如何使用xamarin表单将经度和纬度设置为图片？

using Xamarin.Forms.Maps;
using Xamarin.Essentials;

public class MapPage : ContentPage
{
    public MapPage()
    {
        var map = new Map();
        Content = map;
    }
}

protected override async void OnAppearing()
{
    base.OnAppearing();

    var location = await Geolocation.GetLastKnownLocationAsync();
    if (location != null)
    {
        var position = new Position(location.Latitude, location.Longitude);
        var map = (Map)Content;
        map.MoveToRegion(MapSpan.FromCenterAndRadius(position, Distance.FromKilometers(1)));
    }
}

private async Task<string> CaptureMapAsync()
{
    var map = (Map)Content;
    var stream = await map.GetSnapshotAsync();
    var file = Path.Combine(FileSystem.CacheDirectory, "map.png");
    using (var fileStream = new FileStream(file, FileMode.Create, FileAccess.Write))
    {
        await stream.CopyToAsync(fileStream);
    }
    return file;
}

private async void CaptureButton_Clicked(object sender, EventArgs e)
{
    var filePath = await CaptureMapAsync();
    var image = new Image { Source = ImageSource.FromFile(filePath) };
    Content = image;
}