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img-dted(n)                           Img                          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 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

       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   | 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, 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-dted                              1.4                          img-dted(n)