[gradsusr] problem with draw mark command

[Mira Losic]

Hi Jim,
Nevermind! I figured it out- I didn't realize GrADS could do sizes that
were fractions.
Thanks a lot for the help!
Mira

> Hi Mira:
>
> The first message is because you are not actively displaying a variable,
> so there is no scaling environment (see Jeff Duda's message from 10/19).
> So, display a variable first then you can "q w2xy", as you have in the
> second part of your message.
>
> The second problem is, I think, that you have switched the lat and lon
> in your query.  You have:
>
> query w2xy 64.3 -96.08
>
> and this will look for lon=64.3 and lat=-96.08, and so GrADS returns the
> page position to be at -300,-347 on the page.
>
> Jim
>
>
> Mira Losic wrote:
>> Hi All,
>>
>> I'd like to draw a map of my WRF domain (as should be described in my
>> ctl
>> file) and then simply mark a few stations within the domain with the
>> 'draw
>> mark' command in grads.  I get an error when trying to draw my first
>> mark.
>>
>> Below are my commands and my resulting error.
>>
>> ga-> open BASERUN_81_short.ctl
>> Scanning description file:  BASERUN_81_short.ctl
>> Data file BASERUN_81_short.nc is open as file 1
>> LON set to -116.1 -34.1464
>> LAT set to 55.9 78.7109
>> LEV set to 1 1
>> Time values set: 1981:7:1:6 1981:7:1:6
>> E set to 1 1
>> Notice: Implied interpolation for file BASERUN_81_short.ctl
>>  Interpolation will be performed on any data displayed from this file
>> ga-> set display color white
>> ga-> set mproj nps
>> ga-> set mpdset hires
>> MPDSET file name = hires
>> ga-> set grid on
>> grid is on, style 5 color 15
>> ga-> draw map
>> ga-> query w2xy 64.3 -96.08
>> No scaling environment
>>
>> The puzzling thing is that I do not get this error when I display a
>> variable, say SNOWH before I query the lat and lon (below), but I still
>> don't see a mark at the location on my map.
>>
>> ga-> open BASERUN_81_short.ctl
>> Scanning description file:  BASERUN_81_short.ctl
>> Data file BASERUN_81_short.nc is open as file 1
>> LON set to -116.1 -34.1464
>> LAT set to 55.9 78.7109
>> LEV set to 1 1
>> Time values set: 1981:7:1:6 1981:7:1:6
>> E set to 1 1
>> Notice: Implied interpolation for file BASERUN_81_short.ctl
>>  Interpolation will be performed on any data displayed from this file
>> ga-> set display color white
>> ga-> set mproj nps
>> ga-> set mpdset hires
>> MPDSET file name = hires
>> ga-> set grid on
>> grid is on, style 5 color 15
>> ga-> draw map
>> ga-> set t 1
>> Time values set: 1981:7:1:6 1981:7:1:6
>> ga-> d SNOWH
>> Notice:  Automatic Grid Interpolation Taking Place
>> Contouring: 0 to 240 interval 30
>> ga-> query w2xy 64.3 -96.08
>> X = -300.1  Y = -347.782
>> ga-> draw mark 1 -300.1 -347.782 3
>>
>> Any help or insight would be much appreciated!
>> Thanks so much,
>> Mira
>>
>>
>>
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>