DOKK / manpages / debian 11 / libtk-img-doc / img-dted.3tk.en
img-dted(3tk) Img img-dted(3tk) 







img-dted - Img, DTED Format (dted)








package require Tk 


package require img::dted ?1.4?


image create photo ?name?
  ?options?












The package img::dted is a sub-package of Img. It
    can be loaded as a part of the complete Img support, via package require
    Img, or on its own, via 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 DTED Format (dted). More
    specifically img::dted extends Tk's photo image
  type.


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


All of the above means that in a call like



  

  





  
[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 for the option is treated as list and may contain any
      of the special options listed in section DTED OPTIONS.










This format handler must be loaded explicitly with package
    require img::dted.












 Interpret DTED terrain elevation data as a grayscale image.


 List of currently supported features:


 Type   |     Read      |     Write     |


        | -file | -data | -file | -data |


 ----------------------------------------


 Gray   | Yes   | Yes   | No    | No   |











The handler provides the following options:



  

  
If set to true, additional information about the loaded image is
      printed to stdout. Default is false.

  

  
Specify the number of channels of the generated image. Default is
      1, i.e. generate a grayscale image.

  

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

  

  
If set to true, no mapping of input values is done. Use this
      option, if your elevation file contains values in the range of 0 ..
      255 only. Default is false.

  

  
Specify the minimum pixel value to be used for mapping the input data to
      8-bit image values. Default is the minimum value found in the elevation
      data.

  

  
This option is supported for reading only.
    
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.

  










img-bmp, img-dted, img-gif, img-ico, img-intro, 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








dted, image handling, tk








Copyright (c) 1995-2009 Jan Nijtmans <nijtmans@users.sourceforge.net>








  

    1.4
    img-dted