ReadGeoKey(String,Int32,Int32) Method

public RasterTagMetadata ReadGeoKey( 
   string fileName,
   int pageNumber,
   int id
)

'Declaration
 

Public Overloads Function ReadGeoKey( _
   ByVal fileName As String, _
   ByVal pageNumber As Integer, _
   ByVal id As Integer _
) As RasterTagMetadata

'Usage
 

Dim instance As RasterCodecs
Dim fileName As String
Dim pageNumber As Integer
Dim id As Integer
Dim value As RasterTagMetadata
 
value = instance.ReadGeoKey(fileName, pageNumber, id)

public RasterTagMetadata ReadGeoKey( 
   string fileName,
   int pageNumber,
   int id
)

- (nullable LTRasterTagMetadata *)readGeoKey:(NSUInteger)tagId 
                                    fromFile:(NSString *)file 
                                  pageNumber:(NSInteger)pageNumber 
                                       error:(NSError **)error
            

 function Leadtools.Codecs.RasterCodecs.ReadGeoKey(String,Int32,Int32)( 
   fileName ,
   pageNumber ,
   id 
)

public:
RasterTagMetadata^ ReadGeoKey( 
   String^ fileName,
   int pageNumber,
   int id
) 

Parameters

fileName

A String containing the input file name.

pageNumber

1-based index of the page from which to read the GeoKey.

id

GeoKey ID. Values of the GeoKey ID range between 0 and 65535. Possible ranges are:

Range	Meaning
0..1023	Do not use; reserved for future use.
1024..2047	GeoTIFF Configuration Keys.
2048..3071	Geographic/Geocentric CS Parameter Keys.
3072..4095	Projected CS Parameter Keys.
4096..5119	Vertical CS Parameter Keys.
5120..32767	Reserved.
32768..65535	Private use - use to store your own data.

Return Value

You can use this method to obtain the GeoKey data from a particular file.

If no such GeoKey exists in the image, this method will return a null reference.

The most efficient way of reading the GeoKeys in a file is to enumerate them with EnumGeoKeys and then read each GeoKey with ReadGeoKey.

Target Platforms

Reference

RasterCodecs Class
RasterCodecs Members
Overload List
Implementing GeoKeys (GeoTIFF tags)
Implementing TIFF Comments and Tags