LEADTOOLS Image File Support (Leadtools.Codecs assembly)

ReadGeoKeys(String,Int32) Method

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A System.String containing the input file name.
1-based index of the page from which to read the GeoKey tags.
Reads all the GeoKey data found in a TIFF file.
Syntax
'Declaration
 
Public Overloads Function ReadGeoKeys( _
   ByVal fileName As String, _
   ByVal pageNumber As Integer _
) As RasterCollection(Of RasterTagMetadata)
'Usage
 
Dim instance As RasterCodecs
Dim fileName As String
Dim pageNumber As Integer
Dim value As RasterCollection(Of RasterTagMetadata)
 
value = instance.ReadGeoKeys(fileName, pageNumber)

            

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

Parameters

fileName
A System.String containing the input file name.
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 stream containing the image data, use ReadGeoKeys(Stream,Int32).

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

Target Platforms

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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