trim Documentation

trim - NULL the edges of a cube

"trim" will change the DN values on the edges of a cube.
The user supplies the TOP, BOTTOM, LEFT, and RIGHT line and sample
values that will determine the edges of the data for the cube.
TOP and BOTTOM determine the number of lines at the top and bottom
of each band that will be set to NULL values.  LEFT and RIGHT
are the number of samples that will be set to NULL on the left and
right sides of each band.

The user can also NULL the backplane edges by setting BPLANES to YES.

PROGRAMMER: Jim Mathews, U.S.G.S., Flagstaff, AZ

Input cube file name
  (default extension is .cub)

NONE

Input subcube specifier

--

Output cube file name
  (default extension is .cub)

NONE

Number of lines to NULL at
the top of the image
above

1

Number of lines to NULL at
the bottom of the image

1

Number of samples to NULL
on the left of the image

1

Number of samples to NULL
on the right of the image

1

Null backplanes - YES or NO

"NO"

User comment

" "

ADDITIONAL NOTES:

Parm	Description
FROM	Input cube file name. If the file extension is omitted, then ".cub" will be assumed.
SFROM	SFROM specifies the subcube using a single string for all three dimensions of the cube. The order of the three dimensions is always "samples:lines:bands". If a dimension is left blank, all the data for that dimension is selected. The default value of NULL for SFROM selects the entire cube. Any application below can be used for any dimension. To select specific data from any dimension: "10-100(3):11,12,15-20:1-10(2)" = This example will select every third sample starting with sample 10 thru 100. It selects lines 11 and 12, and 15-20. It selects every other band, starting with band 1 thru 10. There are special characters that can be used for selecting a subcube efficiently, such as "*","#", and "~". For examples type "help sfrom" in TAE. **NOTE** For more examples and explanation of the many features of the SFROM parameter, tutor the sfrom.pdf or refer to Introduction To ISIS, Section 6, of the ISIS User's Manual **
TO	Output cube file name. If the file extension is omitted, then ".cub" will be assumed.
TOP	Number of lines to NULL at the top of the image.
BOTTOM	Number of lines to NULL at the bottom of the image.
LEFT	Number of samples to NULL on the left side of the image.
RIGHT	Number of samples to NULL on the right side of the image.
BPLANES	Decision to NULL the backplanes. Enter YES or NO.
USERNOTE	Comment from the user. This will be recorded in the ISIS session log file and also in the History entry that is put into the History object of the output file.