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ReadGeoKey(string,int,int) Method

Summary

Gets the specified GeoKey data from a TIFF file.

Syntax
C#
VB
Objective-C
C++
public RasterTagMetadata ReadGeoKey( 
   string fileName, 
   int pageNumber, 
   int id 
) 
Public Overloads Function ReadGeoKey( _ 
   ByVal fileName As String, _ 
   ByVal pageNumber As Integer, _ 
   ByVal id As Integer _ 
) As RasterTagMetadata 
- (nullable LTRasterTagMetadata *)readGeoKey:(NSUInteger)tagId  
                                    fromFile:(NSString *)file  
                                  pageNumber:(NSInteger)pageNumber  
                                       error:(NSError **)error 
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

The GeoKey data.

Remarks

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.

Example

Refer to EnumGeoKeys.

Requirements

Target Platforms

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