C # How to obtain the GPS information and latitude and longitude in The Exif information in the photo

 

Ihua forever C # How to obtain the GPS information and latitude and longitude in The Exif information in the photo

 

10 .. Supplement:I hope to provide detailed code. The code I found on the Internet cannot accurately calculate the longitude and latitude information. Supplement:

Additional Section Code

 

# Region
// Merge the image into the video.
Image objImage = Image. FromFile ("E: \ Pictures \ 20080512131.jpg ");
// Obtain all the adequacy (sorted by PropertyId)
Var propertyItems = objImage. PropertyItems. OrderBy (x => x. Id );
// When the regression degree is N (North Region)
Char chrGPSLatitudeRef = 'n ';
// Adjust the economic experience to E (Eastern)
Char chrGPSLongitudeRef = 'E ';
Foreach (PropertyItem objItem in propertyItems)
{
// Only use Id 00000000000000 to 0x001e
If (objItem. Id> = 0x0000 & objItem. Id <= 0x001e)
{
ObjItem. Id = 0x0002;
Switch (objItem. Id)
{
Case 0x0000:
Var query = from tmpb in objItem. Value select tmpb. ToString ();
String sreVersion = string. Join (".", query. ToArray ());
RichTextBox1.Text = sreVersion;
Break;
Case 0x0001:
ChrGPSLatitudeRef = BitConverter. ToChar (objItem. Value, 0 );
Break;
Case 0x0002:
If (objItem. Value. Length = 24)
{
// Degrees (set byte [0] ~ Byte [3] splits into uint, divided by byte [4] ~ Byte [7] uint converted into bytes)
Double d = BitConverter. ToUInt32 (objItem. Value, 0) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 4 );
// Minutes (set byte [8] ~ Byte [11] splits into uint, divided by byte [12] ~ Byte [15] uint converted into bytes)
Double m = BitConverter. ToUInt32 (objItem. Value, 8) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 12 );
// Seconds (set byte [16] ~ Byte [19] equals to uint, divided by byte [20] ~ Byte [23] uint converted into bytes)
Double s = BitConverter. ToUInt32 (objItem. Value, 16) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 20 );
// Calculates the number of degrees. If it is a South region, it must be multiplied by (-1)
Double dblGPSLatitude = (s/60 + m)/60) + d) * (chrGPSLatitudeRef. Equals ('n ')? 1:-1 );
String strLatitude = string. format ("{0: #} deg {1: #} '{2 :#. 00 }\ "{3}", d, m, s, chrGPSLatitudeRef );
}
Break;
Case 0x0003:
// Convert the Value into Char ('E'/'W') through BitConverter ')
// This value is used in the longpolling calculation of the backend vertex.
ChrGPSLongitudeRef = BitConverter. ToChar (objItem. Value, 0 );
Break;
Case 0x0004:
If (objItem. Value. Length = 24)
{
// Degrees (set byte [0] ~ Byte [3] splits into uint, divided by byte [4] ~ Byte [7] uint converted into bytes)
Double d = BitConverter. ToUInt32 (objItem. Value, 0) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 4 );
// Minutes (set byte [8] ~ Byte [11] splits into uint, divided by byte [12] ~ Byte [15] uint converted into bytes)
Double m = BitConverter. ToUInt32 (objItem. Value, 8) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 12 );
// Seconds (set byte [16] ~ Byte [19] equals to uint, divided by byte [20] ~ Byte [23] uint converted into bytes)
Double s = BitConverter. ToUInt32 (objItem. Value, 16) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 20 );
// Calculates the number of degrees. If it is a western economy, it must be multiplied by (-1)
Double dblgpslong1_= (s/60 + m)/60) + d) * (chrGPSLongitudeRef. Equals ('E ')? 1:-1 );
Console. WriteLine ("{0: #} deg {1: #} '{2: #. 00} \" {3} ", d, m, s, chrGPSLongitudeRef );
}
Break;
Case 0x0005:
String strAltitude = BitConverter. ToBoolean (objItem. Value, 0 )? "0": "1 ";
Break;
Case 0x0006:
If (objItem. Value. Length = 8)
{
// Change byte [0] ~ Byte [3] splits into uint, divided by byte [4] ~ Byte [7] uint converted into bytes
Double dblAltitude = BitConverter. ToUInt32 (objItem. Value, 0) * 1.0d/BitConverter. ToUInt32 (objItem. Value, 4 );
}
Break;
}
}
}
# Endregion