20000925: GRDIMAGE issues

>From: Bill Fingerhut <address@hidden>
>Organization: Lyndon State
>Keywords: 200009251326.e8PDQ1b04272 McIDAS-X GRDIMAGE

Bill,

Sorry I havn't had time to get to this, but I have been struggling with
a number of things, not the least of which is the writing of an AMS
paper.  The unfortunate thing is that I will be out of the office
starting tomorrow (Wednesday, Sept. 17) until Sunday (Oct. 1).  After
that, I will be finishing my AMS paper and then preparing for the
Policy Committee meeting on October 5-6.  Sorry to moan, but I just
wanted to let you know why I havn't gotten back to you.

Anyway, see below for the small bit of input I can give.

>I have a problem with GRDIMAGE. When the source dataset position
>is greater than one, the wrong gridfile is used. To illustrate:
>
>->capture commands and responses
>
>TFILE did OPEN on window 0
>->list defined datasets
>DSSERVE LIST MYDATA
>Group/Descriptor         Type  Format & Range     RT Comment
>------------------------ ----- ------------------ -- --------------------
>MYDATA/GRIDS             GRID  GRID 2001-2099        Local Scratch Grids
>MYDATA/JGRDS             GRID  GRID 311-320          GLOBAL GRIDS
>MYDATA/JIMGS             IMAGE AREA 1800-1819        JET IMAGES
>MYDATA/MGRDS             GRID  GRID 2001-2002        SCRATCH MODEL GRIDS
>MYDATA/MIMGS             IMAGE AREA 3001-3010        SCRATCH FOR JETSTREAM
>MYDATA/SIMGS             IMAGE AREA 2001-2099        SCRATCH IMAGES
>DSSERVE: done
>
>->list existing grids
>GRDLIST MYDATA/GRIDS.4 NUM=ALL
>Dataset position 4      Directory Title=
>PAR    LEVEL       DAY        TIME    SRC FHOUR     FDAY       FTIME  GRID PRO
>---- --------- ------------ -------- ---- ----- ------------ -------- ---- ----
>U    MAXW      20 SEP 00264 00:00:00  AVN     0 20 SEP 00264 00:00:00 1    MERC
>V    MAXW      20 SEP 00264 00:00:00  AVN     0 20 SEP 00264 00:00:00 2    MERC
>SPD  MAXW      20 SEP 00264 00:00:00  AVN     0 20 SEP 00264 00:00:00 3    MERC
>Number of grids listed = 3
>GRDLIST - done
>
>->try to use an existing grid - position 4, grid 3
>
>GRDIMAGE MYDATA/GRIDS.4 MYDATA/MIMGS.5 RANGE=0 255 0 255 GRID=3 MAG=5 5
>GRDIMAGE: Failed to read grid
>TFILE CLOSE
>-----------------------------------------
>GRDIMAGE did not find the existing grid???

It is unexpected and points to a problem.

>I believe that GRDIMAGE is trying to read position one,
>not four, from my debugging (not shown).

Yes, I think you are correct.

>Am I doing something wrong???

No, I don't believe that you are.  This will merit a more thorough
investigation when I get back from trave.

Sorry I can't offer more at this time...

Tom