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Leadtools.Codecs Namespace > Classes > RasterCodecs > Methods > ReadGeoKeys Method > ReadGeoKeys(Stream,Int32) Method
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ReadGeoKeys(Stream,Int32) Method
Summary
Reads all the GeoKey data found in a stream.
Syntax
public Leadtools.RasterCollection<RasterTagMetadata> ReadGeoKeys(Stream stream,int pageNumber)
Public Overloads Function ReadGeoKeys( _ByVal stream As Stream, _ByVal pageNumber As Integer _) As Leadtools.RasterCollection(Of RasterTagMetadata)
public Leadtools.RasterCollection<RasterTagMetadata> ReadGeoKeys(Stream stream,int pageNumber)
- (nullable NSArray<LTRasterTagMetadata *> *)readGeoKeysFromStream:(LTLeadStream *)streampageNumber:(NSInteger)pageNumbererror:(NSError **)error
public RasterCollection<RasterTagMetadata> readGeoKeys(ILeadStream stream, int pageNumber) function Leadtools.Codecs.RasterCodecs.ReadGeoKeys(Stream,Int32)(stream ,pageNumber)
public:Leadtools.RasterCollection<RasterTagMetadata^>^ ReadGeoKeys(Stream^ stream,int pageNumber)
Parameters
stream
A 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 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 GeoKey stored in a file, use ReadGeoKey and to enumerate all the GeoKeys stored in a file use EnumGeoKeys.
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.
Example
For an example, refer to ReadTags.
Requirements
See Also
Reference
ReadGeoKeys(String,Int32) Method
EnumGeoKeys(String,Int32) Method
Implementing TIFF Comments and Tags
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© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
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