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[comment {-*- tcl -*- doctools}]
[vset FORMATNAME dted]
[vset FORMATFULLNAME {DTED Format}]
[include format-header.inc]
This handler provides new additional configuration options. See
section [sectref {DTED OPTIONS}] for more detailed explanations.
[include format-middle.inc]
In addition the value for the option is treated as list and may
contain any of the special options listed in section
[sectref {DTED OPTIONS}].
[list_end]
[section {NOTE}]
This format handler must be loaded explicitly with
[cmd "package require img::[vset FORMATNAME]"].
[section {SUPPORTED DTED TYPES}]
[example_begin]
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 |
[example_end]
[section {DTED OPTIONS}]
The handler provides the following options:
[list_begin definitions]
[lst_item "[option -verbose] [arg bool]"]
If set to [const true], additional information about the loaded image
is printed to stdout. Default is [const false].
[lst_item "[option -nchan] [arg int]"]
Specify the number of channels of the generated image.
Default is [const 1], i.e. generate a grayscale image.
[lst_item "[option -gamma] [arg float]"]
Specify a gamma correction to be applied when mapping
the input data to 8-bit image values.
Default is [const 1.0].
[lst_item "[option -nomap] [arg bool]"]
If set to [const true], no mapping of input values is done.
Use this option, if your elevation file contains
values in the range of [const 0] .. [const 255] only.
Default is [const false].
[lst_item "[option -min] [arg 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.
[lst_item "[option -max] [arg short]"]
This option is supported for reading only.
[nl]
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.
[list_end]
[list_begin definitions]
[include format-footer.inc]
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