private void GetPhotoLocation(MediaFile file)
{
using (Stream photo = file.GetStream())
{
var picture = ExifReader.ReadJpeg(photo);
ExifOrientation orientation = picture.Orientation;
ExifGpsLatitudeRef latRef = picture.GpsLatitudeRef;
ExifGpsLongitudeRef longRef = picture.GpsLongitudeRef;
latitude.Text = GetLatitude(latRef, picture.GpsLatitude).ToString();
longitude.Text = GetLongitude(picture.GpsLongitude).ToString();
}
}
public static double GetLatitude(ExifGpsLatitudeRef latRef, double[] data)
{
SplitGpsArray(data);
var result = ConvertDegreeToAngle();
if (latRef == ExifGpsLatitudeRef.South)
{
result *= -1;
}
return(result);
}
private double GetLatitude(ExifGpsLatitudeRef latRef, double [] data)
{
double degrees = data[0];
double minutes = data[1];
double seconds = data.Length > 2 ? data[2] : 0.0;
double result = ConvertDegreeToAngle(degrees, minutes, seconds);
if (latRef == ExifGpsLatitudeRef.South)
{
result *= -1;
}
return(result);
}
private void PreviewPhoto(MediaFile mediaFile)
{
using (Stream photo = mediaFile.GetStream())
{
var picture = ExifReader.ReadJpeg(photo);
FilePath = mediaFile.Path;
ExifOrientation orientation = picture.Orientation;
ExifGpsLatitudeRef latRef = picture.GpsLatitudeRef;
ExifGpsLongitudeRef longRef = picture.GpsLongitudeRef;
Latitude = GpsHelper.GetLatitude(latRef, picture.GpsLatitude);
Longitude = GpsHelper.GetLongitude(picture.GpsLongitude);
}
}
/// <summary>
/// Picks up the default bundled photo, extracts location and plots this on map.
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">E.</param>
private void OnClicked(object sender, EventArgs e)
{
var assembly = typeof(ImagePage).GetTypeInfo().Assembly;
Stream stream = assembly.GetManifestResourceStream("XamarinFormsMapsDemo.sample.jpg");
var JpegInfo = ExifReader.ReadJpeg(stream);
lat = JpegInfo.GpsLatitude[0] + JpegInfo.GpsLatitude[1] / 60 + JpegInfo.GpsLatitude[2] / 3600; //JpegInfo.GpsLatitude[0];
lang = JpegInfo.GpsLongitude[0] + JpegInfo.GpsLongitude[1] / 60 + JpegInfo.GpsLongitude[2] / 3600; //JpegInfo.GpsLongitude[0];
ExifGpsLatitudeRef latRef = JpegInfo.GpsLatitudeRef;
ExifGpsLongitudeRef longRef = JpegInfo.GpsLongitudeRef;
if (latRef == ExifGpsLatitudeRef.South)
{
lat = lat * -1;
}
if (longRef == ExifGpsLongitudeRef.West)
{
lang = lang * -1;
}
Navigation.PushModalAsync(new MapPage(lat, lang));
}
/// <summary>
/// This will launch photo gallery. Extracts location from photo and plots those on the map.
/// </summary>
/// <param name="sender">Sender.</param>
/// <param name="e">E.</param>
private async void OnPhotoPickup(object sender, EventArgs e)
{
if (!CrossMedia.Current.IsPickPhotoSupported)
{
//this.ShowUnsupportedMediaAlert ();
return;
}
var ImageFromLibrary = await CrossMedia.Current.PickPhotoAsync();
if (ImageFromLibrary != null)
{
IFile ImageFile = await FileSystem.Current.GetFileFromPathAsync(ImageFromLibrary.Path);
Stream stream = await ImageFile.OpenAsync(FileAccess.Read);
var JpegInfo = ExifReader.ReadJpeg(stream);
lat = JpegInfo.GpsLatitude[0] + JpegInfo.GpsLatitude[1] / 60 + JpegInfo.GpsLatitude[2] / 3600; //JpegInfo.GpsLatitude[0];
lang = JpegInfo.GpsLongitude[0] + JpegInfo.GpsLongitude[1] / 60 + JpegInfo.GpsLongitude[2] / 3600; //JpegInfo.GpsLongitude[0];
ExifGpsLatitudeRef latRef = JpegInfo.GpsLatitudeRef;
ExifGpsLongitudeRef longRef = JpegInfo.GpsLongitudeRef;
if (latRef == ExifGpsLatitudeRef.South)
{
lat = lat * -1;
}
if (longRef == ExifGpsLongitudeRef.West)
{
lang = lang * -1;
}
await Navigation.PushModalAsync(new MapPage (lat, lang));
}
}
public static double ConvertDegreeAngleToDouble(double degrees, double minutes, double seconds, ExifGpsLatitudeRef latRef)
{
double result = ConvertDegreeAngleToDouble(degrees, minutes, seconds);
if (latRef == ExifGpsLatitudeRef.South)
{
result *= -1;
}
return(result);
}
