.Forms projects.
For more details and information please check this.
Just found and tested code here as well not sure if it is helpful to you. You might got the same earlier as well.