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Mars Digital Image Map - Disc 1.iso
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1991-09-06
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CCSD3ZF0000100000001NJPL3IF0PDS200000001 = SFDU_LABEL
RECORD_TYPE = STREAM
PRODUCT_CREATION_TIME = 1991-08-06
OBJECT = TEXT
NOTE = "Description of the Sun software
provided with the MDIM CD-ROM set"
END_OBJECT = TEXT
END
UNIX/SUN SPARCSTATION WITH OPEN WINDOWS 2.0 INTERFACE
-----------------------------------------------------
Although the software contained on this CDROM have been used and tested,
no warranty, expressed or implied, is made by NASA, the Jet Propulsion
Laboratory (JPL), or the United States Geological Survey (USGS) as to
the accuracy and functioning of the software and related materials, and
no responsibility is assumed by NASA, JPL, or the USGS.
HOW TO INSTALL:
1. Create a sub-directory to install the PDS map reader software.
mkdir <sub_directory_name>
2. Change directory into the sub-directory just created.
cd <sub_directory_name>
3. Copy the appropriate software from the SOFTWARE.SUN directory.
**** THE SOFTWARE ELEMENTS TO COPY *****
reader.bin executable
software.txt this document
gray.pal grayscale color map
mars.pal pseudo mars color map
openwin.pal optional grayscale color map with a bit of the
OpenWindow 2.0 default colors (to avoid color map
flicker)
SYSTEM REQUIREMENTS, RUN TIME and BUGS:
1. To run this software you need a Sun SparcStation with
OpenWindows 2.0 (It may work with OSF/Motif).
2. The S/W was developed using OpenWindows 2.0, devGuide 1.1,
and PDS Toolbox on a Sun's SparcStation 2.
3. Exiting the OpenWindows after running this program, the console
color map is clobbered. Use 'clear_colormap' to restore the default
console color map. I don't know what causes this.
4. The program has been tested on the 8-bit MDIM but not for 16-bit
DTM.
5. This software is not supported and it is distributed as it is.
Use it at your own risk. If you have any comments, improvements,
or bug reports, please e-mail to:
min@trantor.jpl.nasa.gov or
US mail to
Min-Kun Chung, M/S 301-142
Jet Propulsion Laboratory
4800 Oak Grove Drive
Pasadena, CA 91109
HOW TO USE THE PROGRAM:
1. Just type in "reader.bin" The optional parameters are as follows:
reader.bin <pds_map> <color_map> <stretch_fraction> <byte_order>
<pds_map> is the PDS digital image map name. i.e. mi70n135.img
The default is no map when first loaded.
<color_map> is the color map file name. i.e. gray.pal
A color map file is an ASCII text file with a series of
4 number columns. The structure of the file is as follows:
color index red blue green
For example, a gray scale map will look as follows:
0 0 0 0
1 1 1 1
2 2 2 2
. . . .
. . . .
. . . .
254 254 254 254
255 255 255 255
The default is the gray scale color map.
<stretch_fraction> is the fraction of the color to ignore from each
end, low and high. The histogram data on the PDS header is
used to set STRETCH LOW and STRETCH HIGH value using this
stretch_fraction value. The default is set to 0.000025.
<byte_order> is to indicate the 16-bit DTM data is in Sun short
integer format. This requires no byte swapping on the Sun.
The default assumes the 16-bit data is in VAX format,
and requires byte swapping.
2. The program opens a window titled "PDS MAP DISPLAY." The functions
in this window are as follows:
Typing in the PDS map name to load and clicking the LOAD
button loads the PDS map. Typing in the map name to load and
typing return does the same thing. If the map name typed in is
a directory (or a blank), then a directory browser is popped up.
The (current) directory is listed in the DIRECTORY of the directory
browser. An optional filter may be specified in the
FILTER such as *.img.
Clicking once on an entry of the file name list popup
displays the name on the map name entry item. Then the LOAD
button can be pressed to load the map. Double clicking on the
map name entry of the popup list also loads the map.
Typing in the zoom factor and clicking the ZOOM button
zooms the current map by that factor. Typing in the factor
and typing return also does the same thing.
Clicking on the COLOR button opens a color control pop window.
3. When a new map is loaded, the 8-bit histogram is examined along with
the <stretch_fraction> parameter, and the color map is stretched (or
the STRETCH LOW and HIGH values are set) to give a better contrast
automatically.
4. The PDS COLOR MAP CONTROL window allows a manual color control.
Typing in the colormap name and clicking on the LOAD button
loads the desired color. See above for the format of a color
map. "gray.pal" and "mars.pal" colormaps are provided.
On the COLOR MAP CONTROL window is a wide color bar. This
shows all 256 colors allocated to the map. The left most
position is color index 0 and the right most position is color
index 255.
The CYCLE slider shifts the color map. For example, cycle 100
will cause the original color index 0 to be changed to color
index 100. CYCLE can be set more easily by clicking the middle
button with the cursor on the color bar canvas.
STRETCH LOW and STRETCH HIGH enable color stretch. For
example if the LO value is 50 and HI value is 200, then the
original color index from 0 to 255 is re-scaled to fit from
50 to 200. STRETCH LOW value and STRETCH HIGH value can be
set more easily by clicking on LEFT and RIGHT mouse buttons
with the cursor on the color bar canvas.
Clicking on the RESET button resets the CYCLE to 0,
STRETCH LOW to 0, and STRETCH HIGH to 255.