public JPEGFileItem( string filePath)
{
_filePath = filePath;
AnalyzeExif(_filePath);
_newLocation = new GPSLocation();
}
private void AnalyzeExif(string filePath)
{
DateTime dt = DateTime.MinValue;
string sNS = string.Empty;
string sEW = string.Empty;
UInt32[] uLon = null;
UInt32[] uLat = null;
using (Bitmap bmp = new Bitmap(filePath))
{
// 0x0001-北緯(N) or 南緯(S)(Ascii)
// 0x0002-緯度(数値)(Rational)
// 0x0003-東経(E) or 西経(W)(Ascii)
// 0x0004-経度(数値)(Rational)
// 0x0005-高度の基準(Byte)
// 0x0006-高度(数値)(Rational)
// 0x0007-GPS時間(原子時計の時間)(Rational)
// 0x0008-測位に使った衛星信号(Ascii)
// 0x0009-GPS受信機の状態(Ascii)
// 0x000A-GPSの測位方法(Ascii)
// 0x000B-測位の信頼性(Rational)
// 0x000C-速度の単位(Ascii)
// 0x000D-速度(数値)(Rational)
foreach (System.Drawing.Imaging.PropertyItem item in bmp.PropertyItems)
{
switch (item.Id)
{
// 0x9004 - デジタルデータの作成日時
case 0x9004:
if (0 == dt.CompareTo(DateTime.MinValue))
{
string s = System.Text.Encoding.ASCII.GetString(item.Value);
s = s.Trim(new char[] { '\0' });
{
s = System.Text.RegularExpressions.Regex.Replace(s,
@"^(?<year>(?:\d\d)?\d\d):(?<month>\d\d?):(?<day>\d\d?)",
"${year}/${month}/${day}");
}
dt = DateTime.Parse(s);
}
break;
// 0x9003 - 原画像データの生成日時
case 0x9003:
{
string s = System.Text.Encoding.ASCII.GetString(item.Value);
s = s.Trim(new char[] { '\0' });
{
s = System.Text.RegularExpressions.Regex.Replace(s,
@"^(?<year>(?:\d\d)?\d\d):(?<month>\d\d?):(?<day>\d\d?)",
"${year}/${month}/${day}");
}
dt = DateTime.Parse(s);
}
break;
// 0x0001-北緯(N) or 南緯(S)(Ascii)
case 0x0001:
sNS = System.Text.Encoding.ASCII.GetString(item.Value);
sNS = sNS.Trim(new char[] { '\0' });
break;
// 0x0002-緯度(数値)(Rational):latitude - 緯度
case 0x0002:
{
if (4 <= item.Len)
{
uLat = new UInt32[item.Len / 4];
System.Buffer.BlockCopy(item.Value, 0, uLat, 0, item.Len);
}
}
break;
// 0x0003-東経(E) or 西経(W)(Ascii)
case 0x0003:
sEW = System.Text.Encoding.ASCII.GetString(item.Value);
sEW = sEW.Trim(new char[] { '\0' });
break;
// 0x0004-経度(数値)(Rational)：longitude - 経度
case 0x0004:
{
if (4 <= item.Len)
{
uLon = new UInt32[item.Len / 4];
System.Buffer.BlockCopy(item.Value, 0, uLon, 0, item.Len);
}
}
break;
}
}
}
_targetdate = dt;
// 経度
GPSLocation.LongitudeFlag lonFlag = GPSLocation.LongitudeFlag.INVALID;
if (0 == string.Compare(sEW, "E", true))
{
lonFlag = GPSLocation.LongitudeFlag.EAST;
}
else if (0 == string.Compare(sEW, "W", true))
{
lonFlag = GPSLocation.LongitudeFlag.WEST;
}
// 緯度
GPSLocation.LatitudeFlag latFlag = GPSLocation.LatitudeFlag.INVALID;
if (0 == string.Compare(sNS, "N", true))
{
latFlag = GPSLocation.LatitudeFlag.NORTH;
}
else if (0 == string.Compare(sNS, "S", true))
{
latFlag = GPSLocation.LatitudeFlag.SOUTH;
}
_currentLocation = new GPSLocation(lonFlag, uLon, latFlag, uLat);
}
private void AnalyzeExif(string filePath)
{
DateTime dt = DateTime.MinValue;
string sNS = string.Empty;
string sEW = string.Empty;
UInt32[] uLon = null;
UInt32[] uLat = null;
using (Bitmap bmp = new Bitmap(filePath))
{
// 0x0001-北緯(N) or 南緯(S)(Ascii)
// 0x0002-緯度(数値)(Rational)
// 0x0003-東経(E) or 西経(W)(Ascii)
// 0x0004-経度(数値)(Rational)
// 0x0005-高度の基準(Byte)
// 0x0006-高度(数値)(Rational)
// 0x0007-GPS時間(原子時計の時間)(Rational)
// 0x0008-測位に使った衛星信号(Ascii)
// 0x0009-GPS受信機の状態(Ascii)
// 0x000A-GPSの測位方法(Ascii)
// 0x000B-測位の信頼性(Rational)
// 0x000C-速度の単位(Ascii)
// 0x000D-速度(数値)(Rational)
foreach (System.Drawing.Imaging.PropertyItem item in bmp.PropertyItems)
{
switch (item.Id)
{
// 0x9004 - デジタルデータの作成日時
case 0x9004:
if (0 == dt.CompareTo(DateTime.MinValue))
{
string s = System.Text.Encoding.ASCII.GetString(item.Value);
s = s.Trim(new char[] { '\0' });
{
s = System.Text.RegularExpressions.Regex.Replace(s,
@"^(?<year>(?:\d\d)?\d\d):(?<month>\d\d?):(?<day>\d\d?)",
"${year}/${month}/${day}");
}
dt = DateTime.Parse(s);
}
break;
// 0x9003 - 原画像データの生成日時
case 0x9003:
{
string s = System.Text.Encoding.ASCII.GetString(item.Value);
s = s.Trim(new char[] { '\0' });
{
s = System.Text.RegularExpressions.Regex.Replace(s,
@"^(?<year>(?:\d\d)?\d\d):(?<month>\d\d?):(?<day>\d\d?)",
"${year}/${month}/${day}");
}
dt = DateTime.Parse(s);
}
break;
// 0x0001-北緯(N) or 南緯(S)(Ascii)
case 0x0001:
sNS = System.Text.Encoding.ASCII.GetString(item.Value);
sNS = sNS.Trim(new char[] { '\0' });
break;
// 0x0002-緯度(数値)(Rational):latitude - 緯度
case 0x0002:
{
if (4 <= item.Len)
{
uLat = new UInt32[item.Len / 4];
System.Buffer.BlockCopy(item.Value, 0, uLat, 0, item.Len);
}
}
break;
// 0x0003-東経(E) or 西経(W)(Ascii)
case 0x0003:
sEW = System.Text.Encoding.ASCII.GetString(item.Value);
sEW = sEW.Trim(new char[] { '\0' });
break;
// 0x0004-経度(数値)(Rational)：longitude - 経度
case 0x0004:
{
if (4 <= item.Len)
{
uLon = new UInt32[item.Len / 4];
System.Buffer.BlockCopy(item.Value, 0, uLon, 0, item.Len);
}
}
break;
}
}
}
_targetdate = dt;
// 経度
GPSLocation.LongitudeFlag lonFlag = GPSLocation.LongitudeFlag.INVALID;
if (0 == string.Compare(sEW, "E", true))
{
lonFlag = GPSLocation.LongitudeFlag.EAST;
}
else if (0 == string.Compare(sEW, "W", true))
{
lonFlag = GPSLocation.LongitudeFlag.WEST;
}
// 緯度
GPSLocation.LatitudeFlag latFlag = GPSLocation.LatitudeFlag.INVALID;
if (0 == string.Compare(sNS, "N", true))
{
latFlag = GPSLocation.LatitudeFlag.NORTH;
}
else if (0 == string.Compare(sNS, "S", true))
{
latFlag = GPSLocation.LatitudeFlag.SOUTH;
}
_currentLocation = new GPSLocation(lonFlag, uLon, latFlag, uLat);
}
