base2l1 Documentation

base2l1 - Create TFILE to project a mosaic to "level1" geometry
Create the transformation data file (TFILE) for "geom" (see "geom" for
more information) to project a Clementine, Galileo, Mariner, Viking or
Voyager  "level2" cube  or mosaic  from a  map projection  to "level1"
geometry using a "level1" cube-to-match.
The output "level1" cube will be assigned a false FSC number for "jig-
saw"'s book-keeping purposes  to distinguish  the cube from the actual
"level1" cube with  a real  FSC.  The idea  is to  allow conversion to
"level1" for control point selection with other actual "level1" cubes.
The ouput level1 will default to undistorted space unless the OPT par-
ameter is set to DISTORTED.

This program does not do the actual transformation of the cube; "geom"
must be run  using the  TFILE created  by this program  and the level2
cube. (The "from" parameter will use level2 to level4.)

BASE2L1 is a tool you can use in order to
select match points between a 'level1' image
and a projected control base mosaic.

For example:
If you are  processing  an SSI  ganymede frame and
want to update the camera  angles according to the
Voyager Ganymede base mosaic, you would do the fol-
lowing:

BASE2L1 FROM=Ganymede_VGR_mosaic LEVEL1=SSI_frame
        FALSENO=9999 TFILE=tfile.dat
GEOM FROM=Ganymede_VGR_mosaic TO=Gany_VGR_level1
     TFILE=tfile.dat

This  would take the coordinates of your SSI_frame
and extract  that area out of the Ganymede Voyager
mosaic and project the mosaic subarea to a "level1"
view.  TVTIE,/match  option  only  allows  "level1"
images to select match points.  So you would  pick
points between your SSI image  and  the  Gany_VGR_
level1 (output of BASE2L1).  When you 'jigsaw', you
enter  both images and  hold  the  Gany_VGR_level1
image for your truth.  The BASE2L1 output file can
then be deleted,  and what you have left is an SSI
image  with  camera  angles updated to the Voyager
control base map. (example by T.Becker)

PROGRAMMER: K. Teal Thompson, USGS, Flagstaff, AZ; 22 May 97

Input cube name
(default extension is .cub)

NONE

"level1" cube-to-match

NONE

Transformation file
(no default extension)

tfile.dat

False IMAGE_NUMBER

1

Create an UNDISTORTED or
DISTORTED cube

UNDISTORTED

ADDITIONAL NOTES:

Parm	Description
FROM	Input cube file name. If the file extension is omitted, then ".cub" will be assumed. Level2 or higher.
LEVEL1	Input cube file name. If the file extension is omitted, then ".cub" will be assumed. This is the file whose geo- metry will be matched. This file will be used along with the output file (from this program and geom) in "tvtie", "tvmatch" to add match points. Then "jigsaw" will be used to correct the camera pointing of the "level1" cube. NOTE: the output cube must be "held" in "jigsaw".
TFILE	This is the name given to a data file needed by "geom". After this program has finished, "geom" must be run to actually transform the cube.
FALSENO	This parameter will allow "jigsaw" to use one number (FALSENO) for the ("level1") output cube by "base2l1" and the original IMAGE_NUMBER for the "level1" cube-to-match. This input falseno will also be sent to "jigsaw" as prodid.
OPT	This option allows the user to create either an undistorted cube (UNDISTORTED) or a distorted cube (DISTORTED).