LEADTOOLS Image File Support (Leadtools.Codecs assembly)
LEAD Technologies, Inc

ReadGeoKeys(Stream,Int32) Method






A System.IO.Stream containing the input TIFF image data.
1-based index of the page from which to read the GeoKey tags.
Read all the GeoKey data found in a stream. .NET support Silverlight support
Syntax
public RasterCollection<RasterTagMetadata> ReadGeoKeys( 
   Stream stream,
   int pageNumber
)
'Declaration
 
Public Overloads Function ReadGeoKeys( _
   ByVal stream As Stream, _
   ByVal pageNumber As Integer _
) As RasterCollection(Of RasterTagMetadata)
'Usage
 
Dim instance As RasterCodecs
Dim stream As Stream
Dim pageNumber As Integer
Dim value As RasterCollection(Of RasterTagMetadata)
 
value = instance.ReadGeoKeys(stream, pageNumber)
public RasterCollection<RasterTagMetadata> ReadGeoKeys( 
   Stream stream,
   int pageNumber
)
 function Leadtools.Codecs.RasterCodecs.ReadGeoKeys(Stream,Int32)( 
   stream ,
   pageNumber 
)
public:
RasterCollection<RasterTagMetadata^>^ ReadGeoKeys( 
   Stream^ stream,
   int pageNumber
) 

Parameters

stream
A System.IO.Stream containing the input TIFF image data.
pageNumber
1-based index of the page from which to read the GeoKey tags.

Return Value

A collection of Leadtools.RasterTagMetadata containing all the GeoKey tags found in the file. If the file does not contain any GeoKeys, an empty collection will be returned. If the file format does not support GeoKeys, an exception will be thrown.
Remarks

To read a specific geo key stored in a file, use ReadGeoKey(String,Int32,Int32) and to enumerate all the GeoKeys stored in a file use EnumGeoKeys(String,Int32).

This method will throw an exception if the file format does not support GeoKeys. To determine whether a file format supports GeoKeys, use GeoKeysSupported. You can also automatically load all the GeoKeys stored in a file during a load operation by setting the CodecsLoadOptions.GeoKeys property to true. The GeoKeys data will be stored in the resulting image RasterImage.GeoKeys collection.

To load all the GeoKeys stored in a disk file, use ReadGeoKeys(String,Int32).

Example
For an example, refer to ReadTags(String,Int32).
Requirements

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

See Also

Reference

RasterCodecs Class
RasterCodecs Members
Overload List
GeoKeysSupported Method
ReadGeoKeys(String,Int32) Method
EnumGeoKeys(String,Int32) Method
CommentsSupported Method
GeoKeysSupported Method
GeoKeys Property
RasterImage.GeoKeys
Working with Markers
Implementing TIFF Comments and Tags
TIFF File Comments
Implementing GeoKeys (GeoTIFF tags)
Leadtools.RasterCommentMetadataType

 

 


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