public virtual GeoLocation GetGeoLocation()
{
Rational[] latitudes = GetRationalArray(Com.Drew.Metadata.Exif.GpsDirectory.TagLatitude);
Rational[] longitudes = GetRationalArray(Com.Drew.Metadata.Exif.GpsDirectory.TagLongitude);
string latitudeRef = GetString(Com.Drew.Metadata.Exif.GpsDirectory.TagLatitudeRef);
string longitudeRef = GetString(Com.Drew.Metadata.Exif.GpsDirectory.TagLongitudeRef);
// Make sure we have the required values
if (latitudes == null || latitudes.Length != 3)
{
return(null);
}
if (longitudes == null || longitudes.Length != 3)
{
return(null);
}
if (latitudeRef == null || longitudeRef == null)
{
return(null);
}
double?lat = GeoLocation.DegreesMinutesSecondsToDecimal(latitudes[0], latitudes[1], latitudes[2], Sharpen.Runtime.EqualsIgnoreCase(latitudeRef, "S"));
double?lon = GeoLocation.DegreesMinutesSecondsToDecimal(longitudes[0], longitudes[1], longitudes[2], Sharpen.Runtime.EqualsIgnoreCase(longitudeRef, "W"));
// This can return null, in cases where the conversion was not possible
if (lat == null || lon == null)
{
return(null);
}
return(new GeoLocation((double)lat, (double)lon));
}
/// <summary>
/// Parses various tags in an attempt to obtain a single object representing the latitude and longitude
/// at which this image was captured.
/// </summary>
/// <returns>The geographical location of this image, if possible, otherwise <c>null</c>.</returns>
public GeoLocation?GetGeoLocation()
{
var latitudes = this.GetRationalArray(TagLatitude);
var longitudes = this.GetRationalArray(TagLongitude);
var latitudeRef = this.GetString(TagLatitudeRef);
var longitudeRef = this.GetString(TagLongitudeRef);
// Make sure we have the required values
if (latitudes == null || latitudes.Length != 3)
{
return(null);
}
if (longitudes == null || longitudes.Length != 3)
{
return(null);
}
if (latitudeRef == null || longitudeRef == null)
{
return(null);
}
var lat = GeoLocation.DegreesMinutesSecondsToDecimal(latitudes[0], latitudes[1], latitudes[2], latitudeRef.Equals("S", StringComparison.OrdinalIgnoreCase));
var lon = GeoLocation.DegreesMinutesSecondsToDecimal(longitudes[0], longitudes[1], longitudes[2], longitudeRef.Equals("W", StringComparison.OrdinalIgnoreCase));
// This can return null, in cases where the conversion was not possible
if (lat == null || lon == null)
{
return(null);
}
return(new GeoLocation((double)lat, (double)lon));
}
public string?GetGpsDestLongitudeDescription()
{
var longitudes = Directory.GetRationalArray(GpsDirectory.TagDestLongitude);
var longitudeRef = Directory.GetString(GpsDirectory.TagDestLongitudeRef);
if (longitudes == null || longitudes.Length != 3 || longitudeRef == null)
{
return(null);
}
var lon = GeoLocation.DegreesMinutesSecondsToDecimal(
longitudes[0], longitudes[1], longitudes[2], longitudeRef.Equals("S", StringComparison.OrdinalIgnoreCase));
return(lon == null ? null : GeoLocation.DecimalToDegreesMinutesSecondsString((double)lon));
}