Plotting gridded binary data

[Mary Jo Nath]

Brad,

Here's something to check:
How many bytes are in your file /home/bradn/WINDVERIF/comparing.dat
which contains one record with 360 x 181 elements? If your data is
32-bit, then your file should have 360 x 181 x 4 bytes. If it has "360 x
181 + 2) x 4 bytes, then you need to add "options sequential" to the
descriptor file to account for the extra control words (one at the start
and one at the end of the record.) If it's neither of these, then maybe
the problem is how the file was written.

MJ

Brad Navarro wrote:
>
> Hello all,
>
>
>
> I have a simple binary data file that is gridded globally from x=1,360
> and y= -90,90 (with spacing every 1 degree). There is only one
> variable, one level and one time. My control file looks like this:
>
>
>
> DSET  /home/bradn/WINDVERIF/comparing.dat
>
> TITLE  Qscat and GFS 10m wind comparison
>
> UNDEF  -0.9999E4
>
> XDEF 360 LINEAR 1 1
>
> YDEF 181 LINEAR -90 1
>
> ZDEF 1 LEVELS 1 1
>
> TDEF 1 LINEAR 12Z12APR07 3hr
>
> VARS 1
>
> diff 0 99 GFS-Qscat
>
> ENDVARS
>
>
>
>
>
> When I plot the data in GrADS, the data is not plotted correctly. It
> appears that the proper values are not being assigned to the proper
> latitude and longitudes. For reference, my binary file lists the
> variable's values in a 360 x 181 array, such that longitude is
> increasing with increasing row number, and latitude is increasing with
> increasing column number.
>
>
>
> I would be very appreciative if someone could help me solve this. I
> have tested the plot using a fixed longitude of 1 degree and latitude
> of -90 to 90, and it appears to work. However, when I add a second
> longitude of 2 degrees, it appears GrADS isn't plotting correctly.
>
>
>
> I am using Linux 2.4.9-e.40smp and GrADS version 1.9b4.
>
>
>
> Thanks,
>
> Brad
>
>
>
>
>
>
>
>
>

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