Re: Drawing streamlines freezes NCL script

Hi Mary,

Do you mean sending you the scripts directly? I sent one yesterday.
Please check. Thanks.

Samuel

On 16 Apr 2009, at 12:52, Mary Haley <haley_at_ucar.edu> wrote:

> Hi Samuel,
>
> It is hard to tell what's going on as there are a number of
> streamline resources
> being set, any of which could be the problem.
>
> Can you provide us with a full script and data so we can run it
> here? You
> can email me with this information offline.
>
> Thanks,
>
> --Mary
>
> On Apr 15, 2009, at 6:59 PM, Samuel Leung wrote:
>
>> Hello NCL team,
>>
>> I faced a problem overlaying streamlines on a map. I used
>> gsn_csm_streamline to draw the streamlines.
>>
>> When I ran the ncl for generating the images, the ncl stopped at the
>> line where gsn_csm_streamline is located, and the postscript file
>> generated then became bigger and bigger in filesize. This status
>> seemed not to have an end as I saw the filesize of the postscript
>> file
>> can reach in giga byte (normally a 10MB postscript is adequate for
>> making the images I am working on). I needed to terminate the ncl by
>> myself and no images were obtained.
>>
>> The scripts I used for the streamline are as follows. It is also in
>> the end of the ncl.
>> -----------------------
>> ...
>> plot = gsn_csm_vector_scalar_map(wks,
>> uu,vv,rh,res)
>>
>> resS = True
>> resS_at_gsnTickMarksOn = False
>>
>> resS_at_vpWidthF = 0.879
>> resS_at_vpHeightF = 0.7
>> resS_at_vpXF = 0.102
>> resS_at_vpYF = 0.922
>>
>> resS_at_stMinStepFactorF = 2 ; 2
>> resS_at_stLengthCheckCount = 4 ; 35
>> resS_at_stCrossoverCheckCount = -1
>> resS_at_stMinDistanceF = 0.2
>> resS_at_stArrowLengthF = 0.01 ; changes the size of the
>> arrows.
>> resS_at_stLineThicknessF = 1.5 ; changes the line thickness
>> resS_at_stMinArrowSpacingF = 0.3
>>
>> resS_at_stLineColor = "black" ; changes color
>> resS_at_gsnRightString = ""
>> resS_at_gsnLeftString = ""
>> resS_at_gsnCenterString = ""
>> ;resS_at_tfDoNDCOverlay = True
>>
>> plotS = gsn_csm_streamline(wks,uu,vv,resS)
>> overlay(plot,plotS)
>> draw(plot)
>>
>> frame(wks)
>>
>> end
>> -----------------------
>>
>> I tried to comment the gsn_csm_streamline and the map itself can be
>> generated successfully. I thought the streamline drawing part is the
>> root cause of the problem.
>>
>> This problem can be skipped by setting a larger stMinDistanceF value
>> but it will result as almost no streamlines drawn.
>>
>> The ncl version I am using is 4.2.0.a033. I also tried 5.0.0 but it
>> looked like no difference.
>>
>> Thanks in advance for your help.
>>
>> Regards,
>> Samuel Leung
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>
Received on Thu Apr 16 2009 - 19:03:20 MDT