private async Task GeoTagPhotoAsync()
{
// see if the photo already contains geo coords
var exif = new ExifInterface(_file.Path);
if (!string.IsNullOrWhiteSpace(exif.GetAttribute(ExifInterface.TagGpsLatitude)))
return;
RequestCurrentLocation();
var location = await _locationTCS.Task;
try
{
int num1Lat = (int)Math.Floor(location.Latitude);
int num2Lat = (int)Math.Floor((location.Latitude - num1Lat) * 60);
double num3Lat = (location.Latitude - ((double)num1Lat + ((double)num2Lat / 60))) * 3600000;
int num1Lon = (int)Math.Floor(location.Longitude);
int num2Lon = (int)Math.Floor((location.Longitude - num1Lon) * 60);
double num3Lon = (location.Longitude - ((double)num1Lon + ((double)num2Lon / 60))) * 3600000;
exif.SetAttribute(ExifInterface.TagGpsLatitude, num1Lat + "/1," + num2Lat + "/1," + num3Lat + "/1000");
exif.SetAttribute(ExifInterface.TagGpsLongitude, num1Lon + "/1," + num2Lon + "/1," + num3Lon + "/1000");
if (location.Latitude > 0)
{
exif.SetAttribute(ExifInterface.TagGpsLatitudeRef, "N");
}
else
{
exif.SetAttribute(ExifInterface.TagGpsLatitudeRef, "S");
}
if (location.Longitude > 0)
{
exif.SetAttribute(ExifInterface.TagGpsLongitudeRef, "E");
}
else
{
exif.SetAttribute(ExifInterface.TagGpsLongitudeRef, "W");
}
exif.SaveAttributes();
}
catch (Java.IO.IOException)
{
// location will not be available on this image, but continue
}
}