Leadtools.Codecs Namespace > RasterCodecs Class > EnumGeoKeys Method : EnumGeoKeys(String,Int32) Method |
public void EnumGeoKeys( string fileName, int pageNumber )
'Declaration Public Overloads Sub EnumGeoKeys( _ ByVal fileName As String, _ ByVal pageNumber As Integer _ )
'Usage Dim instance As RasterCodecs Dim fileName As String Dim pageNumber As Integer instance.EnumGeoKeys(fileName, pageNumber)
public void EnumGeoKeys( string fileName, int pageNumber )
function Leadtools.Codecs.RasterCodecs.EnumGeoKeys(String,Int32)( fileName , pageNumber )
public: void EnumGeoKeys( String^ fileName, int pageNumber )
To enumerate all the keys stored in a stream, use EnumGeoKeys(Stream,Int32).
For multipage Geo TIFF files, you can enumerate the GeoKeys from a particular page. Specify the page number whose GeoKeys to enumerate.
The GeoKeyFound event is called for each GeoKey value stored in the three standard Geo TIFF tags (34735, 34736 and 34737). For enumerating the other standard Geo TIFF data stored as separate tags, you can use EnumTags(String,Int32). Or, you can call ReadTag(String,Int32,Int32) for each of these tags (since there are not that many of them to warrant the use of EnumTags(String,Int32)).
For more information, refer toImplementing GeoKeys (GeoTIFF tags).
Private myGeoKeys As RasterCollection(Of RasterTagMetadata) Private geoKeyFileName As String Private Sub EnumGeoKeysExample(ByVal srcFileName As String, ByVal destFileName As String) Dim codecs As RasterCodecs = New RasterCodecs() geoKeyFileName = srcFileName myGeoKeys = New RasterCollection(Of RasterTagMetadata)() AddHandler codecs.GeoKeyFound, AddressOf codecs_GeyKeyFound codecs.EnumGeoKeys(srcFileName, 1) RemoveHandler codecs.GeoKeyFound, AddressOf codecs_GeyKeyFound ' We read all the tags now, save them to the file Console.WriteLine("{0} GeoKeys read, saving them to the destination file", myGeoKeys.Count) codecs.WriteGeoKeys(destFileName, 1, myGeoKeys) ' Clean up codecs.Dispose() End Sub Private Sub codecs_GeyKeyFound(ByVal sender As Object, ByVal e As CodecsEnumGeoKeysEventArgs) Console.Write("GeoKey: Id={0}, Count={1}, Type={2}, DataLength={3}, Data=", e.Id, e.Count, e.MetadataType, e.Buffer.Length) ' Load this GeoKey Dim codecs As RasterCodecs = TryCast(sender, RasterCodecs) Dim geoKey As RasterTagMetadata = codecs.ReadGeoKey(geoKeyFileName, 1, e.Id) Dim data As Byte() = geoKey.GetData() Dim i As Integer = 0 Do While i < data.Length Console.Write("{0:X} ", data(i)) i += 1 Loop Console.WriteLine() ' Add it to our collection myGeoKeys.Add(geoKey) End Sub
RasterCollection<RasterTagMetadata> myGeoKeys; string geoKeyFileName; void EnumGeoKeysExample(string srcFileName, string destFileName) { RasterCodecs codecs = new RasterCodecs(); geoKeyFileName = srcFileName; myGeoKeys = new RasterCollection<RasterTagMetadata>(); codecs.GeoKeyFound += new EventHandler<CodecsEnumGeoKeysEventArgs>(codecs_GeyKeyFound); codecs.EnumGeoKeys(srcFileName, 1); codecs.GeoKeyFound -= new EventHandler<CodecsEnumGeoKeysEventArgs>(codecs_GeyKeyFound); // We read all the tags now, save them to the file Console.WriteLine("{0} GeoKeys read, saving them to the destination file", myGeoKeys.Count); codecs.WriteGeoKeys(destFileName, 1, myGeoKeys); // Clean up codecs.Dispose(); } void codecs_GeyKeyFound(object sender, CodecsEnumGeoKeysEventArgs e) { Console.Write("GeoKey: Id={0}, Count={1}, Type={2}, Data Length={3}, Data=", e.Id, e.Count, e.MetadataType, e.Buffer.Length); // Load this GeoKey RasterCodecs codecs = sender as RasterCodecs; RasterTagMetadata geoKey = codecs.ReadGeoKey(geoKeyFileName, 1, e.Id); byte[] data = geoKey.GetData(); for (int i = 0; i < data.Length; i++) Console.Write("{0:X} ", data[i]); Console.WriteLine(); // Add it to our collection myGeoKeys.Add(geoKey); }
var myGeoKeys; var geoKeyFileName; function EnumGeoKeysExample(srcFileName, destFileName) { Tools.SetLicense(); with (Leadtools) { with (Leadtools.Codecs) { var codecs = new RasterCodecs(); Leadtools.RasterSupport.initialize(); codecs.eventsDispatchMode = Leadtools.LeadEventsDispatchMode.useCoreDispatcher; geoKeyFileName = srcFileName; myGeoKeys = new Array(); return Tools.AppInstallFolder().getFileAsync(srcFileName).then(function (loadFile) { codecs.addEventListener("geokeyfound", codecs_GeyKeyFound); return codecs.enumGeoKeysAsync(LeadStreamFactory.create(loadFile), 1) }) .then(function () { codecs.removeEventListener("geokeyfound", codecs_GeyKeyFound); // We read all the tags now, save them to the file console.info(myGeoKeys.length, " GeoKeys read, saving them to the destination file"); return Tools.AppLocalFolder().createFileAsync(destFileName, Windows.Storage.CreationCollisionOption.openIfExists) }) .then(function (saveFile) { return codecs.writeGeoKeysAsync(LeadStreamFactory.create(saveFile), 1, myGeoKeys) }) .then(function () { // Clean up codecs.close(); }); } } } function codecs_GeyKeyFound(e) { console.info("GeoKey: Id=", e.id, ", Count=", e.count, ", Type=", e.metadataType, ", Data Length=", e.buffer.length), ", Data="; Tools.SetLicense(); with (Leadtools) { with (Leadtools.Codecs) { // Load this GeoKey var codecs = e.target; return Tools.AppInstallFolder().getFileAsync(geoKeyFileName).then(function (loadFile) { return codecs.readGeoKeyAsync(LeadStreamFactory.create(loadFile), 1, e.id) }) .then(function (geoKey) { var data = geoKey.getData(); for (var i = 0; i < data.length; i++) console.info("{0:X} ", data[i]); console.info(""); // Add it to our collection myGeoKeys.push(geoKey); }); } } }
List<RasterTagMetadata> myGeoKeys; string geoKeyFileName; async Task EnumGeoKeysExample(string srcFileName, string destFileName) { RasterCodecs codecs = new RasterCodecs(); geoKeyFileName = srcFileName; myGeoKeys = new List<RasterTagMetadata>(); StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(srcFileName); codecs.GeoKeyFound += new EventHandler<CodecsEnumGeoKeysEventArgs>(codecs_GeyKeyFound); await codecs.EnumGeoKeysAsync(LeadStreamFactory.Create(loadFile), 1); codecs.GeoKeyFound -= new EventHandler<CodecsEnumGeoKeysEventArgs>(codecs_GeyKeyFound); // We read all the tags now, save them to the file Debug.WriteLine("{0} GeoKeys read, saving them to the destination file", myGeoKeys.Count); StorageFile saveFile = await Tools.AppLocalFolder.CreateFileAsync(destFileName, CreationCollisionOption.OpenIfExists); try { await codecs.WriteGeoKeysAsync(LeadStreamFactory.Create(saveFile), 1, myGeoKeys); } catch (Exception ex) { string error = ""; RasterException rasterException = RasterException.FromHResult(ex.HResult); if (rasterException != null) error = rasterException.Message; else error = ex.Message; Debug.WriteLine(error); Assert.Fail(error); } // Clean up codecs.Dispose(); } async void codecs_GeyKeyFound(object sender, CodecsEnumGeoKeysEventArgs e) { Debug.WriteLine("GeoKey: Id={0}, Count={1}, Type={2}, Data Length={3}, Data=", e.Id, e.Count, e.MetadataType, e.Buffer.Length); // Load this GeoKey RasterCodecs codecs = sender as RasterCodecs; StorageFile loadFile = await Tools.AppInstallFolder.GetFileAsync(geoKeyFileName); RasterTagMetadata geoKey = await codecs.ReadGeoKeyAsync(LeadStreamFactory.Create(loadFile), 1, e.Id); byte[] data = geoKey.GetData(); for (int i = 0; i < data.Length; i++) Debug.WriteLine("{0:X} ", data[i]); Debug.WriteLine(""); // Add it to our collection myGeoKeys.Add(geoKey); }
RasterCollection<RasterTagMetadata> myGeoKeys; Stream geoKeyStream; void EnumGeoKeysExample(Stream inStreamGeyKey, Stream outStreamGeyKey) { RasterCodecs codecs = new RasterCodecs(); geoKeyStream = inStreamGeyKey; myGeoKeys = new RasterCollection<RasterTagMetadata>(); codecs.GeoKeyFound += new EventHandler<CodecsEnumGeoKeysEventArgs>(codecs_GeyKeyFound); codecs.EnumGeoKeys(inStreamGeyKey, 1); codecs.GeoKeyFound -= new EventHandler<CodecsEnumGeoKeysEventArgs>(codecs_GeyKeyFound); // We read all the tags now, save them to the file Debug.WriteLine("{0} GeoKeys read, saving them to the destination file", myGeoKeys.Count); codecs.WriteGeoKeys(outStreamGeyKey, 1, myGeoKeys); } void codecs_GeyKeyFound(object sender, CodecsEnumGeoKeysEventArgs e) { Debug.WriteLine("GeoKey: Id={0}, Count={1}, Type={2}, DataLength={3}, Data=", e.Id, e.Count, e.MetadataType, e.Buffer.Length); // Load this GeoKey RasterCodecs codecs = sender as RasterCodecs; RasterTagMetadata geoKey = codecs.ReadGeoKey(geoKeyStream, 1, e.Id); byte[] data = geoKey.GetData(); for(int i = 0; i < data.Length; i++) Debug.WriteLine("{0:X} ", data[i]); Debug.WriteLine(""); // Add it to our collection myGeoKeys.Add(geoKey); }
Private myGeoKeys As RasterCollection(Of RasterTagMetadata)
Private geoKeyStream As Stream
Private Sub EnumGeoKeysExample(ByVal inStreamGeyKey As Stream, ByVal outStreamGeyKey As Stream)
Dim codecs As RasterCodecs = New RasterCodecs()
geoKeyStream = inStreamGeyKey
myGeoKeys = New RasterCollection(Of RasterTagMetadata)()
AddHandler codecs.GeoKeyFound, AddressOf codecs_GeyKeyFound
codecs.EnumGeoKeys(inStreamGeyKey, 1)
RemoveHandler codecs.GeoKeyFound, AddressOf codecs_GeyKeyFound
' We read all the tags now, save them to the file
Debug.WriteLine("{0} GeoKeys read, saving them to the destination file", myGeoKeys.Count)
codecs.WriteGeoKeys(outStreamGeyKey, 1, myGeoKeys)
End Sub
Private Sub codecs_GeyKeyFound(ByVal sender As Object, ByVal e As CodecsEnumGeoKeysEventArgs)
Debug.WriteLine("GeoKey: Id={0}, Count={1}, Type={2}, DataLength={3}, Data=", e.Id, e.Count, e.MetadataType, e.Buffer.Length)
' Load this GeoKey
Dim codecs As RasterCodecs = TryCast(sender, RasterCodecs)
Dim geoKey As RasterTagMetadata = codecs.ReadGeoKey(geoKeyStream, 1, e.Id)
Dim data As Byte() = geoKey.GetData()
Dim i As Integer = 0
Do While i < data.Length
Debug.WriteLine("{0:X} ", data(i))
i += 1
Loop
Debug.WriteLine("")
' Add it to our collection
myGeoKeys.Add(geoKey)
End Sub
Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2