private List <MarkerListViewItem> GetMarkersWithDistances(List <Marker> markersList)
{
List <MarkerListViewItem> list = new List <MarkerListViewItem>();
foreach (Marker marker in markersList)
{
var item = new MarkerListViewItem()
{
Marker = marker
};
if (_currentLat != null && _currentLong != null)
{
/*
* // Adapted from https://forums.xamarin.com/discussion/comment/34987/#Comment_34987
* double d = Math.Acos(
* (Math.Sin((double)_currentLat) * Math.Sin(marker.Latitude)) +
* (Math.Cos((double)_currentLat) * Math.Cos(marker.Latitude))
* Math.Cos(marker.Longitude - (double)_currentLong));
*
* // in meters
* //item.DistanceAway = (6378137 * d).ToString();
* // in miles
* item.DistanceAway = (3959 * d).ToString();
*/
Double distInMeters = DistanceHelper.DistanceInMetres((double)_currentLat, (double)_currentLong, marker.Latitude, marker.Longitude);
Decimal distInMiles = (Decimal)(distInMeters * 0.000621371);
Decimal distRounded = Decimal.Round(distInMiles, 1);
item.DistanceAway = distRounded.ToString() + " mi";
item.DistanceAwayDecimal = distRounded;
}
else
{
item.DistanceAway = "Unknown";
item.DistanceAwayDecimal = 0;
}
list.Add(item);
}
return(list);
}