NAME

       img-dted - Img, Digital Terrain Elevation Data Format (dted)

SYNOPSIS

       package require Tk

       package require img::dted  ?1.4?

       image create photo ?name? ?options?

________________________________________________________________________________________________________________

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 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-flir,  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) 1995-2023 Jan Nijtmans <nijtmans@users.sourceforge.net>

img-dted                                               1.4                                         img-dted(3tk)