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Leadtools.Codecs Namespace > Classes > RasterCodecs > Methods > ReadGeoKey Method > ReadGeoKey(Stream,Int32,Int32) Method
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ReadGeoKey(Stream,Int32,Int32) Method
Summary
Gets the specified GeoKey data from a TIFF stream.
Syntax
public Leadtools.RasterTagMetadata ReadGeoKey(Stream stream,int pageNumber,int id)
Public Overloads Function ReadGeoKey( _ByVal stream As Stream, _ByVal pageNumber As Integer, _ByVal id As Integer _) As Leadtools.RasterTagMetadata
public Leadtools.RasterTagMetadata ReadGeoKey(Stream stream,int pageNumber,int id)
- (nullable LTRasterTagMetadata *)readGeoKey:(NSUInteger)tagIdfromStream:(LTLeadStream *)streampageNumber:(NSInteger)pageNumbererror:(NSError **)error
public RasterTagMetadata readGeoKey(ILeadStream stream, int pageNumber, int id) function Leadtools.Codecs.RasterCodecs.ReadGeoKey(Stream,Int32,Int32)(stream ,pageNumber ,id)
public:Leadtools.RasterTagMetadata^ ReadGeoKey(Stream^ stream,int pageNumber,int id)
Parameters
stream
A Stream containing the input file data.
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
For an example, refer to ReadGeoKey.
Requirements
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© 1991-2017 LEAD Technologies, Inc. All Rights Reserved.
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