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img-dted(n)                                                                                      img-dted(n)



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NAME
       img-dted - Img, DTED Format (dted)

SYNOPSIS
       package require Tk

       package require img::dted  ?1.4?

       image create photo ?name? ?options?

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DESCRIPTION
       The  package  img::dted  is a sub-package of Img. It can be loaded as a part of the complete Img sup-port, support,
       port, 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

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


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

SUPPORTED DTED TYPES
        Interpret DTED terrain elevation data as a grayscale image.

        List of currently supported features:

        Type   |     Read      |     Write     |
               | -file | -data | -file | -data |
        ----------------------------------------Gray ---------------------------------------Gray
        Gray   | Yes   | Yes   | No    | No   |



DTED OPTIONS
       The handler provides the following options:

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

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

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

       -nomap bool
              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.

       -min short
              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.

       -max short
              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.



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

KEYWORDS
       dted, image handling, tk

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




Img                                                  1.4                                         img-dted(n)