NAME¶
img-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>