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img-dted(3tk) Img img-dted(3tk) 





NAME


img-dted - Digital Terrain Elevation Data format (dted)






SYNOPSIS


package require img::dted ?2.0?










DESCRIPTION


package require img::dted


Like all packages of Img it does not provide new
    commands, but extends the existing Tk command image, so that
    it supports files containing raster images in the Digital Terrain Elevation
    Data format (dted). More specifically img::dted extends Tk's
    photo [https://www.tcl.tk/man/tcl9.0/TkCmd/photo.html] image
  type.


The name of the new format handler is dted. This handler
    provides new additional configuration options. See section Options
    for more detailed explanations.


All of the above means that in a call like image create
    photo ?name? ?options?



  
[1]

  
Image data in dted format (options -data and -file) is
      detected automatically.

  
[2]

  
The format name dted is recognized by the option
    -format.




In addition the value of option -format is treated as a
    list and may contain any of the special options listed in section
    Options.


The package img::dted is not loaded when doing a
    package require Img, but must be loaded explicitly via package
    require img::dted.






NOTES



  
[1]

  
This format handler interprets DTED elevation files as grayscale
    images.

  
[2]

  
This format handler only supports read functionality.








OPTIONS


The handler provides the following options:



  

  
Available since version 1.4.0.
    
If set to true, additional information about the read
        data is printed to stdout. Default is false.

  

  

  
Available since version 1.4.0.
    
Specify the minimum pixel value to be used for mapping the
        input data to 8-bit image values. If not specified or negative, the
        minimum value found in the image data.

  

  

  
Available since version 1.4.0.
    
Specify the maximum pixel value to be used for mapping the
        input data to 8-bit image values. Default is the maximum value found in
        the elevation data. If not specified or negative, the maximum value
        found in the image data.

  

  

  
Available since version 1.4.0.
    
Specify a gamma correction to be applied when mapping the
        input data to 8-bit image values. Default is 1.0.

  








SEE ALSO


img, img-bmp, img-dted, img-flir, img-gif, img-ico, img-jpeg,
    img-pcx, img-pixmap, img-png, img-ppm, img-ps, img-raw, img-sgi, img-sun,
    img-tga, img-tiff, img-window, img-xbm, img-xpm






COPYRIGHT


Copyright (c) 1995-2024 Jan Nijtmans <nijtmans@users.sourceforge.net>
Copyright (c) 2002-2024 Andreas Kupries <andreas_kupries@users.sourceforge.net>
Copyright (c) 2003-2024 Paul Obermeier <obermeier@users.sourceforge.net>








  

    2.0
    img-dted