img-dted(n)img-dted(n)______________________________________________________________________________NAMEimg-dted - Img, DTED Format (dted)
SYNOPSIS
package require Tk
package require img::dted ?1.4?
image create photo ?name? ?options?
_________________________________________________________________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 1.4 img-dted(n)
