img-dted - Img, Digital Terrain Elevation Data Format (dted)
package require Tk
package require img::dted ?1.4?
image create photo ?name?
?options?
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.
This format handler must be loaded explicitly with package
require img::dted.
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 |
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.
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
Copyright (c) 1995-2023 Jan Nijtmans <nijtmans@users.sourceforge.net>